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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.

Management and Operations

Question

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

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)
  • A
    7% (2)
  • C
    4% (1)
  • D
    89% (24)

Why each option

The BFD value of 8 in the exhibit represents the total number of BFD sessions established on the device.

Adead timer of BFD session

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.

Bpoll-interval of BFD session

The poll-interval is a timing parameter for BFD, specifically controlling how often packets are sent under certain conditions, not a count of sessions.

Chello timer of BFD session

The hello timer is a timing parameter for BFD, representing the interval at which hello packets are sent to a neighbor.

Dnumber of BFD sessionsCorrect

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.

Source: null

Topics

#BFD#SD-WAN Control Plane#WAN Edge Operations#Network Monitoring

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