Which protocol is configured on tunnels by default to detect loss, latency, jitter, and path failures in Cisco SD-WAN?

The correct answer is B. BFD. Bidirectional Forwarding Detection (BFD) is automatically enabled on all IPsec tunnels in Cisco SD-WAN by default. BFD sends hello packets across each tunnel at a configured interval and uses these probes to continuously measure loss, latency, and jitter on every path. When BFD…

WAN Edge Router Deployment

Question

Which protocol is configured on tunnels by default to detect loss, latency, jitter, and path failures in Cisco SD-WAN?

Options

ATLS
BBFD
COMP
DBGP

How the community answered

(19 responses)

B
89% (17)
C
5% (1)
D
5% (1)

Explanation

Bidirectional Forwarding Detection (BFD) is automatically enabled on all IPsec tunnels in Cisco SD-WAN by default. BFD sends hello packets across each tunnel at a configured interval and uses these probes to continuously measure loss, latency, and jitter on every path. When BFD detects that a path has exceeded its thresholds or gone down entirely, it reports the failure to the OMP process so traffic can be rerouted. TLS secures control-plane connections, OMP distributes routing information, and BGP is a traditional routing protocol - none of them perform real-time data-plane path health monitoring the way BFD does.

Topics

#Cisco SD-WAN#BFD#Tunnel Monitoring#WAN Edge Routers

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