Huawei Exam H12-721 Topic 6 Question 88 Discussion

Actual exam question for Huawei's H12-721 exam

Question #: 88
Topic #: 6

USG A and USG B are configured with a static BFD session. The following is true about the process of establishing and tearing down a BFD session.

AUSG A and USG B each start the BFD state machine. The initial state is Down and the BFD packet is Down. The value of Your Discriminator is 0.

BAfter the local BFD status of B USG B is Init, if you continue to receive packets with the status Down, you can re-process and update its local status.

CAfter receiving the BFD packet in the init state, C USG B switches the local state to Up.

DAfter the state transition of 'DOWN-->INIT' occurs on D USG A and USG B, a timeout timer is started. If the BFD packet is in the Init or Up state, the local state is automatically switched back to Down.

Show Suggested Answer

Suggested Answer: C, D

Note: 1. USG A and USG B each start the BFD state machine. The initial state is Down and the BFD packet is Down. For a static BFD session, the value of the Your Discriminator is specified by the user. For the dynamic BFD session, the value of the Your Discriminator is 0. 2. After receiving the BFD packet whose status is Down, the USG B switches to Init. And send a BFD packet with the status of Init. 3. If the local BFD state of USG B is Init, the packets of the received state are Down. 4. The BFD state of USG A is the same as that of USG B. 5. After receiving the BFD packet in the Init state, the local state is switched to Up. 6. The BFD status of USG A changes with USG B. 7. After the state transition of 'DOWN-->INIT' occurs on USG A and USG B, a timeout timer is started. If the BFD packet is in the Init or Up state, the local state is automatically switched back to Down.

by Herman at May 31, 2024, 03:17 AM

Limited Time Offer

25%

Off

Get Premium H12-721 Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel

Antonio

3 months ago

Wait, so if the BFD session is static, does that mean we need to manually configure it every time? Sounds like a real pain in the BFD!

upvoted 0 times

...

Lyda

3 months ago

Okay, I think I've got it. If the 'DOWN-->INIT' transition happens, the timeout timer starts, and if the BFD packet is in the Init or Up state, the local state gets auAnnitaatically switched back to Down. That's going to be a tricky one to remember!

upvoted 0 times

...

Ena

3 months ago

Whoa, hold up! So if USG B switches to the Up state after receiving the BFD packet in the Init state, does that mean the session is finally established? I'm just trying to wrap my head around all these state transitions.

upvoted 0 times

Dorethea

2 months ago

The state transitions can be a bit confusing, but once it's Up, you're good to go.

upvoted 0 times

...

Pedro

2 months ago

Yes, once USG B switches to the Up state, the session is considered established.

upvoted 0 times

...

I think the correct answer is A. The BFD session starts in the Down state with a Discriminator value of 0.

upvoted 0 times

...