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Spanning tree root ports in back to back VPC

mcg-tulsa
Level 1
Level 1

Ok so I have a question about back to back VPC configuration.

I have a back to back VPC from core to agg layer so that I have 2 logical switches in my path.

However I am seeing an issue on the agg layer.  Traffic is traversing the VPC peerlink instead of being sent up to the core which is where the spanning-tree root is configured.

Po1 is my uplink from the agg

Po4 is my vpc peerlink on the Agg

Po1              Root FWD 200       128.4096 (vPC) P2p

Po2              Desg FWD 200       128.4097 (vPC) P2p

Po4              Root FWD 330       128.4099 (vPC peer-link) Network P2p

Eth2/6           Altn BLK 2000      128.262  P2p

vpc.jpg

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