What is the default value for the Multiplier field of the BFD basic configuration in vManage?

The correct answer is D. 6. In Cisco SD-WAN, the BFD Multiplier defines how many consecutive BFD hello packets must be missed before a tunnel is declared down. The default value is 6. Combined with the default BFD poll interval (1000 ms), this means a tunnel failure is detected after 6 missed hellos…

Router Deployment

Question

What is the default value for the Multiplier field of the BFD basic configuration in vManage?

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How the community answered

(33 responses)

A
6% (2)
B
3% (1)
C
3% (1)
D
88% (29)

Explanation

In Cisco SD-WAN, the BFD Multiplier defines how many consecutive BFD hello packets must be missed before a tunnel is declared down. The default value is 6. Combined with the default BFD poll interval (1000 ms), this means a tunnel failure is detected after 6 missed hellos - roughly 6 seconds by default. This relatively conservative default prevents false positives on transient WAN flaps. The multiplier can be tuned lower for faster failure detection at the cost of greater sensitivity to brief packet loss.

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#BFD#vManage#Default values#SD-WAN configuration

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