Exam 400-151 topic 1 question 114 discussion

ah it is D: Required Recommendations: ● Enable BPDU filter on the vPC used for DCI (under the port-channel configuration, activate the following command: spanning-tree bpdufilter enable) to avoid BPDU propagation ● Configure the vPC used for DCI as spanning-tree port type edge (i.e port fast) to fasten port state forwarding mode when port is operationnaly up ● Remember by default vPC peer-link runs in spanning-tree port type network i.e bridge assurance is activated on the link ● Configure root guard on aggregation vPC domain (more exactly on vPC between this vPC domain and DCI vPC domain). ● Do not use bridge assurance for interconnect vPC (DCI vPC)

When user configures the port-channel as vPC peer-link (adding keyword “vpc peer-link”), the system automatically turns on Bridge Assurance on the link. Bridge Assurance is a STP extension that protects L2 network from any unidirectional link event caused by physical cable failure or adjacent switch control plane failure.