Refer to the exhibits. An engineer troubleshoots a Cisco SD-WAN connectivity issue between an on-premises data center WAN Edge and a public cloud provider WAN Edge. The engineer discovers that BFD…

The correct answer is B. The remote Edge device failed to respond BFD keepalives. The debug output shows that BFD is flapping on vEdge1 with the message bfd-state-change ... new-state: down ... reason:bfd-deleted. This indicates that the remote Edge device failed to respond to BFD keepalives. In Cisco SD-WAN, BFD continuously monitors data-plane liveliness…

Operation

Question

Refer to the exhibits. An engineer troubleshoots a Cisco SD-WAN connectivity issue between an on-premises data center WAN Edge and a public cloud provider WAN Edge. The engineer discovers that BFD is Dapping on vEdge1. What is the problem?

Exhibits

Options

AThe remote Edge device BFD is down.
BThe remote Edge device failed to respond BFD keepalives.
CThe remote Edge device has a duplicate IP address.
DThe control plane deleted the BFD session.

How the community answered

(15 responses)

A
27% (4)
B
53% (8)
C
7% (1)
D
13% (2)

Explanation

The debug output shows that BFD is flapping on vEdge1 with the message bfd-state-change ... new-state: down ... reason:bfd-deleted. This indicates that the remote Edge device failed to respond to BFD keepalives. In Cisco SD-WAN, BFD continuously monitors data-plane liveliness, and if acknowledgments are missed, the session flaps.

Topics

#BFD#SD-WAN troubleshooting#WAN Edge#BFD keepalives

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