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Table of Contents

DLSw+ Configuration Commands

DLSw+ Configuration Commands

This chapter describes the commands to configure data-link switching plus (DLSw+), our implementation of the DLSw standard. For DLSw+ configuration tasks and examples, refer to the "Configuring Data-Link Switching Plus" chapter of the Bridging and IBM Networking Configuration Guide. For specific SDLC commands to configure DLSw+ for SDLC, refer to the "LLC2 and SDLC Commands" chapter in this publication.

clear dlsw circuit

Use the clear dlsw circuit privileged EXEC command to cause all DLSw+ circuits to be closed.

clear dlsw circuit [circuit id]

Syntax Description

circuit-id

Circuit ID for a specific remote circuit. The valid range is 0 to 4294967295.

Command Mode

Privileged EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.2 F.

A user can specify a circuit ID of a specific circuit to clear rather than clearing all circuits.

Caution This command also drops the associated LLC2 session. The command usage should be used with caution and under the advice of a Cisco engineer.

Example

The following example closes all DLSw+ circuits:

clear dlsw circuit

clear dlsw reachability

Use the clear dlsw reachability privileged EXEC command to remove all entries from the DLSw+ reachability cache.

clear dlsw reachability

Syntax Description

This command has no arguments or keywords.

Command Mode

Privileged EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.2 F.

This command does not affect existing sessions.

Example

The following example removes all entries from the DLSw+ reachability cache:

clear dlsw reachability

clear dlsw statistics

Use the clear dlsw statistics privileged EXEC command to reset to zero the number of frames that have been processed in the local, remote, and group cache.

clear dlsw statistics

Syntax Description

This command has no arguments or keywords.

Command Mode

Privileged EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.2 F.

Example

The following example resets to zero the number of frames in the local, remote, and group cache:

clear dlsw statistics

dlsw allroute-netbios

Use the dlsw allroute-netbios global configuration command to change the single-route explorer to an all-route broadcast for NetBIOS. Use the no form of this command to return to the default single-route explorer.

dlsw allroute-netbios
no dlsw allroute-netbios

Syntax Description

This command has no arguments or keywords.

Default

Single-route explorer

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.1.

Example

The following example specifies all-route broadcasts for NetBIOS:

dlsw allroute-netbios

dlsw allroute-sna

Use the dlsw allroute-sna global configuration command to change the single-route explorer to an all-route broadcast for SNA. Use the no form of this command to return to the default single-route explorer.

dlsw allroute-sna
no dlsw allroute-sna

Syntax Description

This command has no arguments or keywords.

Default

Single-route explorer

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.1.

Example

The following example specifies all-route broadcasts for SNA:

dlsw allroute-sna

dlsw bgroup-list

Use the dlsw bgroup-list global configuration command to map traffic on the local Ethernet bridge group interface to remote peers. Use the no form of this command to cancel the map.

dlsw bgroup-list list-number bgroups number
no dlsw bgroup-list

Syntax Description

list-number

The ring list number. This number is subsequently used in the dlsw remote-peer command to define the segment to which the bridge-group should be applied. The valid range is 1 to 255.

number

The transparent bridge group list number. The valid range is 1  to 63.

Default

There is no default setting.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

Traffic received from a remote peer is forwarded only to the bridge group specified in the bridge group list. Traffic received from a local interface is forwarded to peers if the input bridge group number appears in the bridge group list applied to the remote peer definition. The definition of a bridge group list is optional. Each remote peer has a single list number associated with it; therefore, if you want traffic to go to a bridge group and to either a ring list or port list, you should specify the same list number in each definition.

Example

The following example configures bridge-group list 1:

dlsw bgroup-list 1 bgroups 33

Related Commands

You can use the master indexes or search online to find documentation of related commands.

dlsw bridge-group
dlsw ring-list

dlsw bridge-group

Use the dlsw bridge-group global configuration command to link DLSw+ to the bridge group of the Ethernet LANs. Use the no form of this command to disable the link.

dlsw bridge-group group-number [llc2 [N2 number] [ack-delay-time milliseconds]
[ack-max  number] [idle-time milliseconds] [local-window number] [t1-time milliseconds]
[tbusy-time  milliseconds] [tpf-time milliseconds] [trej-time milliseconds]
[txq-max  number] [xid-neg-val-time milliseconds] [xid-retry-time milliseconds]]
[locaddr-priority lu address priority list number] [sap-priority priority list number ]
no dlsw bridge-group
group-number [llc2 [N2 number] [ack-delay-time milliseconds]
[ack-max  number] [idle-time milliseconds] [local-window number] [t1-time milliseconds]
[tbusy-time  milliseconds] [tpf-time milliseconds] [trej-time milliseconds]
[txq-max  number] [xid-neg-val-time milliseconds] [xid-retry-time milliseconds]]
[locaddr-priority lu address priority list number ] [sap-priority priority list number ]

Syntax Description

group-number

The transparent bridge group to which DLSw+ will be attached. The valid range is 1 to 63.

llc2

(Optional) LLC2 interface subcommands.

N2 number

(Optional) Number of times router should retry various operations. The valid range is 1 to 255.

ack-delay-time milliseconds

(Optional) Max time the router allows incoming I-frames to stay unacknowledged. The valid range is 1 to 60000.

ack-max  number

(Optional) Max number of I-frames received before an acknowledgment must be sent. The valid range is 1 to 255.

idle-time milliseconds

(Optional) Frequency of polls during periods of idle traffic. The valid range is 1 to 60000.

local-window number

(Optional) Max number of I-frames to send before waiting for an acknowledgment. The valid range is 1 to 127.

t1-time milliseconds

(Optional) How long router waits for an acknowledgment to transmitted I-frames. The valid range is 1 to 60000.

tbusy-time  milliseconds

(Optional) Amount of time router waits while the other LLC2 station is in a busy state before attempting to poll the remote station. The valid range is 1 to 60000.

tpf-time milliseconds

(Optional) Amount of time router waits for a final response to a poll frame before re-sending the original poll frame. The valid range is 1  to  60000.

trej-time milliseconds

(Optional) Amount of time router waits for a resend of a rejected frame before sending the reject command. The valid range is 1  to  60000.

txq-max  number

(Optional) Queue for holding llc2 information frames. The valid range is 20  to  200.

xid-neg-val-time milliseconds]

(Optional) Frequency of exchange of identification (XID). The valid range is 1  to  60000.

xid-retry-time milliseconds

(Optional) How long router waits for reply to XID. The valid range is 1  to  60000.

locaddr-priority lu address priority list number

(Optional) Assign an input SNA LU Addr priority list to this bridge group. The valid range is 1 to 10.

sap-priority priority list number

(Optional) Assign an input sap priority list to this bridge group. The valid range is 1 to 10.

Default

There is no default setting.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

More than one bridge group can be attached to DLSw+ by using this command multiple times. Multiple bridge group support is available in Cisco IOS Release 11.3.

Example

The following example links DLSw+ to bridge group 1, 2, and 3:

dlsw local-peer peer-id 1.1.1.1
dlsw remote-peer 0 tcp 2.2.2.2
dlsw bridge-group 1
dlsw bridge-group 2
dlsw bridge-group 3
interface Ethernet0
  bridge-group 1
interface Ethernet1
  bridge-group 2
interface Ethernet2
  bridge-group 3
bridge 1 protocol ieee
bridge 2 protocol ieee
bridge 3 protocol ieee

Related Commands

You can use the master indexes or search online to find documentation of related commands.

dlsw bgroup-list

dlsw disable

Use the dlsw disable global configuration command to disable DLSw+ without altering the configuration. Use the no form of this command to reenable DLSw+.

dlsw disable
no dlsw disable

Syntax Description

This command has no arguments or keywords.

Default

There is no default setting.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

Example

The following example reenables DLSw+:

no dlsw disable

dlsw duplicate-path-bias

Use the dlsw duplicate-path-bias global configuration command to specify how DLSw+ handles duplicate paths to the same Media Access Control (MAC) address or NetBIOS name. Use the no form of this command to return to the default (fault-tolerance).

dlsw duplicate-path-bias [load-balance]
no dlsw duplicate-path-bias [load-balance]

Syntax Description

load-balance

(Optional) Specifies that sessions are load-balanced across duplicate paths.

Default

Fault-tolerance is the default logic used to handle duplicate paths.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

A path is either a remote peer or a local port.

In full-tolerance mode, the preferred path is always used unless it is unavailable. The preferred path is either the path over which the first response to an explorer was received, or, in the case of remote peers, the peer with the least cost.

Example

The following example specifies load balancing to resolve duplicate paths:

dlsw duplicate-path-bias load-balance

dlsw group-cache disable

Use the dlsw group cache disable global configuration command to disable the border peer caching feature. Use the no form of this command to return to the default peer caching feature.

dlsw group-cache disable
no dlsw group-cache disable

Syntax Description

This command has no arguments or keywords.

Default

Border peer caching is enabled.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.2 F.

If a border peer becomes a nonborder peer, then the group cache is automatically deleted.

This command prevents a border peer from learning reachability information from relay responses. This command also prevents a border peer from using local or remote caches to make forwarding decisions.

Example

The following example disables the group cache:

dlsw group-cache disable

Related Commands

You can use the master indexes or search online to find documentation of related commands.

dlsw group-cache max-entries

dlsw group-cache max-entries

Use the dlsw group-cache max entries global configuration command to limit the number of entries in the group cache. Use the no form of this command to return to the default.

dlsw group-cache max-entries number
no dlsw group-cache max entries

Syntax Description

number

Maximum number of entries allowed in the group cache. The valid range is 0 through 12000. If the value is set to 0, then there is no limit to the number of entries. The default is 2000.

Default

The default setting is 2000.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.2 F.

Once the number of entries has reached the maximum number specified, if a new entry needs to be added an entry will be removed to make room.

The value set for number applies to both the NetBIOS and SNA group cache.

Example

The following configuration defines the maximum number of entries allowed in the NetBIOS or SNA group cache as 1800:

dlsw group-cache max-entries 1800

Related Commands

You can use the master indexes or search online to find documentation of related commands.

dlsw group-cache disable

dlsw icannotreach saps

Use the dlsw icannotreach saps global configuration command to configure a list of service access points (SAPs) not locally reachable by the router. Use the no form of this command to remove the list.

dlsw icannotreach saps sap [sap...]
no dlsw icannotreach saps sap [sap...]

Syntax Description

sap [sap...]

One or more SAPs.

Default

No lists are configured.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3

The dlsw icannotreach saps command causes the local router to send a control vector to its peers during the capabilities exchange, which tells the peers not to send canureach messages to the local router for sessions using those DSAPs. (They are DSAPs from the peer's perspective, and SSAPs from the perspective of the devices attached to the local router.) The effect is that devices attached to the peer will not be able to initiate sessions to devices attached to the local router using the listed DSAPs. Devices attached to the local router, however, will still be able to start sessions with devices on its peers using the listed saps as SSAPs. The reason is that the local router can still send canureach requests to its peers, since no filtering is actually done on the local router. The filtering done by the peers does not prohibit the peers from responding to canureach requests from the local router sending the control vector, only sending canureach requests to the local router.

Example

The following example specifies that NetBIOS traffic will be denied:

dlsw icannotreach saps F0

dlsw icanreach

Use the dlsw icanreach global configuration command to configure a resource that is locally reachable by this router. Use the no form of this command to remove the resource.

dlsw icanreach {mac-exclusive | netbios-exclusive [remote] | mac-address mac-addr
[mask mask] | netbios-name name | saps}
no dlsw icanreach {mac-exclusive | netbios-exclusive [remote] | mac-address mac-addr
[mask mask] | netbios-name name | saps}

Syntax Description

mac-exclusive

Router can reach only the MAC addresses that are user configured.

netbios-exclusive

Router can reach only the NetBIOS names that are user configured.

remote

Gives the NetBIOS workstations (that are local to the router and that are not already defined in the dlsw icanreach netbios-name name statement) access to remote servers.

mac-address mac-addr

Configures a MAC address that this router can locally reach.

mask mask

(Optional) MAC address mask in hexadecimal h.h.h. The "f" value represents the "don't care" bit and the "0" value represents the "care" bit. The mask indicates which bits in the MAC address are relevant.

netbios-name name

Configures a NetBIOS name that this router can locally reach. Wildcards (*) are allowed at the end of the name. Trailing white spaces are ignored when comparing against an actual name in a NetBIOS frame.

saps

(Optional) Array of SAPs.

Default

No resources are configured.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

This command can be entered at any time. It causes a capabilities exchange to relay the information to all active peers. By specifying resource names or MAC addresses in this command, you can avoid broadcasts from remote peers that are looking for this resource. By specifying "exclusive" you can avoid broadcasts to this router or any resources. For example, you could configure the front-end processor (FEP) MAC address or corporate site LAN servers in central site routers to avoid any broadcasts over the WAN for these resources.

Configuring the remote keword allows roving workstations to access remote servers. With the remote keyword specified, all local NetBIOS stations will be able to make outgoing connections regardless of whether their own NetBIOS name is configured in the icanreach netbios-name list. Incoming connections will be limited to those with a destination name that is specified in the list.

In the default case (where the remote keyword is not specified), a local Netbios station that is not configured in the icanreach netbios-name list will not be able to make a connection in this router over DLSw+, whether incoming or outgoing.


Note Because the configuration of the mac-address and netbios-name keywords prevents the DLSw+ peer from exploring, a misconfiguration could prevent DLSw+ from being able to find a resource actually available elsewhere in the network.

Example

The following example indicates that this peer only has information about a single NetBIOS server, and that no peers should send this peer explorers searching for other NetBIOS names. Because the remote option is also configured, NetBIOS workstations that are connected to the NetBIOS server "lanserv" will be able to establish a DLSw+ connection:

dlsw icanreach netbios-exclusive
dlsw icanreach netbios-name lanserv

Related Commands

You can use the master indexes or search online to find documentation of related commands.

show dlsw capabilities

dlsw llc2 nornr

Use the dlsw llc2 nornr global configuration command to prevent the receiver not ready (RNR) message from being sent while establishing an LLC2 connection. Use the no form of this command to return to the default.

dlsw llc2 nornr
no dlsw llc2 nornr

Default

The command is disabled by default.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

This command is used when any device does not handle the LLC2 RNR frames.

Examples

The following example keeps the receiver not ready message from being sent when establishing an LLC2 connection.

dlsw llc2 nornr

The following is output from a Sniffer trace showing when it would be appropriate to use the dlsw llc2 nornr command because the RNR message is being rejected from the FEP when the router is trying to establish an LLC2 connection

SUMMARY  Delta T    From 400020401003                From 400023491026
8    0.173                                    LLC C D=00 S=04 TEST P
9    0.003   LLC R D=04 S=00 TEST F
10    0.002                                    SNA XID Fmt 2 T4 
11    0.059   SNA XID Fmt 2 T4 
12    0.004                                    SNA XID Fmt 2 T4 
13    0.065   SNA XID Fmt 2 T4
14    0.005                                    SNA XID Fmt 2 T4 
16    0.054   LLC C D=04 S=04 SABME P
17    0.003                                    LLC R D=04 S=04 UA 

The router sends a receiver not ready message.

18    0.001   LLC C D=04 S=04 RNR NR=0  

From frames 19 to 35, the FEP does not respond.

19    0.002   LLC C D=04 S=04 RR NR=0  
20    0.048   SNA  C NC  NC-ER-OP 
21    0.997   LLC C D=04 S=04 RR NR=0 P
22    1.000   LLC C D=04 S=04 RR NR=0 P
24    1.000   LLC C D=04 S=04 RR NR=0 P
25    1.000   LLC C D=04 S=04 RR NR=0 P
31    1.000   LLC C D=04 S=04 RR NR=0 P
32    1.000   LLC C D=04 S=04 RR NR=0 P
34    1.000   LLC C D=04 S=04 RR NR=0 P
35    1.000   LLC C D=04 S=04 RR NR=0 P

The router disconnects the circuit.

37    1.000   LLC C D=04 S=04 DISC P
38    0.002                                    LLC R D=04 S=04 UA F

The sequence repeats.

39    0.179                                    LLC C D=00 S=04 TEST P
41    0.767   SNA XID Fmt 2 T4 
42    0.634   SNA XID Fmt 2 T4 
43    0.173                                    LLC C D=00 S=04 TEST 
44    0.003   LLC R D=04 S=00 TEST F
45    0.002                                    SNA XID Fmt 2 T4 
46    0.060   SNA XID Fmt 2 T4 
47    0.004                                    SNA XID Fmt 2 T4
48    0.063   SNA XID Fmt 2 T4 
49    0.005                                    SNA XID Fmt 2 T4 

dlsw local-peer

Use the dlsw local-peer global configuration command to define the parameters of the DLSw+ local peer. Use the no form of this command to cancel the definitions.

dlsw local-peer [peer-id ip-address] [group group] [border] [cost cost]
[lf size] [keepalive seconds] [passive] [promiscuous] [biu-segment]
[init-pacing-window size] [max-pacing-window size]
no dlsw local-peer [peer-id ip-address] [group group] [border] [cost cost]
[lf size] [keepalive seconds] [passive] [promiscuous] [biu-segment]
[init-pacing-window size] [max-pacing-window size]

Syntax Description

peer-id ip-address

(Optional) Local peer IP address; required for Fast-Sequenced Transport (FST) and TCP.

group group

(Optional) Peer group number for this router. The valid range is 1 to 255.

border

(Optional) Enables as a border peer. Group option must be specified in order to use the border peer option.

cost cost

(Optional) Peer cost advertised to remote peers in the capabilities exchange. The valid range is 1 to 5.

lf size

(Optional) Largest frame size for this local peer. Valid sizes are the following:
516-516 byte maximum frame size
1470-1470 byte maximum frame size
1500-1500 byte maximum frame size
2052-2052 byte maximum frame size
4472-4472 byte maximum frame size
8144-8144 byte maximum frame size
11407-11407 byte maximum frame size
11454-11454 byte maximum frame size
17800-17800 byte maximum frame size

keepalive seconds

(Optional) Default remote peer keepalive interval in seconds. The valid range is 0 to 1200 seconds. The default is 30 seconds. The value 0 means no keepalives.

passive

(Optional) Specifies that this router will not initiate remote peer connections to configured peers.

promiscuous

(Optional) Accepts connections from nonconfigured remote peers.

biu-segment

(Optional) Causes DLSw+ to spoof the maximum receivable I-frame size in XID so that each end station sends the largest frame it can.

init-pacing-window size

(Optional) Size of the initial pacing window, as defined in RFC 1795. The valid range is 1-2000.

max-pacing-window size

(Optional) Maximum size of the pacing window, as defined in RFC 1795. The valid range is 1-2000.

Default

No parameters are defined.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

When there are multiple peers to a given destination, use the cost keyword to determine which router is preferred and which is capable. The cost keyword only applies in fault tolerance mode.

The biu-segment option is a performance/utilization improvement. If a frame that arrives from a remote peer is too large for the destination station to handle, DLSw+ segments the frame. If you choose to implement this option, you must add the option to both DLSw peer partners.

Example

The following command defines the local peer IP address and specifies the peer group number for this router:

dlsw local-peer peer-id 10.2.17.1 group 2

Related Commands

You can use the master indexes or search online to find documentation of related commands.

dlsw duplicate-path-bias
show dlsw capabilities

dlsw mac-addr

Use the dlsw mac-addr global configuration command to configure a static MAC address. Use the no form of this command to cancel the configuration.

dlsw mac-addr mac-addr {ring ring -number| remote-peer {interface serial number |
ip-address ip-address}| rif rif-string | group group}
no dlsw mac-addr mac-addr {ring ring -number| remote-peer {interface serial number |
ip-address ip-address}| rif rif-string | group group}

Syntax Description

mac-addr

Specifies the MAC address.

ring ring-number

Maps the MAC address to a ring number or ring group number. The valid range is 1 to 4095.

remote-peer

Maps the MAC address to a specific remote peer.

interface serial number

Specifies the remote peer by direct serial interface.

ip-address ip-address

Specifies the remote peer by IP address.

rif rif-string

Maps the MAC address to a local interface using a RIF string. The RIF string describes a source-routed path from the router to the MAC address. It starts at the router's ring-group and ends on the ring where the MAC address is located. The direction should be from the router toward the MAC address. See IEEE 802.5 standard for details.

group group

Maps the MAC address to a specified peer group. Valid numbers are in the range 1 to 255.

Default

No static MAC address is configured.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

You can statically define resources to prevent the Cisco IOS software from sending explorer frames for the specified resource. For example, you can include the MAC address of a FEP in the configuration for each remote router to eliminate any broadcasts that are searching for a FEP. Alternatively, you can specify a single dlsw icanreach statement in the router attached to the FEP indicating the MAC address of the FEP. This information is sent to all remote routers as part of the capabilities exchange.


Note Because the configuration of this command prevents the DLSw+ peer from exploring, a misconfiguration could prevent DLSw+ from being able to find a resource actually available elsewhere in the network.

Example

The following example maps the static MAC address 1000.5A12.3456 to the remote peer at IP address 10.17.3.2:

dlsw mac-addr 1000.5A12.3456 remote-peer ip-address 10.17.3.2

Related Commands

You can use the master indexes or search online to find documentation of related commands.

show dlsw reachability

dlsw max-multiple-rifs

Use the dlsw max-multiple-rifs global configuration command to enable caching of multiple RIFs per interface. Use the no form of this command to turn off the feature.

dlsw max-multiple-rifs multiple-rifs-per-port
no dlsw max-multiple-rifs multiple-rifs-per-port

Syntax Description

multiple-rifs-per-port

Number of multiple RIF entries per interface. The valid range is 1 to 4.

Default

The default value is 1.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3.

A MAC address or NetBIOS name can have several RIF entries. Prior to this command, DLSw+ could cache only one of these RIF entries per local Token Ring port. With the dlsw max-multiple-rifs command configured, however, DLSw+ can cache multiple RIF entries (up to 4) for a specific MAC address or NetBIOS name on one Token Ring port.

If the value 1 is specified, multiple RIF caching is not enabled.

Example

The following example enables the router to cache up to 2 RIFs per interface:

dlsw max-multiple-rifs 2

dlsw netbios-keepalive-filter

Use the dlsw netbios-keepalive-filter global configuration command to enable the NetBIOS dial-on-demand routing (DDR) feature. Use the no form of this command to turn off the feature.

dlsw netbios-keepalive-filter
no dlsw netbios-keepalive-filter

Syntax Description

This command has no arguments or keywords.

Default

Disabled

Command Mode

Global configuration

Usage Guidelines

This command first appeared in 11.2 F.

See the "Bridging and IBM Networking Overview" chapter of the Bridging and IBM Networking Configuration Guide for more details on the NetBIOS DDR feature.

Example

The following example enables NetBIOS DDR:

dlsw netbios-keepalive-filter

dlsw netbios-name

Use the dlsw netbios-name global configuration command to configure a static NetBIOS name. Use the no form of this command to cancel the configuration.

dlsw netbios-name netbios-name {ring ring-number | remote-peer {interface serial number |
ip-address ip-address}| rif rif-string | group group}
no dlsw netbios-name netbios-name {ring ring-number | remote-peer
{interface  serial  number | ip-address ip-address}| rif rif-string | group group}

Syntax Description

netbios-name

Specifies the NetBIOS name. Wildcards are allowed.

ring ring number

Maps the NetBIOS name to a ring number or ring group number. Test frames for this name will only be sent to LAN ports in this ring group.

remote-peer

Maps the NetBIOS name to a specific remote peer.

interface serial number

Specifies the remote peer by direct interface.

ip-address ip-address

Specifies the remote peer by IP address.

rif rif- string

Maps the MAC address to a local interface using a RIF string. The RIF string describes a source-routed path from the router to the MAC address. It starts at the router's ring-group and ends on the ring where the MAC address is located. The direction should be from the router towards the MAC address. See IEEE 802.5 standard for details

group group

Maps the NetBIOS name to a specified peer group. Valid numbers are in the range 1 to 255.

Default

No static NetBIOS name is configured.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.


Note Because the configuration of this command prevents the DLSw+ peer from exploring, a misconfiguration could prevent DLSw+ from being able to find a resource actually available elsewhere in the network.

Example

The following example configures a static NetBIOS name and links it to group 3:

dlsw netbios-name netname group 3

Related Commands

You can use the master indexes or search online to find documentation of related commands.

show dlsw reachability

dlsw peer-on-demand-defaults

Use the dlsw peer-on-demand-defaults global configuration command to configure defaults for peer-on-demand transport. Use the no form of this command to disable the previous assignment.

dlsw peer-on-demand-defaults [fst] [bytes-netbios-out bytes-list-name] [cost cost]
[dest-mac destination-mac-address] [dmac-output-list access-list-number]
[host-netbios-out host-list-name] [inactivity minutes] [keepalive seconds] [lf size]
[lsap-output-list list] [port-list port-list-number] [priority] [tcp-queue-max]
no dlsw peer-on-demand-defaults [fst] [bytes-netbios-out bytes-list-name] [cost cost]
[dest-mac destination-mac-address] [dmac-output-list access-list-number]
[host-netbios-out host-list-name] [inactivity minutes] [keepalive seconds] [lf size]
[lsap-output-list list] [port-list port-list-number] [priority] [tcp-queue-max]

Syntax Description

fst

(Optional) Use FST encapsulation for all peers-on-demand being established by this router.

bytes-netbios-out bytes-list-name

(Optional) Configures NetBIOS bytes output filtering for peer-on-demand peers. The bytes-list-name is the name of the previously defined netbios bytes access list filter.

cost cost

(Optional) Specifies the cost to reach peer-on-demand peers. The valid range is 1 to 5. The default cost is 3.

dest-mac destination-mac- address

(Optional) Specifies the exclusive destination MAC address for peer-on-demand peers.

dmac-output-list access- list-number

(Optional) Specifies the filter output destination MAC addresses.

host-netbios-out host-list-name

(Optional) Configures NetBIOS host output filtering for peer-on-demand peers. The host-list-name is the name of the previously defined NetBIOS host access list filter.

inactivity minutes

(Optional) Configures the length of time after the peer's circuit count is zero that the peer-on-demand is disconnected. The valid range is 0 to1440 seconds. The default is 10  minutes.

keepalive seconds

(Optional) Configures the peer-on-demand keepalive interval. The valid range is 0 to 1200 seconds. The default is 30 seconds.

lf size

(Optional) Largest frame size for this remote peer. Valid maximum frame sizes are the following:
516-516 bytes
1470-1470 bytes
1500-1500 bytes
2052-2052 bytes
4472-4472 bytes
8144-8144 bytes
11407-11407 bytes
11454-11454 bytes
17800-17800 bytes

lsap-output-list list

(Optional) Configures local service access point (LSAP) output filtering for peer-on-demand peers. Valid numbers are in the range 200 to 299.

port-list port-list-number

(Optional) Configures a port list for peer-on-demand peers. Valid numbers are in the range 0 to 4095.

priority

(Optional) Configures prioritization for peer-on-demand peers. The default state is off.

tcp-queue-max

(Optional) Configures the maximum output TCP queue size for peer-on-demand peers.

Default

The default peer-on-demand transport is TCP.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

A peer-on-demand peer is a non-configured remote-peer that was connected because of an LLC2 session established through a Border Peer DLSw+ network.

Example

The following example configures FST for peer-on-demand transport:

dlsw peer-on-demand-defaults fst

Related Commands

You can use the master indexes or search online to find documentation of related commands.

show dlsw peers

dlsw port-list

Use the dlsw port-list global configuration command to map traffic on a local interface (Token Ring or serial) to remote peers. Use the no form of this command to disable the previous map assignment.

dlsw port-list list-number type number
no dlsw port-list list-number type number

Syntax Description

list-number

Port list number. The valid range is 1 to 255.

type

Interface type.

number

Interface number.

Default

No port list is configured.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

Traffic received from a remote peer is forwarded only to the ports specified in the port list. Traffic received from a local interface is forwarded to peers if the input port number appears in the port list applied to the remote peer definition. The definition of a port list is optional.

Example

The following example configures a DLSw peer port list for Token Ring interface 1:

dlsw port-list 3 token ring 1

Related Commands

You can use the master indexes or search online to find documentation of related commands.

dlsw bgroup-list
dlsw ring-list

dlsw prom-peer-defaults

Use the dlsw prom-peer-defaults global configuration command to configure defaults for promiscuous transport. Use the no form of this command to disable the previous assignment.

dlsw prom-peer-defaults [fst] [bytes-netbios-out bytes-list-name] [cost cost]
[dest-mac destination-mac-address] [dmac-output-list access-list-number]
[host-netbios-out host-list-name] [keepalive seconds] [lf size]
[lsap-output-list list] [tcp-queue-max size]
no dlsw prom-peer-defaults [fst] [bytes-netbios-out bytes-list-name] [cost cost]
[dest-mac destination-mac-address] [dmac-output-list access-list-number]
[host-netbios-out host-list-name] [keepalive seconds] [lf size]
[lsap-output-list list] [tcp-queue-max size]

Syntax Description

bytes-netbios-out bytes-list-name

(Optional) Configures NetBIOS bytes output filtering for promiscuous peers. The bytes-list-name is the name of the previously defined NetBIOS bytes access list filter.

cost cost

(Optional) Specifies the cost to reach promiscuous peers. The valid range is 1 to 5. The default cost is 3.

dest-mac destination-mac-address

(Optional) Specifies the exclusive destination MAC address for promiscuous peers.

dmac-output-list access-list-number

(Optional) Specifies the filter output destination MAC addresses.

fst

(Optional) Use FST encapsulation for all prom peers being established by this router.

host-netbios-out host-list-name

(Optional) Configures NetBIOS host output filtering for promiscuous peers. The host-list-name is the name of the previously defined NetBIOS host access list filter.

keepalive seconds

(Optional) Configures the promiscuous keepalive interval. The valid range is 0 to 1200 seconds. The default is 30 seconds.

lf size

(Optional) Largest frame size for this promiscuous peer. Valid maximum frame sizes are the following:
516-516 bytes
1470-1470 bytes
1500-1500 bytes
2052-2052 bytes
4472-4472 bytes
8144-8144 bytes
11407-11407 bytes
11454-11454 bytes
17800-17800 bytes

lsap-output-list list

(Optional) Configures LSAP output filtering for promiscuous peers. Valid numbers are in the range 200  to  299.

tcp-queue-max size

(Optional) Configures the maximum output TCP queue size for promiscuous peers.

Default

The default prom-peer transport is TCP.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

A prom-peer is a peer not configured as a remote-peer on this DLSw+ device, but which initiated a peer connection which was accepted because promiscuous peering was enabled.

Example

The following example configures cost for promiscuous peers:

dlsw prom-peer-defaults cost 4

Related Commands

You can use the master indexes or search online to find documentation of related commands.

show dlsw capabilities

dlsw remote-peer frame-relay

Use the dlsw remote-peer frame-relay global configuration command to specify the remote peer with which the router will connect. Use the no form of this command to disable the previous assignments.

dlsw remote-peer list-number frame-relay interface serial number dlci-number
[backup-peer [ip-address | frame-relay interface serial number dlci-number |
interface name]] [bytes-netbios-out bytes-list-name] [cost cost] [dest-mac mac-address]
[dmac-output-list  access-list-number] [host-netbios-out  host-list-name]
[keepalive  seconds] [lf size] [linger minutes] [lsap-output-list list] [passive]
pass-thru
no
dlsw remote-peer list-number frame-relay interface serial number dlci-number
[backup-peer [ip-address | frame-relay interface serial number dlci-number |
interface  name]] [bytes-netbios-out bytes-list-name] [cost cost] [dest-mac mac-address]
[dmac-output-list  access-list-number] [host-netbios-out host-list-name]
[keepalive  seconds] [lf size] [linger minutes] [lsap-output-list list] [passive]
pass-thru

Syntax Description

list-number

Ring list number. The valid range is 1 to 255. The default is 0, which means DLSw+ forwards explorers over all ports or bridge groups on which DLSw+ is enabled.

interface serial number

Serial interface number of the remote peer with which the router is to communicate.

dlci-number

DLCI number of the remote peer.

backup-peer ip-address

(Optional) IP address of the existing TCP/FST peer for which this peer is the backup peer.

backup-peer frame-relay interface serial number dlci-number

(Optional) Serial interface and DLCI number of the existing Direct /LLC2 frame-relay peer for which this peer is the backup peer.

backup-peer interface name

(Optional) Interface name of the existing direct peer for which this peer is the backup peer.

bytes-netbios-out bytes-list-name

(Optional) Configures NetBIOS bytes output filtering for this peer. The bytes-list-name argument is the name of the previously defined NetBIOS bytes access list filter.

cost cost

(Optional) Cost to reach this remote peer. The valid range is 1 to 5.

dest-mac mac-address

(Optional) Permits the connection to be established only when there is an explorer frame destined for the specified 48-bit MAC address written in dotted triplet form.

dmac-output-list access-list-number

(Optional) Permits the connection to be established only when the explorer frame passes the specified access list. The access-list-number is the list number specified in the access-list command.

host-netbios-out host-list-name

(Optional) Configures NetBIOS host output filtering for this peer. The host-list-name is the name of the previously defined NetBIOS host access list filter.

keepalive seconds

(Optional) Sets the keepalive interval for this remote peer. The range is 0 to 1200 seconds.

lf size

(Optional) Largest frame size, in bytes, this local peer will use on a circuit to avoid segmented frames. Valid sizes are 516, 1470, 1500, 2052, 4472, 8144, 11407, 11454, and 17800 bytes.

linger minutes

(Optional) Configures length of time the backup peer remains connected after the primary peer connection is reestablished. The valid range is 1 to 300 minutes. The default is 5 minutes.

lsap-output-list list

(Optional) Filters output IEEE 802.5 encapsulated packets. Valid access list numbers are in the range 200  to  299.

passive

(Optional) Designates this remote peer as passive.

pass-thru

Selects passthrough mode. The default is local acknowledgment mode.

Default

No remote peers are specified.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0. The following keywords and arguments first appeared in Cisco IOS Release 11.2: dest-mac mac-address, dmac-output-list  access-list-number, and linger minutes.

The cost keyword specified in a remote peer statement takes precedence over the cost learned as part of the capabilities exchange with the remote peer. The cost keyword is relevant only in fault tolerance mode.

When you need to permit access to only a single MAC address, the dest-mac option is a shortcut over the dmac-output-list option.

When pass-thru is not specified, traffic will be locally acknowledged and reliably transported in LLC2 across the WAN.

Examples

The following example specifies a DLSw+ Lite peer as a backup to a primary direct peer:

dlsw remote-peer 0 frame-relay interface serial 1 40 pass-thru
dlsw remote-peer 0 frame-relay interface serial 0 30 backup-peer frame-relay interface 
serial 1 40

The following example specifies Frame Relay encapsulation connection for remote peer transport:

dlsw remote-peer 0 frame-relay interface 0 30

Related Commands

You can use the master indexes or search online to find documentation of related commands.

show dlsw peers

dlsw remote-peer fst

Use the dlsw remote-peer fst global configuration command to specify an FST encapsulation connection for remote peer transport. Use the no form of this command to disable the previous FST assignments.

dlsw remote-peer list-number fst ip-address [backup-peer [ip-address | frame-relay
interface serial
number dlci-number | interface name]]
[bytes-netbios-out  bytes-list-name] [cost cost] [dest-mac mac-address]
[dmac-output-list  access-list-number] [host-netbios-out host-list-name]
[keepalive  seconds] [lf size] [linger minutes] [lsap-output-list list] [passive]
no dlsw remote-peer list-number fst ip-address [backup-peer [ip-address | frame-relay
interface serial
number dlci-number | interface name]]
[bytes-netbios-out  bytes-list-name] [cost cost] [dest-mac mac-address]
[dmac-output-list  access-list-number] [host-netbios-out host-list-name]
[keepalive  seconds] [lf size] [linger minutes] [lsap-output-list list] [passive]

Syntax Description

list-number

Ring list number. The valid range is 1 to 255. The default is  0, which means DLSw+ forwards explorers over all ports or bridge groups on which DLSw+ is enabled.

ip-address

IP address of the remote peer with which the router is to communicate.

backup-peer ip-address

(Optional) IP address of the existing TCP/FST peer for which this peer is the backup peer.

backup-peer frame-relay-interface serial number dlci-number

(Optional) Serial interface and DLCI number of the existing Direct /LLC2 frame-relay peer for which this peer is the backup peer.

backup-peer interface name

(Optional) Interface name of the existing direct peer for which this peer is the backup peer.

bytes-netbios-out bytes-list-name

(Optional) Configures NetBIOS bytes output filtering for this peer. The bytes-list-name argument is the name of the previously defined NetBIOS bytes access list filter.

cost cost

(Optional) Cost to reach this remote peer. The valid range is 1 to 5.

dest-mac mac-address

(Optional) Permits the connection to be established only when there is an explorer frame destined for the specified 48-bit MAC address written in dotted triplet form.

dmac-output-list access-list-number

(Optional) Permits the connection to be established only when the explorer frame passes the specified access list. The access-list-number is the list number specified in the access-list command.

host-netbios-out host-list-name

(Optional) Configures NetBIOS host output filtering for this peer. The host-list-name is the name of the previously defined NetBIOS host access list filter.

keepalive seconds

(Optional) Sets the keepalive interval for this remote peer. The range is 0 to 1200 seconds.

lf size

(Optional) Largest frame size this local peer will use on a circuit to avoid segmented frames. Valid sizes are 516, 1470, 1500, 2052, 4472, 8144, 11407, 11454, and 17800 bytes.

linger minutes

(Optional) Configures length of time the backup peer remains connected after the primary peer connection is reestablished. The valid range is 1 to 300 minutes. The default is 5 minutes.

lsap-output-list list

(Optional) Filters output IEEE 802.5 encapsulated packets. Valid access list numbers are in the range 200  to  299.

passive

(Optional) Designates this remote peer as passive.

Default

No FST encapsulation connection is specified.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3. The following keywords and arguments first appeared in Cisco IOS Release 11.2: dest-mac mac-address, dmac-output-list  access-list-number, and linger minutes.

The cost keyword specified in a remote peer statement takes precedence over the cost learned as part of the capabilities exchange with the remote peer. The cost keyword is relevant only in fault tolerance mode.

When you need to permit access to a single MAC address, the dest-mac option is a shortcut over the dmac-output-list option.

Examples

The following example specifies an FST peer as backup to a primary TCP peer:

dlsw remote-peer 0 tcp 10.2.18.1
dlsw remote-peer 1 fst 10.2.17.8 backup-peer 10.2.18.1

The following example specifies an FST encapsulation connection for remote peer transport:

dlsw remote-peer 1 fst 10.2.17.8

Related Commands

You can use the master indexes or search online to find documentation of related commands.

show dlsw peers

dlsw remote-peer interface

Use the dlsw remote-peer interface global configuration command when specifying a point-to-point direct encapsulation connection. Use the no form of this command to disable previous interface assignments.

dlsw remote-peer list-number interface serial number [backup-peer [ip-address | frame-relay
interface serial
number dlci-number | interface name]] [bytes-netbios-out bytes-list-name]
[cost cost] [dest-mac mac-address] [dmac-output-list  access-list-number]
[host-netbios-out host-list-name] [keepalive  seconds] [lf size] [linger minutes]
[lsap-output-list list] [passive] [pass-thru]
no dlsw remote-peer list-number interface serial number [backup-peer [ip-address |
frame-relay interface serial number dlci-number | interface name]]
[bytes-netbios-out  bytes-list-name] [cost cost] [dest-mac mac-address]
[dmac-output-list  access-list-number] [host-netbios-out host-list-name]
[keepalive  seconds] [lf size] [linger minutes] [lsap-output-list list] [passive]
[pass-thru]

Syntax Description

list-number

Ring list number. The valid range is 1 to 255. The default is 0, which means all.

serial number

Specifies the remote peer by direct serial interface.

backup-peer ip-address

(Optional) IP address of the existing TCP/FST peer for which this peer is the backup peer.

backup-peer frame-relay interface serial number dlci-number

(Optional) Serial interface and DLCI number of the existing Direct /LLC2 frame-relay peer for which this peer is the backup peer.

backup-peer interface name

(Optional) Interface name of the existing direct peer for which this peer is the backup peer.

bytes-netbios-out bytes-list-name

(Optional) Configures NetBIOS bytes output filtering for this peer. The bytes-list-name argument is the name of the previously defined NetBIOS bytes access list filter.

cost cost

(Optional) Cost to reach this remote peer. The valid range is 1  to 5.

dest-mac mac-address

(Optional) Permits the connection to be established only when there is an explorer frame destined for the specified 48-bit MAC address written in dotted triplet form.

dmac-output-list access-list-number

(Optional) Permits the connection to be established only when the explorer frame passes the specified access list. The access-list-number is the list number specified in the access-list command.

host-netbios-out host-list-name

(Optional) Configures NetBIOS host output filtering for this peer. The host-list-name is the name of the previously defined NetBIOS host access list filter.

keepalive seconds

(Optional) Sets the keepalive interval for this remote peer. The range is 0 to 1200 seconds.

lf size

(Optional) Largest frame size, in bytes, this local peer will use on a circuit to avoid segmented frames. Valid sizes are 516, 1470, 1500, 2052, 4472, 8144, 11407, 11454, and 17800 bytes.

linger minutes

(Optional) Configures length of time the backup peer remains connected after the primary peer connection is reestablished. The valid range is 1 to 300 minutes. The default is 5 minutes.

lsap-output-list list

(Optional) Filters output IEEE 802.5 encapsulated packets. Valid access list numbers are in the range 200  to  299.

passive

(Optional) Designates this remote peer as passive.

pass-thru

(Optional) Selects passthrough mode. The default is local acknowledgment mode.

Default

No point-to-point direct encapsulation connection is specified.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3. The following keywords and arguments first appeared in Cisco IOS Release 11.2: dest-mac mac-address, dmac-output-list  access-list-number, and linger minutes.

The cost keyword specified in a remote peer statement takes precedence over the cost learned as part of the capabilities exchange with the remote peer. The cost keyword is relevant only in fault tolerance mode.

When you need to permit access to a single MAC address only, the dest-mac option is a shortcut over the dmac-output-list option.

Examples

The following example specifies a point-to-point direct peer backup to a primary direct peer:

dlsw remote-peer 0 interface serial 1 pass-thru
dlsw remote-peer 1 interface serial 2 pass-thru backup-peer interface serial 1

The following example specifies a point-to-point direct encapsulation connection for remote peer transport:

dlsw remote-peer 1 interface serial 2 pass-thru

Related Commands

You can use the master indexes or search online to find documentation of related commands.

show dlsw peers

dlsw remote-peer tcp

Use the dlsw remote-peer tcp global configuration command to identify the IP address of a peer with which to exchange traffic using TCP. Use the no form of this command to remove a remote peer.

dlsw remote-peer list-number tcp ip-address [backup-peer [ip-address | frame-relay
interface serial
number dlci-number | interface name]] [bytes-netbios-out bytes-list-name]
[cost  cost] [dest-mac mac-address] [dmac-output-list  access-list-number] [dynamic]
[host-netbios-out host-list-name] [inactivity minutes] [dynamic] [keepalive seconds]
[lf  size] [linger  minutes] [lsap-output-list list] [no-llc minutes] [passive] [priority]
[rif-passthru virtual-ring-number] [tcp-queue-max  size] [timeout seconds]
no dlsw remote-peer list-number tcp ip-address [backup-peer [ip-address | frame-relay
interface serial
number dlci-number | interface name]] [bytes-netbios-out bytes-list-name]
[cost cost] [dest-mac mac-address] [dmac-output-list  access-list-number] [dynamic]
[host-netbios-out host-list-name] [inactivity minutes] [dynamic] [keepalive seconds]
[lf size] [linger  minutes] [lsap-output-list list] [no-llc minutes] [passive] [priority]
[rif-passthru virtual-ring-number] [tcp-queue-max size] [timeout seconds]

Syntax Description

list-number

Remote peer ring group list number. This ring group list number default is 0. Otherwise, this value must match the number you specify with the dlsw ring-list, dlsw port-list or dlsw bgroup-list command.

tcp ip-address

IP address of the remote peer with which the router is to communicate.

backup-peer ip-address

(Optional) IP address of the existing TCP/FST peer for which this peer is the backup peer.

backup-peer frame-relay interface serial number dlci-number

(Optional) Serial interface and DLCI number of the existing Direct /LLC2 frame-relay peer for which this peer is the backup peer.

backup-peer interface name

(Optional) Interface name of the existing direct peer for which this peer is the backup peer.

bytes-netbios-out bytes-list-name

(Optional) Configures NetBIOS bytes output filtering for this peer. The bytes-list-name argument is the name of the previously defined NetBIOS bytes access list filter.

cost cost

(Optional) The cost to reach this remote peer. The valid range is 1 to 5.

dest-mac mac-address

(Optional) Permits the TCP connection to be established only when there is an explorer frame destined for the specified 48-bit MAC address written in dotted triplet form.

dmac-output-list access-list-number

(Optional) Permits the TCP connection to be established only when the explorer frame passes the specified access list. The access-list-number is the list number specified in an access-list command.

dynamic

(Optional) Permits the TCP connection to be established only when there is DLSw+ data to send.

host-netbios-out host-list-name

(Optional) Configures NetBIOS host output filtering for this peer. The host-list-name is the name of the previously defined NetBIOS host access list filter.

inactivity minutes

(Optional) Configures the length of time a connection can be idle before closing the dynamic remote peer connection. The valid range is 1 to 300 minutes. The default is 5  minutes.

keepalive seconds

Sets the keepalive interval for this remote peer. The range is 0 to 1200 seconds.

lf size

(Optional) Largest frame size, in bytes, this local peer will use on a circuit to avoid segmented frames. Valid sizes are 516, 1470, 1500, 2052, 4472, 8144, 11407, 11454, and 17800 bytes.

linger minutes

(Optional) Configures length of time the backup peer remains connected after the primary peer connection is reestablished. The valid range is 1 to 300 minutes. The default is 5 minutes.

lsap-output-list list

(Optional) Filters output IEEE 802.5 encapsulated packets. Valid access list numbers are in the range 200  to  299.

no-llc minutes

(Optional) Configures the length of time a remote peer remains connected after all LLC2 connections are gone. The valid range is 1 to 300 minutes. The default is 5  minutes.

passive

(Optional) Designates this remote peer as passive.

priority

(Optional) Enables prioritization features for this remote peer. Valid TCP port numbers are the following:

· High: 2065

· Medium: 1981

· Normal: 1982

· Low: 1983

rif-passthru virtual-ring-number

(Optional) Configures the remote peer as RIF-passthru. The virtual-ring-number value is the same number as the ring number value assigned in the source-bridge ring-group commands of the DLSw+ Passthru peers.

tcp-queue-max size

(Optional) Maximum output TCP queue size for this remote peer. The valid maximum TCP queue size is a number in the range 10 to 2000.

timeout seconds

(Optional) Configures the retransmit time limit for TCP. The valid range is 5 to 1200 seconds. The default is 90  seconds.

Defaults

No peer IP address is identified.

The linger option is inactive. If the linger option is added with no minutes specified, the default is 5  minutes.

The dynamic option is not on by default. If the dynamic option is added without either the inactivity or no-llc argument specified, the default is to terminate the TCP connection to the remote peer after 5 minutes of no active LLC2 connection.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3. The following keywords and arguments first appeared in Cisco IOS Release 11.1: dynamic, inactivity minutes, linger minutes, no-llc  minutes and timeout seconds. The following keywords and arguments first appeared in Cisco  IOS Release 11.2: dest-mac mac-address, dmac-output-list  access-list-number, linger minutes.

SNA DDR technology allows switched links to be closed during idle periods. To enable this feature, set the keepalive option to 0 and configure the timeout option. When the dynamic option is configured, the keepalive option is automatically set to 0.

To enhance DDR cost-savings, you can configure the TCP connection to a remote peer to be dynamically established (that is, established only when there is DLSw data to send). You can further configure the TCP connection to terminate after a specified period of idle time on the peer or after a specified period of no active LLC sessions on the peer.

You cannot use both no-llc and inactivity in a command specifying a dynamic peer.

When you need to permit access to a single MAC address, the dest-mac option is a shortcut over the dmac-output-list option.

Use the linger option to specify that a backup peer will remain connected for a specified period of time after the primary connection is gone.

When the priority option on the dlsw remote-peer command is configured, DLSw+ automatically activates four TCP ports to that remote peer (ports 2065, 1981, 1982 and 1983) and assigns traffic to specific ports. Furthermore, if APPN is running with DLSw+ and you specify the priority option on the dlsw remote-peer command, then the SNA TOS will map APPN class of service (COS) to TCP TOS and will preserve the APPN COS characteristics throughout the network.

The rif passthru option works only on Token Ring LANs via SRB. Other LAN types, such as SDLC and QLLC, are not supported. The RIF Passthru feature is supported with TCP encapsulation and it disables local acknowledgment.

The following features are not supported with the DLSw+ RIF Passthru feature:

Examples

The following example specifies a TCP encapsulation connection for remote peer transport:

dlsw remote-peer 0 tcp 10.2.17.8

The following example specifies a TCP peer as backup to a primary FST peer:

dlsw remote-peer 0 fst 10.2.18.9
dlsw remote-peer 0 tcp 10.2.17.8 backup-peer 10.2.18.9

Related Commands

You can use the master indexes or search online to find documentation of related commands.

show dlsw peers

dlsw ring-list

Use the dlsw ring-list to configure a ring list, mapping traffic on a local interface to remote peers. Use the no form of this command to cancel the definition.

dlsw ring-list list-number rings ring-number
no dlsw ring-list list-number rings ring-number

Syntax Description

list-number

Ring list number. The valid range is 1 to 255.

rings

Specify one or more physical or virtual rings.

ring-number

Physical or virtual ring number. The valid range is 1 to 4095.

Default

There is no default setting.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

Traffic received from a remote peer is forwarded only to the rings specified in the ring list. Traffic received from a local interface is forwarded to peers if the input ring number appears in the ring list applied to the remote peer definition. The definition of a ring list is optional.

Example

The following example configures a DLSw ring list, assigning rings 1, 2, and 3 to ring list 3:

dlsw ring-list 3 rings 1 2 3

Related Commands

You can use the master indexes or search online to find documentation of related commands.

dlsw port-list
dlsw remote-peer frame-relay
show dlsw capabilities

dlsw timer

Use the dlsw timer global configuration command to tune an existing configuration parameter. Use the no form of this command to restore the default parameters.

dlsw timer {icannotreach-block-time | netbios-cache-timeout | netbios-explorer-timeout |
netbios-group-cache | netbios-retry-interval | netbios-verify-interval |
sna-cache-timeout | explorer-delay-time | sna-explorer-timeout | explorer-wait-time |
sna-group-cache | sna-retry-interval | sna-verify-interval} time
no dlsw timer {icannotreach-block-time | netbios-cache-timeout |
netbios-explorer-timeout  | netbios-group-cache | netbios-retry-interval |
netbios-verify-interval | sna-cache-timeout | explorer-delay-time | sna-explorer-timeout
| explorer-wait-time | sna-group-cache | sna-retry-interval | sna-verify-interval} time

Syntax Description

icannotreach-block-time

Cache life of unreachable resource; during this time searches for the resource are blocked. The valid range is 1 to 86400 seconds. The default is 0 (disabled).

netbios-cache-timeout

Cache life of NetBIOS name location for the local and remote reachability caches. The valid range is 1 to 86400  seconds. The default is 960 seconds (16 minutes).

netbios-explorer-timeout

Length of time that the Cisco IOS software waits for an explorer response before marking a resource unreachable (on both a LAN and a WAN). The valid range is 1  to  86400  seconds. The default is 6  seconds.

netbios-group-cache

Cache life of NetBIOS entries in the group cache. The valid range is 1 to 86000 seconds. The default is 240 seconds (4  minutes).

netbios-retry-interval

NetBIOS explorer retry interval (on a LAN only). The valid range is 1 to 86400 seconds. The default is 1  second.

netbios-verify-interval

Number of seconds between a cache entry's creation and its marking as stale. If a search request comes in for a stale cache entry, a directed verify query is sent to ensure the cache still exists. The valid range is 1 to 86400 seconds. The default is 240 seconds (4  minutes).

sna-cache-timeout

Length of time that an SNA MAC/service access point (SAP) location cache entry exists before it is discarded (for local and remote caches). The valid range is 1  to 86400 seconds. The default is 960  seconds (16  minutes).

explorer-delay-time

Time to wait before sending or accepting explorers. The valid range is 1  to 5 minutes. The default is 0.

sna-group-cache

Cache life of SNA entries in the group cache. The valid range is 1 to 86000 seconds. The default is 240 seconds (4  minutes).

sna-explorer-timeout

Length of time that the Cisco IOS software waits for an explorer response before marking a resource unreachable (on a LAN and WAN). The valid range is 1 to 86400 seconds. The default is 180 seconds (3 minutes).

explorer-wait-time

Time to wait for all stations to respond to explorers. The valid range is 1  to 86400 seconds. The default is 0.

sna-retry-interval

Interval between SNA explorer retries (on a LAN). The valid range is 1 to 86400 seconds. The default is 30  seconds.

sna-verify-interval

Number of seconds between a cache entry's creation and its marking as stale. If a search request comes in for a stale cache entry, a directed verify query is sent to ensure that the cache still exists. The valid range is 1 to 86400 seconds. The default is 240  seconds (4 minutes).

Default

The default settings of each timer option is described in the Syntax Description of the dlsw timer command.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

The netbios-group-cache and sna-group-cache options were added to this command for the border peer caching feature.

Examples

The following configuration defines the length of time that an entry will stay in the group cache as 120 seconds (2 minutes):

dlsw timers sna-group-cache 120

The following example configures the length of time that an SNA MAC location cache entry exists before it is discarded:

dlsw timer sna-cache-timeout 3

dlsw tos disable

Use the dlsw tos disable global configuration command to disable any tos bits in DLSw+ generated packets.

dlsw tos disable

Syntax Description

This command has no arguments or keywords.

Default

There is no default setting.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 12.0.

Example

The following example disables the tos bits in DLSw+ generated packets:

dlsw tos disable

dlsw tos map

Use the dlsw tos map global configuration command to associate a TOS value for priority peers. Use the no form of this command to return to the default setting.

dlsw tos map [ high value [ medium value | normal value | low value ]]
no dlsw tos map [ high
value [ medium value | normal value | low value ]]

Syntax Description

value

The type of service TOS bit value. Valid ranges are 0-7.

Default

The default setting, with priority peers configured, is defined in Table 30.

Command Mode

Global configuration

Usage Guidelines

By default, DLSw+ peer traffic is set to Critical-ECP. When the priority keyword is specified in the dlsw remote peer tcp command, DLSw+ automatically activates four TCP ports to that remote peer (ports 2065, 1981, 1982 and 1983) and associates a priority level. This command enables the user to customize the prioritization of DLSw+ traffic within the network. If priority peers are not configured, however, high is the only option. See Table 30 for corresponding priority levels and options.


Table 30: Priority Levels and Options
TOS Bit Value DLSw+ Translation Value TOS Bit Value Meaning TCP Port Numbers

0

Routine

1

Priority

2

Immediate

Low

1983

3

Flash

Normal

1982

4

Flash Override

Medium

1981

5

Critical ECP

High

2065

6

Internetwork Control

7

Network Control

TOS bit values 6 and 7 are not recommended for usage because of potential interference with critical network infrastructure flows. Although using TOS bit values 0 and 1 will not cause negative impact to the network, the values do not prioritize the traffic.

Examples

The following example changes the default setting on IP packets generated by DLSw+ from high to low:

dlsw tos map low 2

The following is an example policy routing configuration that shows how to modify the default setting of TCP port 2065. The configuration changes the default setting on IP packets from network control priority to routine priority.

ip local policy route-map test
access-list 101 permit tcp any eq 2065 any
access-list 101 permit tcp any any eq 2065
route-map test permit 20
  match ip address 101
set ip precedence routine

dlsw udp-disable

Use the dlsw udp-disable global configuration command to disable the UDP unicast feature. Use the no form of this command to return to the default UDP unicast feature.

dlsw udp-disable
no dlsw udp-disable

Syntax Description

This command has no arguments or keywords.

Default

The UDP unicast feature is enabled.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.2 F.

If the dlsw udp-disable command is configured, then a DLSw+ node will not send packets via UDP Unicast and will not advertise UDP Unicast support in its capabilities exchange message.

Refer to the "Bridging and IBM Networking Overview" chapter of the Bridging and IBM Networking Configuration Guide for more information on the UDP Unicast feature.

Example

The following example disables the UDP unicast feature:

dlsw udp-disable

qllc dlsw

Use the qllc dlsw interface configuration command to enable DLSw+ over Qualified Logical Link Control (QLLC). Use the no form of this command to cancel the configuration.

qllc dlsw {subaddress subaddress | pvc pvc-low [pvc-high]} [vmac vmacaddr
[poolsize]] [partner partner-macaddr] [sap ssap dsap] [xid xidstring] [npsi-poll]
no qllc dlsw {subaddress subaddress | pvc pvc-low [pvc-high]} [vmac vmacaddr
[poolsize]] [partner partner-macaddr] [sap ssap dsap] [xid xidstring] [npsi-poll]

Syntax Description

subaddress subaddress

An X.121 subaddress.

pvc

Map one or more permanent virtual circuits (PVCs) to a particular QLLC service (in this case DLSw+). QLLC will attempt to reach the partner by sending and ID.STN.IND to DLSw+.

pvc-low

Lowest logical channel number (LCN) for a range of X.25 PVCs. Acceptable values for PVCs are decimal numbers between 1 and 4095. There is no default value.

pvc-high

(Optional) Highest LCN. If not specified the range of PVCs consists of just one PVC.

vmac vmacaddr

(Optional) Defines either the only virtual MAC address used for DLSw+ or the lowest virtual MAC address in a pool of virtual MAC addresses.

poolsize

(Optional) Specify the number of contiguous virtual MAC addresses that have been reserved for DLSw+. If the parameter is not present, then just one virtual MAC address is available.

partner partner-macaddr

Virtual MAC address to which an incoming call wishes to connect. The qllc dlsw command must be repeated for each different partner. Each partner is identified by a unique subaddress.

sap ssap dsap

Overrides the default SAP values (04) for a Token Ring connection. dsap refers to the partner's SAP address; ssap applies to the virtual MAC address that corresponds to the X.121 device.

xid xidstring

XID format 0 type 2 string.

npsi-poll

Inhibits forwarding a null XID on the X.25 link. Instead the Cisco IOS software will send a null XID response back to the device that sent the null XID command.

Default

No defaults are specified.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

Any incoming call whose X.121 destination address matches the router's X.121 address and this subaddress will be dispatched to DLSw+ (with an ID.STN IND). If a router is providing several QLLC services different subaddresses must be used to discriminate between them. Subaddresses can be used even if a remote X.25 device is not explicitly mapped to a specific virtual MAC address. This is most useful when PU 2.1 devices are connecting to a host because the X.25 device's control point name and network name are used to validate the connection, rather than some virtual MAC address. The subaddress is optional. If no subaddress is provided, any incoming call that matches the router's X.121 address will be dispatched to DLSw+. On outgoing calls the subaddress is concatenated to the interface's X.121 address.

When DLSw+ receives a Can You Reach inquiry about a virtual MAC address in the pool, the QLLC code will attempt to set up a virtual circuit to the X.121 address that maps to the virtual MAC address specified. If an incoming call is received, QLLC sends an ID.STN.IND with a virtual MAC address from the pool to DLSw+. If there is no virtual MAC address, then the x25 map qllc or x25 pvc qllc command must provide a virtual MAC address.

The npsi-poll parameter is needed to support PU 2.0 on the partner side that wishes to connect to a FEP on the X.25 side. In a Token Ring or DLSw+ environment the PU 2.0 will send a null XID to the FEP. If the software forwards this null XID to an X.25 attached FEP the FEP will assume that it is connecting to PU2.1, and will break off the connection when the PU 2.0 next send an XID Format 0 Type 2.

Example

The following commands assign virtual MAC address 1000.0000.0001 to a remote X.25-attached 3174, which is then mapped to the X.121 address of the 3174 (31104150101) in an X.25-attached router:

interface serial 0
  x25 address 3110212011
  x25 map qllc 1000.000.0001 31104150101
  qllc dlsw partner 4000.1161.1234

sdlc dlsw

Use the sdlc dlsw interface configuration command to attach SDLC addresses to DLSw+. Use the no form of this command to cancel the configuration.

sdlc dlsw {sdlc-address | default | partner mac-address [inbound | outbound]}
no sdlc dlsw {sdlc-address | default | partner mac-address [inbound | outbound]}

Syntax Description

sdlc-address

SDLC addresses are in hexadecimal. The valid range is 1 to FE.

default

Allows the user to configure an unlimited number of SDLC addresses to DLSw+.

partner mac-address

MAC address for default partner

inbound

(Optional) Partner will initiate connection.

outbound

(Optional) Initiate connection to partner.

Default

No correspondence is defined between SDLC addresses and DLSw+.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

Examples

The following command attaches SDLC address d2 to DLSw+:

sdlc dlsw d2

The following command attaches SDLC addresses d2, d5, e3, e4, e6, b1, c3, d4, a1 and a5:

sdlc dlsw d2 d5 e3 e4 e6 b1 c3 d4 a1 a5

Related Commands

You can use the master indexes or search online to find documentation of related commands.

encapsulation sdlc
sdlc address
sdlc role

show dlsw capabilities

Use the show dlsw capabilities privileged EXEC command to display the configuration of a specific peer or all peers.

show dlsw capabilities [interface type number | ip-address ip-address | local]

Syntax Description

interface type number

(Optional) Specifies the interface type and number for which the DLSw+ capabilities are to be displayed.

ip-address ip-address

(Optional) Specifies a peer by its IP address.

local

(Optional) Specifies the local DLSw+ peer.

Command Mode

Privileged EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

Sample Display

The following is sample output from the show dlsw capabilities command:

Router# show dlsw capabilities
DLSw: Capabilities for peer 1.1.1.6(2065)
	 	 vendor id (OUI)         : '00C' (cisco)
  version number          : 1
  release number          : 0
  init pacing window      : 20
  unsupported saps        : none
  num of tcp sessions     : 1
  loop prevent support    : no
  icanreach mac-exclusive : no
  icanreach netbios-excl. : no
  reachable mac addresses : none
  reachable netbios names : none
  cisco version number    : 1
  peer group number       : 0
  border peer capable     : no
  peer cost               : 3
  biu-segment configured  : no
  UDP Unicast support     : yes 
  local-ack configured    : yes
  priority configured     : no
  configured ip address   : 1.1.1.6
  peer type               : conf
  version string          : 
Cisco Internetwork Operating System Software 
IOS (tm) RSP Software (RSP-JSV-M), Version 11.3(4), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-1998 by cisco Systems, Inc.
Compiled Tue 16-Jun-98 04:29 by phanguye

Table 31 describes significant fields shown from the show dlsw capabilities command.


Table 31: Show DLSw Capabilities Field Descriptions
Field Description

vendor id (OUI)

Vendor ID.

version number

RFC 1795 version of SSP protocol.

release number

RFC 1795 release of SSP protocol

init pacing window

Initial pacing window.

unsupported saps

Unsupported SAPs.

num of tcp sessions

Number of TCP sessions.

loop prevent support

No loop prevent support.

icanreach mac-exclusive

Configured MAC addresses that the router can reach

icanreach netbios-excl.

Configured NetBIOS names that the router can reach

reachable mac addresses

Reachable MAC addresses.

reachable netbios name

Reachable NetBIOS names.

cisco version number

Cisco version number.

peer group number

Peer group member number.

border peer capable

Border peer capability.

peer cost

Peer cost.

biu-segment configured

BIU segment configured.

UDP Unicast support

UDP unicast support.

local-ack configured

Local acknowledgment capable.

priority configured

Priority capability.

configured ip address

Configured IP address.

peer type

Peer type can be peer-on-demand or promiscuous.

version string

Cisco IOS software version information.

show dlsw circuits

Use the show dlsw circuits privileged EXEC command to display the state of all circuits involving this MAC address as a source and destination.

show dlsw circuits [detail] [mac-address address | sap-value value | circuit id]

Syntax Description

detail

(Optional) Display circuit state information in expanded format.

mac-address address

(Optional) Specifies the MAC address to be used in the circuit search.

sap-value value

(Optional) Specifies the SAP to be used in the circuit search.

circuit id

(Optional) Specifies the circuit ID of the circuit index.

Command Mode

Privileged EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

Sample Displays

The following is sample output from the show dlsw circuits command:

Router# show dlsw circuits 
Index           local addr(lsap)    remote addr(dsap)  state          uptime
4060086272      4000.0000.0056(F0)  4001.0000.0049(F0) CONNECTED      00:00:13
Total number of circuits connected: 1

The following is sample output from the show dlsw circuits command with the detail argument:

Router# show dlsw circuits detail
Index      local addr(lsap)        remote addr(dsap)      state uptime
194  0800.5a9b.b3b2(F0)    0800.5ac1.302d(F0)    CONNECTED	 00:00:13
                PCEP: 995AA4          UCEP: A52274
                Port: To0/0            peer 172.18.15.166(2065)
                Flow-Control-Tx CW:20,  Permitted:28;  Rx CW:22, Granted:25
                RIF = 0680.0011.0640
Total number of circuits connected: 1

Table 32 describes significant fields shown in the display.


Table 32: Show DLSw Circuits Field Descriptions
Field Description

Index

Number the software uses to reference an individual circuit.

local addr (lsap)

MAC address and SAP value used by end station closest to this DLSw+ peer.

remote addr (dsap)

MAC address and SAP value used by end station that is across the peer connection (remote).

state

Indicates whether circuit has completed establishment.

uptime

Length of time a circuit has been connected.

total number of circuits connected

Number of total connected circuits. If a circuit has not completed connection, it will not show a value.

show dlsw fastcache

Use the show dlsw fastcache privileged EXEC command to display the fast cache for FST and direct-encapsulated peers.

show dlsw fastcache

Syntax Description

This command has no arguments or keywords.

Command Mode

Privileged EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

Sample Display

The following is sample output from the show dlsw fastcache command with an FST peer:

Router# show dlsw fastcache
    peer              local-mac      remote-mac   l/r sap rif
FST 10.2.32.1       0800.5a8f.881c 0800.5a8f.8822  04/04  0680.02D5.1360

The following is sample output from the show dlsw fastcache command:

Router# show dlsw fastcache
    peer              local-mac      remote-mac   l/r sap rif
IF Se1 		0800.5a8f.881c 	 0800.5a8f.8822 F0/F0 0680.02D5.1360

Table 33 describes significant fields shown in the display.


Table 33: Show DLSw+ Fastcache Field Descriptions
Field Description

peer

The peer in which the router is connected. Could represent either an IP address or interface.

local-mac

Local MAC address

remote-mac

Remote MAC address

l/r sap

Local/remote SAP value.

rif

RIF value.

show dlsw peers

Use the show dlsw peers privileged EXEC command to display DLSw peer information.

show dlsw peers [interface type number | ip-address ip-address | udp]

Syntax Description

interface typenumber

(Optional) Specifies the interface type and number for which the DLSw+ peer information is to be displayed.

ip-address ip-address

(Optional) Specifies a remote peer by its IP address.

udp

(Optional) Shows UDP frame forwarding statistics for specified peers.

Command Mode

Privileged EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

Sample Displays

The following is sample output from the show dlsw peers command:

Router# show dlsw peers udp
Peers: 		 tot-Q'd  	 	 	 total-rx  total-tx  	 	 tot-retx  	tot-drop curr-Q'd TCP uptime
1.1.1. 	 	 	 0		 	 	 	 	 	 	 	 	 	 	 	 23	 	 	 	 	 	 	 	 	0	 	 	 	 	 	 	 	 	 	 	 	0	 	 	 	 	 	 	 	 	 	 0	 	 	 	 	 	 	 	0	 	 	 	 	 	 	0	 	00:01:02
Total number of connected peers: 2
Total number of connections:     8

The following is sample output from the show dlsw peers command with a TCP connection:

Router# show dlsw peers
Peers:                state     pkts_rx   pkts_tx  type  drops ckts TCP   uptime
 TCP 1.1.91.1 
     High priority   CONNECT         43        40  conf      0    1   0 00:01:02
   Medium priority   CONNECT          0         0  conf      0    -   0 00:01:02
   Normal priority   CONNECT          4        41  conf      0    -   5 00:01:02
      Low priority   CONNECT          1         0  conf      0    -   0 00:01:02
 TCP 1.1.93.1       
     High priority   CONNECT          3         3  conf      0    0   0 00:00:58
   Medium priority   CONNECT          0         0  conf      0    -   0 00:00:58
   Normal priority   CONNECT          0         0  conf      0    -   0 00:00:58
      Low priority   CONNECT          0        39  conf      0    -   0 00:00:58
Total number of connected peers: 2
Total number of connections:     8

The following is sample output from the show dlsw peers command with a Direct Frame Relay connection:

Router # show dlsw peers 
Peers:                state 	 	 	 	pkts_rx pkts_tx  type  drops ckts TCP 	 	 	 uptime
IF SE1	16connect	652	597	conf	0	-	-	00:04:09
Total number of connected peers: 2
Total number of connections:     8

The following is sample output from the show dlsw peers command with a Direct Frame Relay with local acknowledgment (LLC2) connection:

Router # show dlsw peers
Peers:                state pkts_rx pkts_tx  type  drops ckts TCP uptime
LLC2 SE1	16connect	1179	108	conf	0	1	-	00:04:09
Total number of connected peers: 2
Total number of connections:     8

Table 34 describes the significant fields shown in the show dlsw peers command display.


Table 34: Show DLSw Peers Field Descriptions
Field Description

Peers

Information related to the remote peer, including encapsulation type, IP address (if using FST or TCP), and interface number (if using direct encapsulation).

tot-Q'd

Number of UDP packets that have been queued because of TCP congestion.

total-rx

Number UDP packets received from the peer.

total-tx

Number of UDP packets transmitted to the peer.

tot-retx

Number of reachability retransmits (for example, DLSw+ retries NQ_ex and CUR_ex) when originally sent via UDP.

tot-drop

Number of queued UDP packets that were dropped because of persistent TCP congestion.

curr-Q'd

Number of current UDP packets queued because of TCP congestion.

TCP

Number of packets currently on TCP output queue.

state

State of the peer:
CONNECT: normal working peer
DISCONN: peer is not connected
CAP_EXG: capabilities exchange mode. Waiting for capabilities response.
WAIT_RD: TCP write pipe (local port 2065) is open and peer is waiting for remote peer to open the read port (local port 2067). This field applies only to TCP peers.
WAN_BUSY: TCP outbound queue is full. This field applies only to TCP peers.

pkts_rx

Number of received packets.

pkts_tx

Number of transmitted packets.

type

Type of remote peer:

conf : configured
prom : promiscuous
pod : peer on demand

drops

The number of drops done by this peer. Reasons for the counter to increment:

  • WAN interface not up for a direct peer.

  • DLSW tries to send a packet before the peer is fully connected (waiting for TCP event or capabilities event).

  • Outbound TCP queue full.

  • FST sequence number count mismatch.

  • Cannot get buffer to "slow switch" FST packet.

  • CiscoBus controller failure on high end (cannot move packet from receive buffer to transmit buffer, or vice versa).

  • Destination IP address of FST packet does not match local peer-ID.

  • WAN interface not up for an FST peer.

  • No SRB route cache command configured.

  • Madge ring buffer is full on low end systems (WAN feeding LAN too fast).

uptime

How long the connection has been established to this peer.

ckts

Number of active circuits through this peer. This field applies only to TCP and LLC2 transport peer types.

total number of connected peers

ltotal number of currently connected peers

total number of connections

ltotal number of active cicuit connections

show dlsw reachability

Use the show dlsw reachability privileged EXEC command to display DLSw+ reachability information.

show dlsw reachability [[group [value] | local | remote] | [mac-address [address]
[netbios-names [name]]

Syntax Description

group

(Optional) Displays contents of group reachability cache only.

value

(Optional) Specifies the group number for the reachability check. Only displays group cache entries for the specified group. The valid range is 1 to 255.

local

(Optional) Displays contents of local reachabilty cache only.

remote

(Optional) Displays contents of remote reachabilty cache only.

mac-address

(Optional) Displays DLSw reachability for MAC addresses only.

address

(Optional) Specifies the MAC address for which to search in the reachability cache.

netbios-names

(Optional) Displays DLSw reachability for NetBIOS names only.

name

(Optional) Specifies the NetBIOS name for which to search in the reachability cache.

Command Mode

Privileged EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

If none of the group, local, or remote options are specified, then the caches will be displayed in the following order: local, remote, and group.

Sample Displays

The following is sample output from the show dlsw reachability group command:

Router# show dlsw reachability group
DLSw Group MAC address reachability cache list
Mac Addr Group
0000.3072.1070     10
DLSW Group NetBIOS Name reachability cache list
NetBIOS Name    Group

The following is sample output from the show dlsw reachability command:

Router# show dlsw reachability
DLSw MAC address reachability cache list
Mac Addr                status          Loc.        peer/port                    rif
0000.f641.91e8    SEARCHING    LOCAL      
0006.7c9a.7a48    FOUND            LOCAL      TokenRing0/0      0CB0.0011.3E71.A041.0DE5.0640
0800.5a4b.1cbc    SEARCHING    LOCAL      
0800.5a54.ee59    SEARCHING    LOCAL      
0800.5a8f.9c3f    FOUND            LOCAL      TokenRing0/0      08B0.A041.0DE5.0640
4000.0000.0050    FOUND            LOCAL      TokenRing0/0      0CB0.0011.3E71.A041.0DE5.0640
4000.0000.0306    FOUND            LOCAL      TokenRing0/0      0CB0.0011.3E71.A041.0DE5.0640
4000.0000.0307    SEARCHING    LOCAL      
4000.0000.0308    SEARCHING    LOCAL      
4000.1234.56c1    FOUND            LOCAL      Serial3/7            --no rif--
4000.1234.56c2    FOUND            LOCAL      Serial3/7            --no rif--
4000.3000.0100    FOUND            LOCAL      TokenRing0/0      08B0.A041.0DE5.0640
4000.4000.ff40    SEARCHING    LOCAL      
4000.7470.00e7    SEARCHING    LOCAL      
4000.ac0b.0001    FOUND            LOCAL      TokenRing0/0      08B0.A041.0DE5.0640
4001.0000.0064    FOUND            LOCAL      TokenRing0/0      0CB0.0011.3E71.A041.0DE5.0640
4001.3745.1088    FOUND            LOCAL      TokenRing0/0      08B0.A041.0DE5.0640
4100.0131.1030    FOUND            LOCAL      TokenRing0/0      
10B0.FFF1.4041.0041.3E71.A041.0DE5.0640
DLSw NetBIOS Name reachability cache list
NetBIOS Name        status          Loc.        peer/port                    rif
APPNCLT2                FOUND            LOCAL      TokenRing0/0      08B0.A041.0DE5.0640

The following is sample output from the show dlsw reachability command with the mac-address argument:

Router# show dlsw reachability mac-address 4000.00000306
DLSw MAC address reachability cache list
Mac Addr                status          Loc.        peer/port                    rif
4000.0000.0306    FOUND            LOCAL      TokenRing0/0      0CB0.0011.3E71.A041.0DE5.0640

The following is sample output from the show dlsw reachability command with the netbios-names argument:

Router# show dlsw reachability netbios-names
DLSw NetBIOS Name reachability cache list
NetBIOS Name        status          Loc.        peer/port                    rif
APPNCLT2                FOUND            LOCAL      TokenRing0/0      08B0.A041.0DE5.0640

Table 35 describes the significant fields shown in the show dlsw reachability command.


Table 35: Show DLSw Reachability Field Descriptions
Field Description

Mac Addr

MAC address of station being sought (destination MAC address of canureach_ex packet).

NetBIOS Name

NetBIOS name of station being sought (destination MAC address of NQ_ex packet).

status

Result of station search. The status can be one of the following:

  • FOUND: Station has recently sent a broadcast or responded to a broadcast.

  • SEARCHING: Router has sent broadcast to this station and is waiting for a response.

  • NOT_FOUND: Negative caching is on, and the station has not responded to queries.

  • UNCONFIRMED: Station is configured, but DLSw has not verified it.

  • VERIFY: Cache information is being verified because cache is going stale, or the user configuration is being verified.

Loc.

Location of station. LOCAL indicates that the station is on the local network. REMOTE indicates that the station is on the remote network.

peer/port

Peer/port number. If the Loc. field lists a REMOTE station, the peer/port field indicates the peer through which the remote station is reachable. If the Loc. field lists a LOCAL station, the peer/port field indicates the port through which the local station is reachable. For ports, the port number and slot number are given. Pxxx-Syyy denotes port xxx slot yyy. If the station is reachable through a bridge group, that is shown by TBridge-xxx.

rif

Shows the RIF in the cache. This column applies only to LOCAL stations. If the station was reached through a medium that does not support RIFs (such as SDLC or Ethernet) then "--no rif--" is shown.

show dlsw statistics

Use the show dlsw statistics privileged EXEC command to display the number of frames that have been processed in the local, remote, and group cache.

show dlsw statistics [border-peers]

Syntax Description

border-peers

(Optional) Displays the number of frames processed in the local, remote, and group caches.

Command Mode

Privileged EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.2 F.

Sample Display

The following sample is a sample output from the show dlsw statistics command. The output displays the number of frames processed in the local, remote, and group cache:

router# show dlsw statistics border-peers
100 Border Peer Frames processed
10 Border frames found Local
20 Border frames found Remote
17 Border frames found Group Cache


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