Administrator Guide

Important Points about Shared LAG State Tracking
The following is more information about shared LAG state tracking.
• This feature is available for static and dynamic LAGs.
• Only a LAG can be a member of a failover group.
• You can configure shared LAG state tracking on one side of a link or on both sides.
• If a LAG that is part of a failover group is deleted, the failover group is deleted.
• If a LAG moves to the Down state due to this feature, its members may still be in the Up state.
LACP Basic Configuration Example
The screenshots in this section are based on the following example topology. Two routers are named ALPHA and BRAVO, and their
hostname prompts reflect those names.
Figure 63. LACP Basic Configuration Example
Configure a LAG on ALPHA
The following example creates a LAG on ALPHA.
Example of Configuring a LAG
Alpha(conf)#interface port-channel 10
Alpha(conf-if-po-10)#no ip address
Alpha(conf-if-po-10)#switchport
Alpha(conf-if-po-10)#no shutdown
Alpha(conf-if-po-10)#show config
!
interface Port-channel 10
no ip address
switchport
no shutdown
!
Alpha(conf-if-po-10)#
Example of Viewing a LAG Port Configuration
The following example inspects a LAG port configuration on ALPHA.
Alpha#sh int TenGigabitEthernet 2/31
TenGigabitEthernet 2/31 is up, line protocol is up
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Link Aggregation Control Protocol (LACP)