300-415 · Question #21
Refer to the exhibit. What does the BFD value of 8 represent? Hostname State System IP Reachability Site ID Device Model BFD Control BR1-VEDGE1 10.3.0.1 reachable 300 vEdge Cloud 8 5
The correct answer is D. number of BFD sessions. The BFD value of 8 in the exhibit represents the total number of BFD sessions established on the device.
Question
Options
- Adead timer of BFD session
- Bpoll-interval of BFD session
- Chello timer of BFD session
- Dnumber of BFD sessions
How the community answered
(27 responses)- A7% (2)
- C4% (1)
- D89% (24)
Why each option
The BFD value of 8 in the exhibit represents the total number of BFD sessions established on the device.
The dead timer is a duration, not a count, and specifies how long a device waits for a BFD packet before declaring a neighbor down.
The poll-interval is a timing parameter for BFD, specifically controlling how often packets are sent under certain conditions, not a count of sessions.
The hello timer is a timing parameter for BFD, representing the interval at which hello packets are sent to a neighbor.
In Cisco SD-WAN, the 'BFD Control' column within device monitoring typically indicates the number of active BFD sessions established between the device and its peers. A value of 8 signifies that there are eight BFD sessions currently active and monitored for that specific device.
Concept tested: Interpreting BFD session statistics in Cisco SD-WAN.
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