There is a spanning tree mismatch at the global level. PVST+ is configured on a VLT peer. All VLT port channels go down on both VLT peers. A syslog error message is generated. What is the correct action to resolve the issue?
A.
Verify the VLT LAG ID is configured correctly on both VLT peers.
B.
Enable RSTP on both VLT peers.
C.
Use the show VLT detail and show VLT brief commands to view the VLT port channel status information.
D.
Perform a mismatch check after the VLT peer is established.
Correct Answer is B:
https://www.dell.com/support/manuals/en-us/dell-emc-os-9/z9000_9.7.0.0_config_pub/troubleshooting-vlt?guid=guid-4b157a88-8351-4847-bef9-8598d3510436&lang=en-us
Correct answer is B. Spanning tree mode should be RSTP or Rapid PVST+.
https://infohub.delltechnologies.com/l/dell-emc-smartfabric-os10-virtual-link-trunking-reference-architecture-guide-1/spanning-tree-protocol-with-vlt-1
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