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
bundleID |
ID number of the multilink interface bundle. Range is from 1 through 1023. |
Defaults
No default behavior or values
Command Modes
Interface configuration
Command History
|
|
Release 3.4.1 |
This command was introduced on the Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
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
interface-path-id |
Physical interface or virtual interface. Note Use the show interfaces command to see a list of all interfaces currently configured on the router. For more information about the syntax for the router, use the question mark (?) online help function. |
Defaults
No default behavior or values
Command Modes
Global configuration
Command History
|
|
Release 3.6.0 |
This command was introduced on the Cisco CRS-1 router and Cisco XR 12000 Series Router. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
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
interface-path-id |
Physical interface or virtual interface. Note Use the show interfaces command to see a list of all interfaces currently configured on the router. For more information about the syntax for the router, use the question mark (?) online help function. |
bundleId |
Bundle ID number of the multilink interface bundle. |
.subinterface |
Subinterface instance. Naming notation is .subinterface. The period in front of the subinterface value is required as part of the notation. Replace subinterface with the virtual interface number to be associated with the physical interface. For more information about the syntax for the router, use the question mark (?) online help function. |
type |
Interface type. For more information, use the question mark (?) online help function. |
point-to-point |
Interface functions as one endpoint of a point-to-point link. |
l2transport |
Interface functions as one endpoint on an Layer 2 link. |
Defaults
No interfaces are configured.
Command Modes
Global configuration
Command History
|
|
Release 3.6.0 |
This command was introduced on the Cisco CRS-1 router and the Cisco XR 12000 Series Router. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
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
|
|
show interfaces |
Displays statistics for all interfaces configured on the router or for a specific node. |
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
|
|
Release 3.4.1 |
This command was introduced on the Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
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
value |
Value of the fragment size. The allowed values are determined by the hardware. In the current release, the allowed values are 128, 256 and 512. The value 64 also appears in the CLI help for this parameter. However, 64 is not allowed in this release and will cause configuration problems in the system if used. |
Defaults
The default is no multilink fragment-size, which means no fragmentation at Layer 2.
Command Modes
Interface configuration
Command History
|
|
Release 3.4.1 |
This command was introduced on the Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
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
bundleID |
Bundle ID number of the multilink interface, in the format rack/slot/bay/controllerID/bundleID) |
Defaults
No default behavior or values
Command Modes
Interface configuration
Command History
|
|
Release 3.4.1 |
This command was introduced on the Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
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
|
|
Release 3.5.0 |
This command was introduced on the Cisco XR 12000 Series Router. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
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
value |
Number of active links. The range is 1 through 12. |
Defaults
The default value is 1 active link.
Command Modes
Global configuration
Command History
|
|
Release 3.4.1 |
This command was introduced on the Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
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
interface-path-id |
Physical interface or virtual interface. Note Use the show interfaces command to see a list of all interfaces currently configured on the router. For more information about the syntax for the router, use the question mark (?) online help function. |
Defaults
No default behavior or values
Command Modes
EXEC
Command History
|
|
Release 3.6.0 |
This command was introduced on the Cisco CRS-1 router and the Cisco XR 12000 Series Routers. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
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
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
interface-path-id |
Physical interface or virtual interface. Note Use the show interfaces command to see a list of all interfaces currently configured on the router. For more information about the syntax for the router, use the question mark (?) online help function. |
Defaults
No default behavior or values
Command Modes
EXEC
Command History
|
|
Release 3.6.0 |
This command was introduced on the Cisco CRS-1 router and the Cisco XR 12000 Series Routers. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
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