interface lag multi-chassis

interface lag <LAG-ID> multi-chassis [static] no interface lag <LAG-ID>

Description

Configures a given LAG as a dynamic multichassis LAG (VSX LAG), which supports a maximum of four member links per switch segment. A VSX LAG across a downstream switch can have at most a total of eight member links.

The no form of this command removes a VSX LAG.

Parameter

Description

<LAG-ID>

Specifies the LAG ID. Run the show capacities vsx command for the maximum number of VSX LAGs supported for your particular type of switch; however, the maximum VSX LAG value considers that one port is used for the ISL, which is not a VSX LAG. Required.

static

Specifies the multichassis LAG as static. Optional.

Usage

A VSX LAG across a VSX pair can have at most a total of 16 interfaces.

  • When creating a VSX LAG, select an equal number of member links in each segment for load balancing, such as four member links (one segment) and four member links (another segment). Do not create a VSX LAG with four member links in one switch and two member links on another segment. A switch can have a maximum of four member links.
  • Make sure that the VSX LAG interface on both the VSX primary and secondary switches has a member port configured and enabled.
  • Make sure that you also have a non-VSX port that is available for the ISL.
  • It is recommended to use hashing algorithm value as l3-src-dst (default) or l2-src-dst on the VSX LAG.

You cannot change the mode of a multichassis LAG without removing the multichassis LAG first. To change a pre-existing VSX LAG to a static VSX LAG, first remove the VSX LAG with the no interface lag <LAG-ID> command. Then, enter the interface lag <LAG-ID> multi-chassis static command.

Examples

Configuring LAG 100 as a VSX LAG:

switch(config)# interface lag 100 multi-chassis

Removing LAG 100 as a VSX LAG:

switch(config)# no interface lag 100

Specifying LAG 100 as a static VSX LAG:

switch(config)# interface lag 100 multi-chassis static

For more information on features that use this command, refer to the Virtual Switching Extension (VSX) Guide for your switch model.

Command History

Release

Modification

10.07 or earlier

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Command Information

Platforms

Command context

Authority

10000

config

Administrators or local user group members with execution rights for this command.