Users Guide

Layer 2 Switching Commands 655
Default Configuration
By default, no MLAG domains are configured.
Command Modes
Global Configuration mode
User Guidelines
Only one MLAG domain per MLAG is supported. This command creates a
VPC domain with the specified domain-id and enters into the VPC domain
configuration mode. Only one VPC domain can be created on a given device.
The domain-id of the VPC domain should be equal to the one configured on
the other VPC peer with this device wants to form a VPC pair. The configured
VPC domain-ids are exchanged during role election and if they are configured
differently on the peer devices, then VPC does not become operational.
The administrator needs to ensure that the no two VPC domains share the
same VPC domain-id. The domain-id is used to derive the auto-generated
VPC MAC address used in the actor ID field in the LACP PDUs and STP
BPDUs sent out on VPC interfaces. If two VPC domains have the identical
domain-ids, the resulting actor IDs may lead to LACP or STP convergence
issues.
Example
console(config)#vpc domain 1
console(config-vpc 1)#peer-keepalive enable
console(config-vpc 1)#peer-keepalive destination 192.168.0.2 source
192.168.0.1
console(config-vpc 1)#peer detection enable
console(config-vpc 1)#exit
vpc peer-link
Use the vpc peer-link command to configure a port channel as the MLAG
peer link for a domain and enables the peer link protocol.
Use the no form of the command to remove the peer link configuration from
an MLAG domain and disable the peer link protocol.