CLI Reference Guide

MLAG 623
Default Configuration
LAGs are not members of an MLAG domain by default. It is expected that all
links belonging to an MLAG instance are connected to switch (or switches)
which consider the links to be members of a single LAG.
This configuration must be present on both the primary and secondary
switches.
The port channel number and VPC number can be different from each other
but the mapping must be the same on the primary and secondary MLAG
peers (i.e., the port channel number must map to the same VPC number on
both MLAG peers).
Command Modes
Port-channel mode
User Guidelines
The peer keep-alive protocol is required for MLAG operation. Configure a
LAG between the two MLAG peers as an MLAG peer link before executing
this command.
Example
console(config)#interface po3
console(config-if-Po3)#switchport mode trunk
console(config-if-Po3)#switchport trunk allowed vlan 1-99,101-4093
console(config-if-Po3)#vpc 2
console(config-if-Po3)#exitconsole(config)#interface po3
console(config-if-Po3)#switchport mode trunk
console(config-if-Po3)#switchport trunk allowed vlan 1-99,101-4093
console(config-if-Po3)#vpc 2
console(config-if-Po3)#exit
vpc domain
Use the vpc domain command to enter into MLAG configuration mode.
Syntax
vpc domain domain-id
• domain-id—The MLAG domain instance. The range is 1.
2CSNXXX_SWUM200.book Page 623 Tuesday, December 10, 2013 1:22 PM