Broadcom-VMware
3V0-25.25 · Question #9
3V0-25.25 Question #9: Real Exam Question with Answer & Explanation
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Question
An administrator is troubleshooting BGP flapping in a VMware Cloud Foundation (VCF) 9 environment. A Tier-0 Gateway is running in Active/Active mode with two Edge nodes. BFD is enabled on the eBGP sessions to the upstream routers. Each Edge node uses its own uplink IP for BGP. After some network maintenance, one BGP session starts flapping every few minutes. The other BGP sessions stay stable. On the affected Edge node, the command get bfd-sessions shows: - State: Down - Diag: Detect Time Expired Symptoms: - The upstream router also shows the BFD session as Down with control Detection Time Expired. - There are no interface errors, no packet loss for normal traffic, and clearing the BFD session temporarily brings it back up - but it flaps again after few minutes. What is the root cause?
Options
- ABFD timers are mismatched between Tier-0 Gateway and the upstream routers.
- BThe MTU does not match on the end-to-end between Tier-0 Gateway and upstream routers.
- CBFD is configured in echo mode on the upstream routers.
- DThe Edge nodes are undersized and are experiencing high contention on CPU and drops BFD
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