Refer to the exhibit. A network engineer must improve the convergence time during vPC primary peer device failure and recovery. Which set of actions is required on both vPC switches to accomplish this task?
A.
Configure the same system priority. Enable LACP toward the access switches.
B.
Configure the same STP priority. Enable the peer-switch feature.
C.
Configure vPC role priority. Enable the peer-gateway feature.
D.
Configure port channels with BPDU guard. Globally enable the loop guard feature.
The vPC peer switch is introduced to address performance concerns around these STP convergence events. This
feature allows a pair of Cisco Nexus 7000 Series devices to appear as a single STP root in the Layer 2 topology. In
the vPC peer switch mode, STP BPDUs are sent from both vPC peer devices.
Answer B is right.
In addition to Arch_Angel's explanation, see link below: "Before enabling a vPC peer switch the Spanning Tree priority for all the VLANs MUST BE the same on both vPC peer devices."
https://community.cisco.com/kxiwq67737/attachments/kxiwq67737/4436-docs-data-center/727/1/90028-vPC%20Peer%20Switch%20Deployment%20Options.pdf
Answer is B
vPC Peer Switch
The vPC peer switch feature was added to Cisco NX-OS to address performance concerns around STP
convergence. This feature allows a pair of Cisco Nexus 9000 Series devices to appear as a single STP root in
the Layer 2 topology. This feature eliminates the need to pin the STP root to the vPC primary switch and
improves vPC convergence if the vPC primary switch fails.
To avoid loops, the vPC peer link is excluded from the STP computation. In vPC peer switch mode, STP
BPDUs are sent from both vPC peer devices to avoid issues related toSTP BPDU timeout on the downstream
switches, which can cause traffic disruption.
This feature can be used with the pure peer switch topology in which the devices all belong to the vPC.
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samfab
3 weeks, 2 days agoGoForCCNP
2 months, 3 weeks agogaz1978
4 months agoArch_Angel
5 months agoSysAd
5 months ago