Setup Guide
• 2d1h45m: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Po 2
To view the status of a failover group member, use the show interface port-channel command.
NOTE: The set of console messages shown above appear only if you congure shared LAG state tracking on that router (you can
congure the feature on one or both sides of a link). For example, as previously shown, if you congured shared LAG state
tracking on R2 only, no messages appear on R4 regarding the state of LAGs in a failover group.
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 congure 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 Conguration Example
The screenshots in this section are based on the following example topology. Two routers are named ALPHA and BRAVO, and their
hostname prompts reect those names.
Figure 63. LACP Basic Conguration Example
Congure a LAG on ALPHA
The following example creates a LAG on ALPHA.
Example of Conguring 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
466
Link Aggregation Control Protocol (LACP)