In Cisco SD-WAN, which protocol is used to measure link quality?

A. BFD
B. RSVP
C. IPsec
D. OMP

In Cisco SD-WAN, which protocol is used to measure link quality?

A. BFD
B. RSVP
C. IPsec
D. OMP

Correct Answer: A

The BFD (Bidirectional Forwarding Detection) is a protocol that detects link failures as part of the Cisco SD-WAN (Viptela) high availability solution, is enabled by default on all vEdge routers, and you cannot disable it. 

The BFD mechanism is used by the WAN Edge routers to probe and measure the performance of the transport links.