Configuring Link Aggregation 943
b
Configure the timeout interval, if desired.
vpc domain 1
role 10
exit
Modifications to priority and timeout interval are effective only before the
keep-alive protocol is enabled. Once enabled, MLAG switches contest in
an election to select the primary and secondary switch. The election is
non-preemptive.
3
Configure the peer-link. On each MLAG peer:
• Configure a port-channel as the peer-link for the MLAG devices. It is
recommended that the administrator use dynamic LAGs as port-
channels.
• It is strongly recommended that the MLAG peer LAG consist of
multiple physical links with sufficient bandwidth to carry all MLAG
traffic expected to be carried by either MLAG peer.
• Disable spanning tree on the peer-link.
• Enable trunking on the peer-link. Remove any non-MLAG VLANs
from the peer-link trunk port. VLANs cannot be configured to contain
both MLAG ports and non-MLAG (non-redundant) ports.
• Ensure that the peer-link has a native VLAN configured.
• Optionally, configure UDLD on the peer-link to detect and shut down
unidirectional links.
• Associate the port-channel with physical links.
interface port-channel 1
description "MLAG-Peer-Link"
spanning-tree disable
switchport mode trunk
vpc peer-link
exit
interface range te1/0/1-2
channel-group 1 mode active
description "MLAG-Peer-Link"
udld enable
udld port aggressive
exit
