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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.

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:

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:

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 belongs.
bgroups The transparent bridge group to which DLSw+ will be attached. The valid range is 1 to 63.
number The transparent bridge group list number. The valid range is 1 to 255.
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 bgroup list 1:

dlsw bgroup-list 1 bgroups 33
Related Commands

dlsw bridge-group
dlsw port-list
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
no dlsw bridge-group group-number

Syntax Description
group-number The transparent bridge group to which DLSw+ will be attached. 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.

Example

The following example links DLSw+ to bridge group 1:

dlsw bridge-group 1
Related Command

dlsw bgroup-list

dlsw disable

Use the dlsw disable global configuration command to disable and reenable DLSw+ without altering the configuration.

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 disables and reenables DLSw+:

dlsw disable
Related Command

show dlsw capabilities

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 the 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
Related Command

show dlsw capabilities

dlsw explorerq-depth

Use the dlsw explorerq-depth global configuration command to configure the depth of the DLSw explorer packet processing queue. Use the no form of this command to disable the explorer packet processing queue.

dlsw explorerq-depth queue-max
no dlsw explorerq-depth queue-max

Syntax Description
queue-max Maximum queue size in packets. The valid range is 25 to 500 packets.
Default

No default queue-max is configured.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

Example

The following example sets the explorer packet processing queue to 256:

dlsw explorerq-depth 256
Related Command

show dlsw capabilities

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... Array of SAPs.
Default

No lists are configured.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3

The dlsw icannot reach 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 a list of SAPs that are not reachable:

dlsw icannotreach saps F0
Related Command

show dlsw capabilities

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

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.
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 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. The wildcard is either an asterisk (*) at the end or a question mark (?) in the middle of the name.
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.

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:

dlsw icanreach netbios-exclusive
dlsw icanreach netbios-name lanserv
Related Commands

show dlsw capabilities
show dlsw peers

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

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.
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.
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.
Default

No parameters are defined.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

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

dlsw duplicate-path-bias
show dlsw capabilities
show dlsw peers

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

Syntax Description
mac-addr Specifies the MAC address.
ring-group ring 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.
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.

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

show dlsw capabilities
show dlsw peers

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

Syntax Description
netbios-name Specifies the NetBIOS name. Wildcards are allowed.
ring-group ring 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.
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.

Example

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

dlsw netbios-name netname ring-group 3
Related Commands

show dlsw capabilities
show dlsw peers

dlsw peer-on-demand-defaults fst

Use the dlsw peer-on-demand-defaults fst global configuration command to configure FST 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]
host-netbios-out host-list-name] [keepalive seconds] [lsap-output-list list] [port-list
port-list-number].
no dlsw peer-on-demand-defaults fst [bytes-netbios-out bytes-list-name [cost cost]
host-netbios-out host-list-name] [keepalive seconds] [lsap-output-list list] [port-list
port-list-number]

Syntax Description
bytes-netbios-out bytes-list-name 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 Specifies the cost to reach peer-on-demand peers. The valid range is 1 to 5. The default cost is 3.
host-netbios-out host-list-name 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 default is 10 minutes.
keepalive seconds 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 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
lsap-output-list list 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 Configures a port list for peer-on-demand peers. Valid numbers are in the range 0 to 4095.
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.

Example

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

dlsw peer-on-demand-defaults fst
Related Commands

show dlsw capabilities
show dlsw peers

dlsw peer-on-demand-defaults tcp

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

dlsw peer-on-demand-defaults tcp [bytes-netbios-out bytes-list-name] [cost cost]
[
host-netbios-out host-list-name] [keepalive seconds] [local-ack] [lsap-output-list
list] [port-list port-list-number] [priority]
no dlsw peer-on-demand-defaults tcp [bytes-netbios-out bytes-list-name] [cost cost]
[
host-netbios-out host-list-name] [keepalive seconds] [local-ack] [lsap-output-list
list] [port-list port-list-number] [priority]

Syntax Description
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.
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 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 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
local-ack (Optional) Configures local acknowledgment for peer-on-demand sessions.
lsap-output-list list (Optional) Configures 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.
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.

Example

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

dlsw peer-on-demand-defaults tcp
Related Commands

show dlsw capabilities
show dlsw peers

dlsw port-list

Use the dlsw port-list global configuration command to map traffic on a local interface (Ethernet, 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 Ethernet interface 1:

dlsw port-list 3 ethernet 1
Related Commands

dlsw bgroup-list
dlsw ring-list

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] [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] [pass-thru]
no dlsw remote-peer list-number frame-relay interface serial number dlci-number
[backup-peer ip-address] [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] [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) Configures a backup to an existing peer.
bytes-netbios-out bytes-list-name (Optional) Configures NetBIOS bytes output filtering for this peer. The bytes-list-name 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, where access-list-number is the list number specified in an 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 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
linger minutes (Optional) Configures length of time the backup peer remains connected after the primary peer connection has been re-established. 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.
pass-thru (Optional) Selects passthrough mode. (The default, if nothing is specified, is local acknowledgment mode.)
Default

No defaults are specified.

Command Mode

Global configuration

Usage Guidelines

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

Example

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

dlsw remote-peer 0 frame-relay interface 0 30
Related Commands

dlsw local-peer
show dlsw capabilities
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 assignments.

dlsw remote-peer list-number fst ip-address [backup-peer ip-address]
[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] [pass-thru]
no dlsw remote-peer list-number fst ip-address [backup-peer ip-address]
[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] [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.
ip-address IP address of the remote peer with which the router is to communicate.
backup-peer ip-address (Optional) Configures a backup to an existing TCP/FST peer.
bytes-netbios-out bytes-list-name (Optional) Configures NetBIOS bytes output filtering for this peer. The bytes-list-name 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, where access-list-number is the list number specified in an 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 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
linger minutes (Optional) Configures length of time the backup peer remains connected after the primary peer connection has been re-established. 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.
pass-thru (Optional) Selects passthrough mode. (The default, if nothing is specified, is local acknowledgment mode.)
Default

No FST encapsulation connection is specified.

Command Mode

Global configuration

Usage Guidelines

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

Example

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

dlsw remote-peer 1 fst 10.2.17.8
Related Commands

dlsw local-peer
show dlsw capabilities
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]
[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] [pass-thru]
no dlsw remote-peer list-number interface serial number [backup-peer ip-address]
[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] [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 ipaddress (Optional) Configures a backup to an existing peer.
bytes-netbios-out bytes-list-name (Optional) Configures NetBIOS bytes output filtering for this peer. The bytes-list-name 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, where access-list-number is the list number specified in an 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 for this remote 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
linger minutes (Optional) Configures length of time the backup peer remains connected after the primary peer connection has been re-established. 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.
pass-thru (Optional) Selects passthrough mode. (The default, if nothing is specified, 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 11.0. The folloiwng keywords and arguments first appeared in Cisco IOS Release 11.2: dest-mac mac-address, dmac-output-list access-list-number , 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.

Example

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

dlsw remote-peer 1 interface serial 2
Related Commands

A dagger (+) indicates that the command is documented outside this chapter.

show dlsw peers
show interfaces 
+

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]
[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] [keepalive seconds] [lf size] [linger minutes] [lsap-output-list list]
[
no-llc minutes] [priority] [tcp-queue-max size] [timeout seconds]
no dlsw remote-peer list-number tcp ip-address [backup-peer ip-address]
[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] [keepalive seconds] [lf size] [linger minutes] [lsap-output-list list]
[
no-llc minutes] [priority] [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) Configures a backup to an existing peer.
bytes-netbios-out bytes-list-name (Optional) Configures NetBIOS bytes output filtering for this peer. The bytes-list-name 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, where 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 (Optional) Sets the keepalive interval for this remote peer. The range is 0 to 1200 seconds.
lf size (Optional) Largest frame size for this remote 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
linger minutes (Optional) Configures length of time the backup peer remains connected after the primary peer connection has been re-established. 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.
priority (Optional) Enables prioritization features for this remote peer. Valid TCP port numbers are the following:
high: 2065
medium: 1981
normal: 1982
low: 1983
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 linger 5 minutes.

The dynamic option is inactive. If the dynamic option is added with neither suboption (inactivity, no-llc) 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 11.0. The folloiwng keywords and arguments first appeared in Cisco IOS Release 11.1: dynamic, inactivity minutes, linger minutes, no-llc minutes, timeout seconds. The folloiwng keywords and arguments first appeared in Cisco IOS Release 11.2: dest-mac mac-address, dmac-output-list access-list-number , linger minutes .

SNA dial-on-demand routing (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.

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 either 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 only 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.

Example

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

dlsw remote-peer 1 tcp 10.2.17.8
Related Commands

dlsw ring-list
show dlsw capabilities
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

dlsw bgroup-list
dlsw port-listt
show dlsw capabilities
show dlsw peers

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

Syntax Description
icannotreach-block-time time Cache life of unreachable resource, during which searches for that resource are blocked. The valid range is 1 to 86400 seconds. The default is 0 (disabled).
netbios-cache-timeout time Cache life of NetBIOS name location for both local and remote reachability cache. The valid range is 1 to 86400 seconds. The default is 16 minutes.
netbios-explorer-timeout time Length of time that the Cisco IOS software waits for an explorer response before marking a resource unreachable (LAN and WAN). The valid range is 1 to 86400 seconds. The default is 6 seconds.
netbios-retry-interval time NetBIOS explorer retry interval (LAN only). The valid range is 1 to 86400 seconds. The default is 1 second.
netbios-verify-interval time Interval between the creation of a cache entry and when the entry is marked as stale. If a search request comes in for a stale cache entry, a directed verify query is sent to assure that it still exists. The valid range is 1 to 86400 seconds. The default is 4 minutes.
sna-cache-timeout time Length of time that a System Network Architecture (SNA) MAC/SAP location cache entry exists before it is discarded (local and remote). The valid range is 1 to 86400 seconds. The default is 16 minutes.
sna-explorer-timeout time Length of time that the Cisco IOS software waits for an explorer response before marking a resource unreachable (LAN and WAN). The valid range is 1 to 86400 seconds. The default is 3 minutes.
sna-retry-interval time Interval between SNA explorer retries (LAN). The valid range is 1 to 86400 seconds. The default is 30 seconds.
sna-verify-interval time Interval between the creation of a cache entry and when the entry is marked as stale. If a search request comes in for a stale cache entry, a directed verify query is sent to assure that it still exists. The valid range is 1 to 86400 seconds. The default is 4 minutes.
Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

Example

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

dlsw timer sna-cache-timeout 3

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:

x25 address 3110212011
x25 map qllc 1000.000.0001 31104150101
qllc dlsw partner 4000.1161.1234
Related Command

A dagger (+) indicates that the command is documented outside this chapter.

show qllc +

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
no sdlc dlsw sdlc-address

Syntax Description
sdlc-address SDLC address in hexadecimal. The valid range is 1 to FE.
Default

No correspondence is defined.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

Example

The following command attaches SDLC address d2 to DLSw+:

sdlc dlsw d2
Related Commands

A dagger (+) indicates that the command is documented outside this chapter.

encapsulation sdlc +
sdlc address +
sdlc role 
+

show dlsw capabilities

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

show dlsw capabilities [interface type number | ip-address ip-address | local]
Syntax Description
interface (Optional) Specifies the interface for which the DLSw+ capabilities are to be displayed.
type Interface type is indicated by the keyword ethernet, null, serial, or tokenring.
number Interface number.
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 11.0.

Sample Display

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

Router# show dlsw capabilities
DLSw: Capabilities for peer 10.2.17.7(2065)
  vendor id (OUI)         : '00C' (cisco)
  version number          : 1
  release number          : 0
  init pacing window      : 10
  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
  local-ack capable       : yes
  priority capable        : no
  peer group number       : 10
  border peer capable     : yes
  peer cost               : 3
  border peer for group 10 : peer 10.2.17.7(2065) cost 3
  version string          :

Table 28 describes significant fields shown in the display.


Table 28: Show DLSw Capabilities Field Descriptions
Field Description
vendor id (OUI) Vendor ID is cisco
version number DLSw Version Number = 1
release number Release = 0
init pacing window Initial Pacing Window = 10
unsupported saps Unsupported SAPs = none
num of tcp sessions Number of TCP sessions = 1
loop prevent support No Loop Prevent Support = no
icanreach mac-exclusive icanreach mac-exclusive = no
icanreach netbios-excl. icanreach netbios-exclusive = no
reachable mac address Reachable MAC addresses = none
reachable netbios name Reachable NetBIOS names = none
cisco version number Cisco version number = 1
local-ack capable Local acknowledgment capable = yes
priority capable Priority capability = no
peer group number Peer group member number = 10
border peer capable Border peer capability = yes
peer cost Peer cost = 3
border peer for group 10 Peer 10.2.17.7 (2065) cost = 3
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 | major-key {minor-key}]
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.
major-key (Optional) Specifies the major key portion of the circuit index. If a major key is given, it must be followed by a minor key.
minor-key Specifies the minor key portion of the circuit index.
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 circuits command:

Router# show dlsw circuits 
Index   local addr(lsap)    remote addr(dsap)   state
75-00   1000.5acc.5acc(F0)  1000.5acc.800d(F0)  CONNECTED
119-00  1000.5acc.88ea(04)  1000.5acc.800d(08)  CONNECTED
121-00  4006.315b.568e(F0)  0006.311d.eea1(F0)  CONNECTED

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
194-00  0800.5a9b.b3b2(F0)  0800.5ac1.302d(F0)  CONNECTED
        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

Table 29 describes significant fields shown in the display.


Table 29: Show DLSw Circuits Field Descriptions
Field Description
Index Index = 4D00
local addr (lsap) Local Address (LSAP) = 4006.313c.a07f (F0)
remote addr (dsap) Remote Address (DSAP) = 0800.5a8f.8822
state Connected

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:

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

Table 30 describes significant fields shown in the display.


Table 30: Show DLSw Fastcache Field Descriptions
Field Description
peer Peer = FST 10.2.32.1
local-mac Local MAC = 0800.5a8f.881c
remote-mac Remote MAC = 0800.5a8f.8822
l/r sap Local/Remote SAP 4/4
rif RIF 0680.02D5.1360

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]
Syntax Description
interface (Optional) Specifies the interface for which the DLSw+ peer information is to be displayed.
type Interface type, indicated by the keyword ethernet, null, serial, or tokenring.
number Interface number.
ip-address ip-address (Optional) Specifies a remote peer by its IP address.
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 peers command:

Router# show dlsw peers ip-address 10.2.32.1
Peers:                state  rg_lst  pkts_rx  pkts_tx  type  drops group border
 TCP 10.2.32.1       CONNECT     0     79170    50816  conf      0    0     no

Table 31 describes significant fields shown in the display.


Table 31: Show DLSw Peers Field Descriptions
Field Description
Peers Information related to the remote peer, including encapsulation type, IP address (if using FST, TCP), and interface number (if using direct encapsulation.)
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.
rg lst Port, ring, or bridge group list number. The default is 0. The possible range is 1 to 255. The rg lst number can be used on port, ring, and bgroup lists. The number is the means by which all 3 lists are associated
pkts_rx Number of received packets.
pkts_tx Number of transmitted packets.
type conf : configuration
prom : promiscuous
pod : peer on demand
drops 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).
group Peer group number. Valid range is 1 to 255.
border YES = border peer capable
NO = not a border peer

show dlsw reachability

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

show dlsw reachability [mac-address [address]] [netbios-names [name]]
Syntax Description
mac-address (Optional) Display DLSw reachability by MAC address.
address (Optional) Specifies the MAC address for the reachability check.
netbios-names (Optional) Display DLSw reachability by NetBIOS name.
name (Optional) Specifies the NetBIOS name for the reachability check.
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 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 32 describes significant fields shown in the display.


Table 32: Show DLSw Reachability Field Descriptions
Field Description
Mac Addr MAC address of station being sought (destination MAC address of canureach_ex packet).
status Result of search:
FOUND
SEARCHING:
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: Verifying cache information because cache is going stale, or the user configuration is being verified.
Loc Location of station:
LOCAL: On the local network
REMOTE: 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 Currently this column applies only to LOCAL stations. If the station was reached through some media that does not support RIFs (such as SDLC or Ethernet) then DLSW shows "--no rif--." Otherwise, the actual RIF in the cache is shown.

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