Cisco
300-415 · Question #59
300-415 Question #59: Real Exam Question with Answer & Explanation
The correct answer is C: BFD. BFD (Bidirectional Forwarding Detection) is used in Cisco SD-WAN to continuously measure loss, latency, jitter, and liveness of IPsec tunnels between WAN Edge router peers.
WAN Edge Router Deployment
Question
Which protocol is used to measure loss, latency, jitter, and liveness of the tunnel between WAN Edge router peers?
Options
- AOMP
- BNetFlow
- CBFD
- DIP SLA
Explanation
BFD (Bidirectional Forwarding Detection) is used in Cisco SD-WAN to continuously measure loss, latency, jitter, and liveness of IPsec tunnels between WAN Edge router peers.
Common mistakes.
- A. OMP (Overlay Management Protocol) is the control plane protocol used to distribute routes and policies between vSmart and vEdge routers - it does not measure tunnel quality metrics.
- B. NetFlow is a traffic flow export protocol used for visibility and analytics, not for measuring tunnel loss, latency, or jitter.
- D. IP SLA can measure similar network metrics but is a separate Cisco feature not used natively between vEdge peers for SD-WAN tunnel quality monitoring.
Concept tested. BFD for SD-WAN tunnel quality measurement
Topics
#BFD#WAN Edge#Tunnel Monitoring#SD-WAN Data Plane
Community Discussion
No community discussion yet for this question.