Cisco
300-440 · Question #71
Refer to the exhibit. An engineer troubleshoots a Cisco Catalyst SD-WAN connectivity issue between an on-premises data center and a public cloud provider WAN Edge device. The engineer discovers that…
The correct answer is C. The remote Edge device failed to respond to the BFD keepalive. The log shows a BFD state change with the reason "timeout," which means the remote Edge device did not respond to BFD keepalive messages. This causes the BFD tunnel to flap, indicating loss of connectivity or responsiveness from the remote device.
Operation
Question
Refer to the exhibit. An engineer troubleshoots a Cisco Catalyst SD-WAN connectivity issue between an on-premises data center and a public cloud provider WAN Edge device. The engineer discovers that the BFD tunnel is flapping on vEdge1. What is the problem?
Exhibit
Options
- AThe remote Edge device has a duplicate IP address.
- BThe control plane deleted the BFD session.
- CThe remote Edge device failed to respond to the BFD keepalive.
- DThe remote Edge device BFD is down.
How the community answered
(25 responses)- A28% (7)
- B16% (4)
- C48% (12)
- D8% (2)
Explanation
The log shows a BFD state change with the reason "timeout," which means the remote Edge device did not respond to BFD keepalive messages. This causes the BFD tunnel to flap, indicating loss of connectivity or responsiveness from the remote device.
Topics
#BFD#tunnel flapping#troubleshooting#SD-WAN
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