Symptom

+ BPDU timeout on VPC secondary switch after interface flaps 2021 May 10 09:41:32 93180-2 %STP-2-VPC_PEER_LINK_INCONSIST_BLOCK: vPC peer-link detected !BPDU receive timeout blocking port-channel448 VLAN1884. 2021 May 10 09:41:32 93180-2 %STP-2-VPC_PEER_LINK_INCONSIST_BLOCK: vPC peer-link detected !BPDU receive timeout blocking port-channel448 VLAN1885. 2021 May 10 09:41:32 93180-2 %STP-2-VPC_PEER_LINK_INCONSIST_BLOCK: vPC peer-link detected !BPDU receive timeout blocking port-channel448 VLAN1886. 2021 May 10 10:04:56 93180-2 %STP-2-VPC_PEER_LINK_INCONSIST_BLOCK: vPC peer-link detected !BPDU receive timeout blocking port-channel448 VLAN1822.

Conditions

+ Link flaps on any VPC port-channel

Workaround

+ Follow VPC recommendations and enable VPC `peer-switch` feature

Further Problem Description