Peer Link Upgrade Q's?

[davidstillert]

My nexus 5010's were originally setup with 2 - 1gig links as the vpc peer link but I've purchased two twinax cables so I can upgrade the peer link to 2-10gig links.  My question is regarding downtime.  Is it possible to turn up the two new links as a new portchannel as a secondary peer link?   Will spanning tree just failover to my new peer link as the path cost is lower?    I know it won't take long to shut down the old peer link and bring up the new but I'd like to do this with no disruption.

Thanks, Guys!

Dave

[krun_shah · Accepted solution]

It is not possible to add new 10 gig link into existing portchannel because speed is diff than your 2 x 1 gig portchannels. You have to shut down old port channel and remove vpc peerlink commad from interface. Then build new port channel using new 10 gig links and apply vpc peer-link command. Since you have to break vpc peerlink secondary vpc peer will suspend its vpc member ports. During this process spanning tree will be affected if you have any L2 orphan ports commected to othr swith. You also might want use spanning-tree pathcost method long commnd.

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