Cisco IOS XR Commands by Software Package, Release 3.8.0

Multilink Commands on Cisco IOS XR Software

This module contains commands for configuring multilink interfaces on Cisco IOS XR software.

bundle

To create a multilink interface bundle, use the bundle command in the interface configuration mode. To remove a multilink interface bundle, use the no form of this command.

bundle bundleID

Syntax Description

Defaults

No default behavior or values

Command Modes

Interface configuration

Command History

Usage Guidelines

To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.

The bundle command is used in mgmtmultilink controller mode to dynamically create a multilink interface. This command is similar to the channel-group command on the T1 controller, which dynamically creates a serial interface.

Examples

The following example shows how to create a multilink interface with a bundle ID of 1:

RP/0/0/CPU0:router# configure

RP/0/0/CPU0:router(config)# controller mgmtmultilink 0/1/0/0

RP/0/0/CPU0:router(config-mgmtmultilink)# bundle 1

RP/0/0/CPU0:router(config-mgmtmultilink)# commit

Related Commands

controller MgmtMultilink

To configure a controller for a generic multilink bundle and enter MgmtMultilink configuration mode, use the controller MgmtMultilink command in global configuration mode. To return to the default state, use the no form of this command.

controller MgmtMultilink interface-path-id

no controller MgmtMultilink interface-path-id

Syntax Description

Defaults

No default behavior or values

Command Modes

Global configuration

Command History

Usage Guidelines

To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.

For the interface-path-id argument, use the following guidelines:

•If specifying a physical interface, the naming notation is rack/slot/module/port. The slash between values is required as part of the notation. An explanation of each component of the naming notation is as follows:

–rack: Chassis number of the rack.

–slot: Physical slot number of the line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

•If specifying a virtual interface, the number range varies, depending on interface type.

Examples

The following example shows how to enter the MgmtMultilink configuration mode :

RP/0/RP0/CPU0:router# config

RP/0/RP0/CPU0:router(config)# controller MgmtMultilink 0/1/0/0 

RP/0/RP0/CPU0:router(config-mgmtmultilink)# 

Related Commands

interface Multilink

To configure a multilink interface and enter multilink interface configuration mode, use the interface multilink command in global configuration mode. To delete the interface configuration, use the no form of this command. To return to the default state, use the no form of this command.

interface multilink interface-path-id/bundleId.subinterface type [point-to-point | l2transport ]

no interface multilink interface-path-id/bundleId.subinterface type [point-to-point | l2transport ]

Syntax Description

Defaults

No interfaces are configured.

Command Modes

Global configuration

Command History

Usage Guidelines

To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.

For the interface-path-id argument, use the following guidelines:

•If specifying a physical interface, the naming notation is rack/slot/module/port. The slash between values is required as part of the notation. An explanation of each component of the naming notation is as follows:

–rack: Chassis number of the rack.

–slot: Physical slot number of the line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

•If specifying a virtual interface, the number range varies, depending on interface type.

Examples

The following example shows how to enter interface configuration mode for multilink bundle interface:

RP/0/RP0/CPU0:router(config)# interface Multilink 0/1/0/0/100 

RP/0/RP0/CPU0:router(config-if)#

The following example shows how to enter subinterface configuration mode for multilink bundle subinterface:

RP/0/RP0/CPU0:router# configure

RP/0/RP0/CPU0:router(config)# interface Multilink 0/1/0/0/100.16 point-to-point 

RP/0/RP0/CPU0:router(config-subif)#

Related Commands

multilink

To enter the config-if-multilink submode, use the multilink command in the interface configuration mode.

multilink

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values

Command Modes

Interface configuration

Command History

Usage Guidelines

To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.

For multilink interfaces, the multilink command provides access to the config-if-multilink submode to use the multilink fragment-size command. For serial interfaces, this command provides access to the config-if-multilink submode to use the group command.

Note This command behaves similarly to the timeslots command. It is not be possible to enter this command or remove the multilink interface after the channel-group configuration is committed.

Examples

The following example shows how to enter the config-if-multilink submode:

RP/0/0/CPU0:router# configure

RP/0/0/CPU0:router(config)# interface serial 0/1/0/0/1:0

RP/0/0/CPU0:router(config-if)# multilink

RP/0/0/CPU0:router(config-if-multilink)# group 1

RP/0/0/CPU0:router(config-if-multilink)# commit

Related Commands

multilink fragment-size

To set the Layer 2 fragmentation size for a multilink interface as opposed to the Layer 3 fragment size, which is controlled by the mtu command, use the multilink fragment-size command in interface configuration mode. To set the fragment size back to the default, no fragment size, use the no form of this command.

multilink fragment-size value

no multilink fragment-size value

Syntax Description

Defaults

The default is no multilink fragment-size, which means no fragmentation at Layer 2.

Command Modes

Interface configuration

Command History

Usage Guidelines

To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.

Examples

The following example shows how to set the fragment size to 128:

RP/0/0/CPU0:router# configure

RP/0/0/CPU0:router(config)# interface multilink 0/1/0/0/1

RP/0/0/CPU0:router(config-if)# multilink fragmentation-size 128

RP/0/0/CPU0:router(config-if)# commit

Related Commands

multilink group

To attach a serial interface to a multilink interface bundle, use the multilink group command in interface configuration mode. To remove a serial interface from a multilink interface bundle, use the no form of this command.

multilink group bundleID

no multilink group bundleID

Syntax Description

Defaults

No default behavior or values

Command Modes

Interface configuration

Command History

Usage Guidelines

To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.

Examples

The following examples show how to attach a serial interface to a multilink interface bundle:

RP/0/0/CPU0:router# configure

RP/0/0/CPU0:router(config)# interface serial 0/1/0/0/1:0

RP/0/0/CPU0:router(config-if)# multilink group 1

RP/0/0/CPU0:router(config-if)# commit

or

RP/0/0/CPU0:router# configure

RP/0/0/CPU0:router(config)# interface serial 0/1/0/0/1:0

RP/0/0/CPU0:router(config-if)# multilink

RP/0/0/CPU0:router(config-if-multilink)# group 1

RP/0/0/CPU0:router(config-if-multilink)# commit

Related Commands

multilink interleave

To enable interleave on a multilink interface, use the multilink interleave command in interface configuration mode.

multilink interleave

Syntax Description

This command has no arguments or keywords.

Defaults

The default is no interleave.

Command Modes

Interface configuration

Command History

Usage Guidelines

To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.

Link Fragmentation and Interleaving (LFI) is designed for MLPPP interfaces and is required when integrating voice and data on low-speed interfaces that run at less than 768 Kbps.

Link Fragmentation and Interleaving (LFI) provides stability for delay-sensitive traffic, such as voice or video, traveling on the same circuit as data. Voice is susceptible to increased latency and jitter when the network processes large packets on low-speed interfaces that run at less than 768 Kbps. LFI reduces delay and jitter by fragmenting large datagrams and interleaving them with low-delay traffic packets.

Examples

The following examples show how to enable interleave on a multilink interface.

RP/0/0/CPU0:router# configuration 

RP/0/0/CPU0:router#(config)# interface multilink 0/1/0/0/1

RP/0/0/CPU0:router#(config-if)# multilink interleave

RP/0/0/CPU0:router#(config-if)# commit

or

RP/0/0/CPU0:router# configuration 

RP/0/0/CPU0:router#(config)# interface multilink 0/1/0/0/1

RP/0/0/CPU0:router#(config-if)# multilink

RP/0/0/CPU0:router#(config-if-multilink)# interleave

RP/0/0/CPU0:router#(config-if-multilink)# commit

Related Commands

ppp multilink minimum-active links

To set the minimum number of active links required before the multilink interface line can be brought to the up state, use the ppp multilink minimum-active links command in global configuration mode.

ppp multilink minimum-active links value

Syntax Description

Defaults

The default value is 1 active link.

Command Modes

Global configuration

Command History

Usage Guidelines

To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.

When multiple links are active and one link goes down, the whole bundle goes down.

Examples

The following example shows how to set the minimum number of active links to 6:

RP/0/0/CPU0:router# configure

RP/0/0/CPU0:router(config)# interface Multilink 0/1/0/0/1 

RP/0/0/CPU0:router(config-if)# ppp multilink minimum-active links 6

Related Commands

show controller mgmtmultilink

To display information about the state and the number of bundles of a multilink controller, use the show controller mgmtmultilink command in EXEC mode.

show controllers mgmtmultilink interface-path-id

Syntax Description

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Usage Guidelines

To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.

For the interface-path-id argument, use the following guidelines:

•If specifying a physical interface, the naming notation is rack/slot/module/port. The slash between values is required as part of the notation. An explanation of each component of the naming notation is as follows:

–rack: Chassis number of the rack.

–slot: Physical slot number of the line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

•If specifying a virtual interface, the number range varies, depending on interface type.

Examples

The following example shows how to display information for a management multilink controller:

RP/0/RP0/CPU0:Router# show controllers mgmtmultilink 0/1/0/0

Controller MgmtMultilink 0/1/0/0

  State is up

  Number of bundles: 0

Related Commands

show interfaces multilink

To display information about a multilink interface, use the show interfaces multilink command in EXEC mode.

show interfaces multilink interface-path-id

Syntax Description

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Usage Guidelines

To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.

For the interface-path-id argument, use the following guidelines:

•If specifying a physical interface, the naming notation is rack/slot/module/port. The slash between values is required as part of the notation. An explanation of each component of the naming notation is as follows:

–rack: Chassis number of the rack.

–slot: Physical slot number of the line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

•If specifying a virtual interface, the number range varies, depending on interface type.

Examples

The following example shows how to display information about a multilink interface:

RP/0/RP0/CPU0:router# show interfaces multilink interface 0/1/0/0