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Table of Contents

ATM Commands

ATM Commands

This chapter describes the commands available to configure Asynchronous Transfer Mode (ATM) interfaces on the following:

This chapter also describes the commands available to configure a serial interface for ATM access in other routers.


Note Beginning in Cisco  IOS Release  11.3, all commands supported on the Cisco 7500 series routers are also supported on the Cisco 7000 series routers equipped with RSP7000.

For ATM configuration information and examples, refer to the ATM chapters in the Wide-Area Networking Configuration Guide.

abr

To select Available Bit Rate (ABR) QOS and configure the output peak cell rate and output minimum guaranteed cell rate for an ATM PVC or VC class, use the abr command in the appropriate command mode. Use the no form of this command to remove the ABR parameters.

abr output-pcr output-mcr
no abr output-pcr output-mcr

Syntax Description

output-pcr

The output peak cell rate in kilobits per second.

output-mcr

The output minimum guaranteed cell rate in kilobits per second.

Default

ABR QOS at the maximum line rate of the physical interface.

Command Mode

Interface-ATM-VC configuration (for an ATM PVC)

VC-class configuration (for a VC class)

Usage Guidelines

This command first appeared in Cisco IOS Release 11.1CA.

If the abr command is not explicitly configured on an ATM PVC, the VC inherits the following default configuration (listed in order of next highest precedence):

Available bit rate (ABR) is a quality of service class defined by the ATM Forum for ATM networks. ABR is used for connections that do not require timing relationships between source and destination. ABR provides no guarantees in terms of cell loss or delay, providing only best-effort service. Traffic sources adjust their transmission rate in response to information they receive describing the status of the network and its capability to successfully deliver data.

In ABR transmission, the peak cell rate (PCR) specifies the maximum value of the allowed cell rate (ACR), and minimum cell rate (MCR) specifies the minimum value for the ACR. ACR varies between the MCR and the PCR and is dynamically controlled using congestion control mechanisms.

Example

The following example specifies the output-pcr to be 100,000 kbps and the output-mcr to be 3000  Kbps for an ATM PVC:

pvc 1/32
  abr 100000 3000

Related Commands

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

ubr
ubr+
vbr-nrt

atm aal aal3/4

To enable support for ATM adaptation layer 3/4 (AAL3/4) on an ATM interface, use the atm  aal  aal3/4 interface configuration command. To disable support for ATM adaptation layer 3/4 (AAL3/4) on an ATM interface, use the no form of this command.

atm aal aal3/4
no atm aal aal3/4

Syntax Description

This command has no arguments or keywords.

Default

Support for AAL3/4 is disabled.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

This command is supported on Cisco  7500 series routers with AIP. This command is not supported on the ATM port adapter. Because Cisco  4500 and Cisco  4700 routers always support both AAL3/4 and AAL5, this command is not required on Cisco  4500 and Cisco  4700 routers.

Only one virtual circuit can exist on a subinterface that is being used for AAL3/4 processing, and that virtual circuit must be an AAL3/4 virtual circuit.

The AAL3/4 support feature requires static mapping of all protocols except IP.

Example

The following example enables AAL3/4 on ATM interface 2/0:

interface atm2/0
  ip address 172.21.177.178 255.255.255.0
  atm aal aal3/4

Related Commands

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

atm mid-per-vc
atm multicast
atm smds-address
pvc

atm abr rate-factor

To configure the amount that the cell transmission rate increases or decreases in response to flow control information from the network or destination for available bit rate (ABR) virtual circuits (VCs), use the atm abr rate-factor interface configuration command. To return to the default, use the no form of this command.

atm abr rate-factor [rate-increase-factor] [rate-decrease-factor]
no atm abr rate-factor [rate-increase-factor] [rate-decrease-factor]

Syntax Description

rate-increase-factor

(Optional) Factor by which to increase the data rate. The rate increase factor  is specified in powers of 2 from 1 to 32768. The default is  16.

rate-decrease-factor

(Optional) Factor by which to decrease the data rate. The rate decrease factor is specified in powers of 2 from 1 to 32768. The default is  16.

Default

ABR rate increase and decrease factor is 16.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.1 CA.

To configure an ABR VC, use the pvc command with the abr keyword.

To verify the ABR rate factor, use the show atm interface atm EXEC command.

Example

The following example sets the ABR rate factor to 32 for the next cell that is transferred on ATM interface 4/0:

interface atm 4/0
  atm abr rate-factor 32 32

Related Commands

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

pvc
show atm interface atm

atm address-registration

To enable the router to engage in address registration and callback functions with the Interim Local Management Interface (ILMI), use the atm address-registration interface configuration command. To disable ILMI address registration functions, use the no form of this command.

atm address-registration
no atm address-registration

Syntax Description

This command has no arguments or keywords.

Default

Enabled

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

This command enables a router to register its address with the ILMI for callback when specific events occur, such as incoming Simple Network Management Protocol (SNMP) traps or incoming new network prefixes.

Example

The following example enables ATM interface I/O to register its address:

interface atm 1/0
  atm address-registration

Related Commands

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

atm ilmi-keepalive

atm arp-server

To identify an ATM Address Resolution Protocol (ARP) server for the IP network or set time-to-live (TTL) values for entries in the ATM ARP table, use the atm arp-server interface configuration command. To remove the definition of an ATM ARP server, use the no form of this command.

atm arp-server [self [time-out minutes] | nsap nsap-address]]
no atm arp-server [self [time-out minutes] | nsap nsap-address]]

Syntax Description

self

(Optional) Specifies the current router as the ATM ARP server.

time-out minutes

(Optional) Number of minutes a destination entry listed in the ATM ARP server's ARP table will be kept before the server takes any action to verify or time out the entry. The default is 20 minutes.

nsap nsap-address

(Optional) Network service access point (NSAP) address of an ATM ARP server.

Defaults

The ARP server process is disabled. The default timeout value is 20 minutes.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.1.

If an NSAP address is specified, the ARP client on this interface uses the specified host as an ARP server. You can specify multiple ATM ARP servers by repeating the command. If self is specified, this interface acts as the ARP server for the logical IP network.

The ATM ARP server takes one of the following actions if a destination listed in the server's ARP table expires:

This implementation follows RFC 1577, Classical IP over ATM.

Example

The following example configures ATM on an interface and configures the interface to function as the ATM ARP server for the IP subnetwork:

interface atm 0/0
  ip address 10.0.0.1.255.0.0.0
atm nsap-address ac.1533.66.020000.0000.0000.0000.0000.0000.0000.00
atm rate-queue 1 100
atm maxvc 1024
atm pvc 1 0 5 qsaal
atm arp-server self

atm clock internal

To cause the ATM interface to generate the transmit clock internally, use the atm clock internal interface configuration command. The no form of this command restores the default value.

atm clock internal
no atm
clock internal

Syntax Description

This command has no arguments or keywords.

Default

The ATM interface uses the transmit clock signal from the remote connection (the line). The switch provides the clocking.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

This command is meaningless on a 4B/5B physical layer interface module (PLIM).

For SONET interfaces, use the atm clock internal command to configure an ATM port adapter to supply its internal clock to the line.

Example

The following example causes the ATM interface to generate the transmit clock internally:

atm clock internal

atm ds3-scramble

To enable scrambling of the ATM cell payload for the DS-3 PLIM on an ATM interface, use the atm ds3-scramble interface configuration command. To disable scrambling of the ATM cell payload for the DS-3 PLIM, use the no form of this command.

atm ds3-scramble
no atm ds3-scramble

Syntax Description

This command has no arguments or keywords.

Default

DS3 scrambling is disabled.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

This command was modified in Cisco IOS Release 11.1 CA to change the command syntax from ds3 scramble to atm ds3-scramble.

D3 scrambling is used to assist clock recovery on the receiving end.

Example

The following example disables DS3 scrambling on the interface:

interface atm 4/0
  no atm ds3-scramble

atm e164 auto-conversion

To enable ATM E164 auto conversion, use the atm e164 auto-conversion interface configuration command. To disable auto conversion, use the no form of this command.

atm e164 auto-conversion
no atm e164 auto-conversion

Syntax Description

This command has no arguments or keywords.

Default

Disabled

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3 NA.

When an interface is configured for E.164 auto conversion, ATM E.164 format addresses are converted to the corresponding native E.164 address for outgoing calls. For incoming calls, native E.164 addresses are converted to the corresponding ATM E.164 format.

Enable the ATM interface before using the atm e164 auto-conversion command.

Example

The following example enables E.164 auto conversion on ATM interface 0/0/1:

interface atm 0/0/1
  atm e164 auto-conversion

atm e3-scramble

To enable scrambling of the ATM cell payload for the E3 PLIM on an ATM interface, use the atm  e3-scramble interface configuration command. To disable scrambling of the ATM cell payload for the E3 PLIM, use the no form of this command.

atm e3-scramble
no atm e3-scramble

Syntax Description

This command has no arguments or keywords.

Default

E3 scrambling is enabled.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.1 CA.

E3 scrambling is used to assist clock recovery on the receiving end.

Example

The following example disables E3 scrambling on the interface:

interface atm 2/0
  no atm e3-scramble

atm esi-address

To enter the end station ID (ESI) and selector byte fields of the ATM NSAP address, use the atm esi-address interface configuration command. The NSAP address prefix is filled in via ILMI from the ATM switch. The no form deletes the end station address.

atm esi-address esi.selector
no atm esi-address esi.selector

Syntax Description

esi

End station ID field value in hexadecimal; 6 bytes long.

selector

Selector field value in hexadecimal; 1 byte long.

Default

No end station is defined.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.1.

Before Cisco  IOS Release 11.1, ATM addresses were configured on the router only by use of the atm nsap-address interface configuration command. The complete 20-byte NSAP (40 hexadecimal characters) had to be configured.

The atm esi-address command allows you to configure the ATM address by entering the ESI (12  hexadecimal characters) and the selector byte (2 hexadecimal characters). The ATM prefix (26  hexadecimal characters) will be provided by the ATM switch. To get the prefix from the ATM switch, the ILMI permanent virtual circuit (PVC) must be configured on the router and the ATM switch must be able to supply a prefix via ILMI.


Note When ILMI is configured, use the atm  esi-address command instead of the atm  nsap-address command. The atm esi-address and atm nsap-address commands are mutually exclusive. Configuring the router with the atm esi-address command negates the atm nsap-address setting, and vice versa.

The ILMI PVC must be configured in order to get an NSAP address prefix from the switch.

Example

The following example sets up the ILMI PVC and assigns the ESI and selector field values on the ATM interface 4/0:

interface atm 4/0
  atm pvc 2 0 16 ilmi
  atm esi-address 345678901234.12

Related Commands

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

atm nsap-address
ilmi
pvc

atm exception-queue

To set the exception queue length, use the atm exception-queue interface configuration command. The no form of this command restores the default value.

atm exception-queue number
no atm exception-queue

Syntax Description

number

Number of entries in the range of 8 to 256. Default is 32 entries.

Default

32 entries

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

This command is supported on AIP for Cisco  7500 series routers. This command is not supported on the ATM port adapter for Cisco 7200 and 7500 series routers, nor is it supported on Cisco  4500 and Cisco  4700 routers.

The exception queue is used for reporting ATM events, such as cycle redundancy check (CRC) errors.

Example

The following example sets the exception queue to 50 entries:

atm exception-queue 50

atm framing (DS3)

To specify DS3 line framing on an ATM interface, use the atm framing interface configuration command. To return to the default C-bit with Physical Layer Convergence Protocol (PLCP) framing, use the no form of this command.

atm framing [cbitadm | cbitplcp | m23adm | m23plcp]
no atm framing [cbitadm | cbitplcp | m23adm | m23plcp]

Syntax Description

cbitadm

(Optional) Specifies C-bit with ATM direct mapping.

cbitplcp

(Optional) Specifies C-bit with PLCP framing. This is the default.

m23adm

(Optional) Specifies M23 ATM direct mapping.

m23plcp

(Optional) Specifies M23 with PLCP framing.

Default

cbitplcp

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.2.

This command was modified in Cisco IOS Release 11.1 CA to include Cisco  7200 series routers with the ATM-CES port adapter.

This command is available on Cisco  4500 and 4700 routers with DS3 access speeds, Cisco  7200 series routers, and Cisco  7500 series routers.

Framing on the interface must match that on the switch for this ATM link.

Example

The following example specifies M23 ADM framing on a router that has been set up with DS3 access to an ATM network:

interface atm 4/0
 atm framing m32adm

atm framing (E3)

To specify E3 line framing, use the atm framing interface configuration command. To return to the default G.751 Physical Layer Convergence Protocol (PLCP) framing, use the no form of this command.

atm framing [g751adm | g832adm | g751plcp]
no atm framing [g751adm | g832adm | g751plcp]

Syntax Description

g832adm

(Optional) Specifies G.832 ATM Direct Mapping.

g751adm

(Optional) Specifies G.751 ATM Direct Mapping.

g751plcp

(Optional) Specifies G.751 PLCP encapsulation. This is the default.

Default

The default framing is g751plcp.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

This command was modified in Cisco IOS Release 11.1 CA to include the g751plcp keyword and to include information on the Cisco  7200 series router with the ATM-CES port adapter.

The default framing is described in the ITU-T Recommendation G.751.


Note The ITU-T carries out the functions of the former Consultative Committee for International Telegraph and Telephone (CCITT).

Framing on the interface must match that on the switch for this ATM link.

Example

The following example specifies G.832 ADM framing on a router that has been set up with E3 access to an ATM network:

interface atm 4/0
  atm framing g832adm

atm ilmi-keepalive

To enable Interim Local Management Interface (ILMI) keepalives, use the atm ilmi-keepalive interface configuration command. To disable ILMI keepalives, use the no form of this command.

atm ilmi-keepalive [seconds]
no atm ilmi-keepalive [seconds]

Syntax Description

seconds

(Optional) Number of seconds between keepalives. The default is 3  seconds. Values less than 3 seconds are rounded to 3  seconds, and there is no upper bound to the range of values.

Default

Disabled

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

Example

The following example enables ILMI keepalives for the ATM interface 1/0:

interface atm 1/0
  atm address-registration
  atm ilmi-keepalive 

Related Commands

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

atm address-registration

atm ilmi-pvc-discovery

To enable ATM PVC discovery, use the atm ilmi-pvc-discovery interface configuration command. Use the no form of this command to disable PVC Discovery.

atm-ilmi-discovery [subinterface]
no atm-ilmi-discovery [subinterface]

Syntax Description

subinterface

(Optional) When this keyword is used, the discovered PVCs are assigned to the ATM subinterface whose number matches the discovered PVC's VPI number. For example, a PVC with VPI 1 will be assigned to ATM subinterface 2/0.1.

Default

Disabled

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3 T.

Example

The following example enables PVC Discovery on the ATM main interface 2/0. The keyword subinterface is used so that all discovered PVCs with a VPI value of 1 will be assigned to the subinterface 2/0.1:

interface atm 2/0
  pvc RouterA 0/16 ilmi
  exit
  atm ilmi-pvc-discovery subinterface
  exit
interface atm 2/0.1 multipoint
  ip address 172.21.51.5 255.255.255.0

atm lbo

To specify the cable length (line build-out) for the ATM interface, use the atm lbo interface configuration command. To return to the default, use the no form of this command.

atm lbo {long | short}
no atm lbo

Syntax Description

long

Specifies a cable length greater than 50 feet.

short

Specifies a cable length of less than 50 feet. This is the default.

Default

short

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.1 CA.

Example

The following example specifies that the ATM interface use a cable less than 50 feet:

interface atm 4/0
  atm lbo short

Related Commands

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

ces dsx1 lbo

atm max-channels

To configure the number of transmit channels for the interface, use the atm  max-channels interface configuration command. To return to the default, use the no form of this command.

atm max-channels number
no atm max-channels

Syntax Description

number

Maximum number of transmit channels for the interface. The range is 64 to 2048 channels.

Default

64 channels

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.1 CA.


Note The atm  max-channels command replaces the atm  tx-channels command.

The atm max-channels command can be used to divide the available number (fixed) of transmit descriptors across the configured number of transmit channels.Typically, you think of a one-to-one association between a transmit channel and a VC; however, the ATM-CES port adapter supports other types of VCs than data VCs (for example CES VCs). Also, the ATM-CES port adapter can multiplex one or more VCs over a single virtual path (VP) that is shaped, and the VP only requires a single transmit channel. Therefore, the term transmit channel is used rather then virtual circuit.

The maximum burst of packets that are allowed per VC is limited by the number of transmit descriptors allocated per VC. Because the total number of transmit descriptors available is limited by the available SRAM space, configuration of the number of transmit channels for the interface determines the number of transmit descriptors for each transmit channel. Hence the burst size for each transmit channel is determined by the atm max-channels command. For example, for 64 (default) numbers of transmit channels for the interface, 255 transmit descriptors are associated per transmit channel and for 512 numbers of transmit channels for the interface, 31 transmit descriptors are associated per transmit channel.

To display information about the transmit descriptors, use the show atm interface atm EXEC command.

Example

The following example sets the number of transmit descriptors for the interface to 120.

interface atm 2/0
  atm max-channels 120

Related Commands

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

show atm interface atm

atm maxvc

To set the ceiling value of the virtual circuit descriptor (VCD) on the ATM interface, use the atm maxvc interface configuration command. To restore the default value, use the no form of this command.

atm maxvc number
no atm maxvc

Syntax Description

number

Maximum number of supported virtual circuits. Valid values are 256, 512, 1024, or 2048. Default is 2048.

Default

2048 virtual circuits

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

This command is supported on Cisco  7500 series routers; it is not supported on the Cisco  4500 and Cisco  4700 routers, which have a fixed maximum of 1024.

This command sets the maximum value supported for the vcd argument in the atm pvc command. It also determines the maximum number of virtual circuits on which the AIP allows segmentation and reassembly (SAR) to occur. However, if you set a maxvc limit and then enter the atm pvc command with a larger value for the vcd argument, the software does not generate an error message.

This command does not affect the virtual path identifier (VPI)-virtual channel identifier (VCI) pair of each virtual circuit.

Example

The following example sets a ceiling VCD value of 1024 and restricts the AIP to supporting no more than 1024  virtual circuits:

atm maxvc 1024

Related Commands

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

pvc

atm mid-per-vc

To limit the number of message identifier (MID) numbers allowed on each virtual circuit, use the atm mid-per-vc interface configuration command.

atm mid-per-vc maximum

Syntax Description

maximum

Number of MIDs allowed per virtual circuit on this interface. The values allowed are 16, 32, 64, 128, 256, 512, and 1024. The default is 16 MIDs per virtual circuit.

Default

The default limit is 16 MIDs per virtual circuit.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

This command is supported on Cisco  7200 and 7500 series routers.

Message identifier (MID) numbers are used by receiving devices to reassemble cells from multiple sources into packets.

This command limits the number of discrete messages allowed on the PVC at the same time. It does not limit the number of cells associated with each message.

The maximum set by the atm mid-per-vc command overrides the range between the midhigh and midlow values set by the atm pvc command. If you set a maximum of 16 but a midlow of 0 and a midhigh of 255, only 16 MIDs (not 256) are allowed on the virtual circuit.

Example

The following example allows 64 MIDs per ATM virtual circuit:

atm mid-per-vc 64

Related Commands

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

pvc

atm multicast

To assign a Switched Multimegabit Data Service (SMDS) E.164 multicast address to the ATM subinterface that supports AAL3/4 and SMDS encapsulation, use the atm multicast interface configuration command.

atm multicast address

Syntax Description

address

Multicast E.164 address assigned to the subinterface.

Default

No multicast E.164 address is defined.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

This command is supported on Cisco  7500 series, Cisco  4500, and Cisco  4700 routers. This command is not supported on the ATM port adapter.

Each AAL3/4 subinterface is allowed only one multicast E.164 address. This multicast address is used for all protocol broadcast operations.

Example

The following example assigns a multicast E.164 address to the ATM subinterface that is being configured:

atm multicast e180.0999.000

Related Commands

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

abr
pvc
atm smds-address

atm multipoint-interval

To specify how often new destinations can be added to multipoint calls to an ATM switch in the network, use the atm multipoint-interval interface configuration command. To return to the default interval, use the no form of this command.

atm multipoint-interval interval
no atm multipoint-interval
interval

Syntax Description

interval

Interval length in seconds, in the range between 0 and 4294967. The default is 30 seconds.

Default

30 seconds

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

This command applies to SVCs only, not to PVCs.

This command has no effect unless ATM multipoint signaling is enabled on the interface.

Example

The following example enables point-to-multipoint signaling on the ATM interface 2/0. It also specifies that new destinations can be added to multipoint calls every 60 seconds:

interface atm 2/0
  atm multipoint-signalling
  atm multipoint-interval 60

Related Commands

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

atm multipoint-signalling

atm multipoint-signalling

To enable point-to-multipoint signaling to the ATM switch, use the atm multipoint-signalling interface configuration command. To disable point-to-multipoint signaling to the ATM switch, use the no form of this command.

atm multipoint-signalling
no atm multipoint-signalling

Syntax Description

This command has no keywords and arguments.

Default

Disabled

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

If multipoint signaling is enabled, the router uses existing static map entries that have the broadcast keyword set to establish multipoint calls. One call is established for each logical subnet of each protocol.

All destinations are added to the call. One multicast packet is sent to the ATM switch for each multipoint call. The ATM switch replicates the packet to all destinations.

The atm multipoint-interval command determines how often new destinations can be added to a multipoint call.

Example

The following example enables point-to-multipoint signaling on the ATM interface 2/0:

interface atm 2/0
  atm multipoint-signalling

Related Commands

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

atm multipoint-interval

atm nsap-address

To set the NSAP address for an ATM interface using SVC mode, use the atm nsap-address interface configuration command. The no form of this command removes any configured address for the interface.

atm nsap-address nsap-address
no atm nsap-address

Syntax Description

nsap-address

The 40-digit hexadecimal NSAP address of this interface (the source address).

Default

No NSAP address is defined for this interface.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

When you are configuring an SVC, you must use the atm nsap-address command to define the source NSAP address. It identifies a particular port on the ATM network and must be unique across the network.


Note When ILMI is configured, use the atm  esi-address command instead of the atm  nsap-address command. The atm esi-address and atm nsap-address commands are mutually exclusive. Configuring the router with the atm esi-address command negates the atm nsap-address setting, and vice versa.

Configuring a new address on the interface overwrites the previous address. The router considers the address as a string of bytes and will not prefix or suffix the address with any other strings or digits. The complete NSAP address must be specified, because this value is used in the Calling Party Address Information Element in the SETUP message to establish a virtual circuit.

ATM NSAP addresses have a fixed length of 40 hexadecimal digits. You must configure the complete address in the following dotted format:

xx.xxxx.xx.xxxxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx

Note All ATM NSAP addresses should be entered in the dotted hexadecimal format shown above, which conforms to the User-Network Interface (UNI) specification.The dotted method provides some validation that the address is a legal value. If you know your address format is correct, the dots may be omitted.

Example

In the following example, the source NSAP address for the interface is AB.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12:

atm nsap-address AB.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12

atm oam flush

To drop all current and future OAM cells received on an ATM interface, use the atm oam flush interface configuration command. Use the no form of this command to receive OAM cells on an ATM interface.

atm oam flush
no atm oam flush

Syntax Description

This command has no arguments or keywords.

Default

Dropping of OAM cells is disabled.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3 T.

Example

The following example drops all current and future OAM cells received on the ATM main interface with slot 0 and port 0:

interface atm 0/0
  atm oam flush

atm pvp

To create a permanent virtual path (PVP) used to multiplex (or bundle) one or more VCs (especially CES and data VCs), use the atm pvp interface configuration command. To remove a permanent virtual path, use the no form of this command.

atm pvp vpi [peak-rate]
no atm pvp vpi

Syntax Description

vpi

ATM network virtual path identifier (VPI) of the VC to multiplex on the permanent virtual path. The range is 0 to 255. The VPI is an 8-bit field in the header of the ATM cell. The VPI value is unique only on a single link, not throughout the ATM network because it has local significance only. The VPI value must match that of the switch.

The number specified for the vpi must not already exist. If the number specified for the vpi is already being used by an existing VC, this command is rejected.

peak-rate

(Optional) Maximum rate in kbps at which the PVP can transmit data. The range is 84  kbps to line rate. The default is the line rate.

Default

PVP is not configured.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.1 CA.

The ATM-CES port adapter supports multiplexing of one or more VCs over a virtual path that is shaped at a constant bandwidth. For example, you can buy a virtual path service from an ATM service provider and multiplex both the CES and data traffic over the virtual path.

All subsequently created VCs with a vpi matching the vpi specified with the atm pvp command are multiplexed onto this PVP. This PVP connection is an ATM connection where switching is performed on the VPI field of the cell only. A PVP is created and left up indefinitely. All VCs that are multiplexed over a PVP share and are controlled by the traffic parameters associated with the PVP.

Changing the peak-rate causes the ATM-CES port adapter to go down and then back up.

When you create a PVP, two VC are created (VCI 3 and 4) by default. These VCs are created for VP end-to-end loopback and segment loopback OAM support.

To verify the configuration of a PVP, use the show atm vp EXEC command.

Example

The following example creates a permanent virtual path with a peak rate of 2000 kbps. The subsequent VC created are multiplexed onto this virtual path.

interface atm 6/0
  atm pvp 1 2000
  atm pvc 13 1 13 aal5snap
  exit
interface cbr 6/1
  ces circuit 0
  ces pvc 9 interface atm6/0 vpi 1 vci 100
  exit

Related Commands

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

show atm vp

atm rate-queue

To create a permanent rate queue or specify a rate queue tolerance, use the atm rate-queue interface configuration command. The no form of this command removes a rate queue or rate queue tolerance.

atm rate-queue {queue-number speed | tolerance svc [pvc] tolerance-value [strict]}
no atm rate-queue {queue-number speed | tolerance svc [pvc] tolerance-value [strict]}

Syntax Description

queue-number

Queue number in the range 0 through 7 on the AIP for Cisco  7500 series routers, and in the range 0 through 3 on the NPM for Cisco  4500 and Cisco  4700 routers.

On the AIP, queues 0 through 3 are in the high-priority bank, and queues 4 through 7 are in the low-priority bank. Queues in the same priority bank have the same priority; for example, queues 0 and 3 have the same priority. On the NPM, all 4 queues have the same priority.

speed

Speed in megabits per second (Mbps) in the range from 1 through 155. The maximum speed is determined by the detected PLIM type on the AIP or NPM:

· 34 Mbps for E3

· 45 Mbps for DS-3

· 100 Mbps for Transparent Asynchronous Transmitter/Receiver Interface (TAXI)

· 155 Mbps for Synchronous Optical Network (SONET)

tolerance

Specifies that you want to use a rate queue tolerance value.

svc

Specifies that the tolerance-value will be applied to SVCs.

pvc

(Optional) If specified, the tolerance-value will be applied to PVCs.

tolerance-value

A tolerance level expressed as a percentage used for assigning rate queues for each VC with a requested peak rate. This value is applied to SVCs, discovered VCs, and PVCs (when the pvc keyword is used). This value can be 0 or 5 through 99. For SVCs and discovered VCs, the default value is 10. For PVCs, the default value is 0.

strict

(Optional) Indicates whether SVC traffic shaping parameters are altered beyond the SVC tolerance or rejects the incoming call.

Default

No rate queue is defined. The default rate-queue tolerance for SVCs and discovered VCs is 10. For PVCs, it is 0.

Command Mode

Interface configuration

Usage Guidelines

The atm rate-queue command first appeared in Cisco IOS Release 10.0. The tolerance svc keywords and associated arguments first appeared in Cisco IOS Release 11.3 T.

If a PVC or SVC is created, and its rate queue does not match a permanent rate queue that was created using the atm-rate queue queue-number speed command, one of the following will occur:

If you do not create permanent rate queues or if you create PVCs with peak or average rates that are not matched by the rate queues you configure, the software dynamically creates rate queues as necessary to satisfy the requests of the atm pvc commands.

You can create multiple rate queues. A warning message appears if all rate queues are deconfigured or if the combined rate queues exceed the PLIM rate.

Examples

The following example configures a permanent rate queue with a queue-number of 1 and a speed of 100 Mbps:

atm rate-queue 1 100

The following example configures a rate queue with a tolerance-value of 20 which will apply to SVCs, discovered VCs, and PVCs.

interface atm 2/0
atm rate-queue tolerance svc pvc 20

Related Commands

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

pvc
svc

atm rawq-size

To define the AIP raw-queue size, use the atm rawq-size interface configuration command. The no form of this command restores the default value.

atm rawq-size number
no atm rawq-size

Syntax Description

number

Maximum number of cells in the raw queue simultaneously, in the range 8 through 256. Default is 32.

Default

32 cells

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

This command is supported on the Cisco  7200 and 7500 series routers, but not on the Cisco  4500 and Cisco  4700 routers.

The raw queue is used for raw ATM cells, which include OAM (F4 and F5) and Interim Local Management Interface (ILMI) cells.

Example

The following example allows a maximum of 48 cells in the raw queue:

atm rawq-size 48

atm rxbuff

To set the maximum number of receive buffers for simultaneous packet reassembly, use the atm  rxbuff interface configuration command. The no form of this command restores the default value.

atm rxbuff number
no atm rxbuff

Syntax Description

number

Maximum number of packet reassemblies that the AIP can perform simultaneously, in the range 0 through 512. Default is 256.

Default

256 packet reassemblies

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

This command is supported on AIP for Cisco  7500 series routers. This command is not supported on the ATM port adapter for Cisco 7200 and 7500 series routers, nor is it supported on Cisco  4500 and Cisco  4700 routers.

Example

The following example allows the AIP to perform a maximum of 300 packet reassemblies simultaneously:

atm rxbuff 300

atmsig close atm

To disconnect an SVC, use the atmsig close atm EXEC command.

atmsig close atm slot/0 vcd (for the AIP on Cisco  7500 series routers; for the ATM port adapter,
ATM-CES port adapter, and enhanced ATM port adapter on Cisco  7200 series routers;
for the 1-port ATM-25 network module on Cisco  2600 and 3600 series routers)
atmsig close atm slot/port-adapter/0 vcd (for the ATM port adapter and enhanced ATM port adapter on Cisco 7500 series routers)
atmsig close atm number vcd (for the NPM on Cisco  4500 and Cisco  4700 routers)

Syntax Description

slot

ATM slot number. Use this format for the following platform configurations:

· AIP on Cisco 7500 series routers.

· ATM port adapter, ATM-CES port adapter, or enhanced ATM port adapter on Cisco  7200 series routers.

· 1-port ATM-25 network module on Cisco 2600 and 3600 series routers.

/0

ATM port number. Because the AIP and all ATM port adapters have a single ATM interface, the port number is always 0.

vcd

Virtual circuit descriptor of the signaling SVC to close.

slot/port-adapter

ATM slot number and port adapter number. Use this format for the ATM port adapter or ATM-CES port adapter on Cisco  7500 series routers.

number

ATM network processor module number for the NPM on Cisco  4500 and Cisco  4700 routers.

Command Mode

EXEC

Usage Guidelines

The atmsig close atm slot/0 vcd command first appeared in Cisco IOS Release 10.3.
The atmsig close atm number vcd command first appeared in Cisco IOS Release 11.1

Execute this command if you want to close a particular SVC. Because virtual circuits are numbered per interface, you must specify the ATM interface by its slot number.

Example

The following example closes SVC 2 on ATM interface 4/0:

atmsig close atm4/0 2

atm sig-traffic-shaping strict

To specify that an SVC should be established on an ATM interface only if shaping can be done per the signaled traffic parameters, use the atm sig-traffic-shaping strict interface configuration command. To disable strict traffic shaping, use the no form of this command.

atm sig-traffic-shaping strict
no atm sig-traffic-shaping

Default

The default value is lenient (not strict) traffic shaping for SVCs.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

This command is supported on the Cisco  7500 series routers, Cisco  4500 routers, and Cisco  4700 routers. This command is not supported on the ATM port adapter.

If strict traffic-shaping is configured on the router ATM interface, then an SVC is established only if traffic shaping can be provided for the transmit cell flow per the signaled traffic parameters. If such shaping cannot be provided, the SVC is released.

If strict traffic-shaping is not configured on the router ATM interface, an attempt is made to establish an SVC with traffic shaping for the transmit cell flow per the signaled traffic parameters. If such shaping cannot be provided, the SVC is installed with default shaping parameters (behaves as though a PVC were created without specifying traffic parameters).

The signaling SETUP message carries the forward and backward traffic parameters. For connections initiated by the source router, traffic is shaped to the SETUP message forward parameters. For connections initiated by another router/host, traffic is shaped to the backward parameters.

Example

The following example allows an SVC to be established on an ATM interface using only signaled traffic parameters:

atm sig-traffic-shaping strict

atm smds-address

To assign a unicast E.164 address to the ATM subinterface that supports AAL3/4 and SMDS encapsulation, use the atm smds-address interface configuration command.

atm smds-address address

Syntax Description

address

Unicast E.164 address assigned to the subinterface.

Default

No E.164 address is assigned.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

This command is supported on Cisco  7500 series routers, Cisco  4500 routers, and Cisco  4700 routers. This command is not supported on the ATM port adapter.

Each AAL3/4 subinterface is allowed only one unicast E.164 address.

Example

The following example assigns a unicast E.164 address to the ATM subinterface that is being configured:

atm smds-address c141.555.1212

Related Commands

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

abr
atm multicast
pvc

atm sonet stm-1

To set the mode of operation and thus control type of ATM cell used for cell-rate decoupling on the SONET PLIM, use the atm sonet stm-1 interface configuration command. The no form of this command restores the default Synchronous Transport Signal level 3, concatenated (STS-3c) operation.

atm sonet stm-1
no atm sonet stm-1

Syntax Description

stm-1

Synchronous Digital Hierarchy/Synchronous Transport Signal level 1 (SDH/STM-1) operation (ITU-T specification).

Default

STS-3c

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

Use STM-1 in applications where the ATM switch requires "idle cells" for rate adaptation. An idle cell contains 31 zeros followed by a one.

Use the default (STS-3c) in applications where the ATM switch requires "unassigned cells" for rate adaptation. An unassigned cell contains 32 zeros.

Example

The following example specifies ATM SONET STM-1:

atm sonet stm-1


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