vPC and STP

[visitor68]

Hi - What;s the official Cisco recommendation regarding STP and vPC? A lot of people think that the ability to run MLAGs precludes the need to have STP running because no ports need to be blocked anymore...etc etc etc

But I believe Cisco still recommends running STP, notwithstanding...

Any thoughts?

Thanks

[Robert Burns]

Ex,

You'll still need STP.  If for some unforseen reason you have problems with the vPC peer, STP will kick in and save your network from melting.  That being said you're still recommended to enable portfast on host-facing vPCs.

Your host links may never need STP, but it's a good safety net if anything goes wrong.

Rob

[visitor68]

Rob, thanks...thats what I thought....its used as a backup.

I belive with Fabric Path, you can abandon STP altogether, right? Or whats the recommendation there....?

Thanks

[vdsudame]

yes instead of stp you run IS-IS. Note: This is not the same IS-IS as used in routing protocols. Fabric Path is L2 only.