Exam 300-510 topic 1 question 64 discussion

Actual exam question from Cisco's 300-510

Question #: 64
Topic #: 1

After an engineer configures BGP in R1, it starts receiving this message:

Which action makes the peering come back up again?

A. Make a soft reset to the peer
B. Set up a hello timer higher
C. Set up a hold-down timer higher
D. Set up a minimum hold-down timer higher

Show Suggested Answer

Suggested Answer: C 🗳️

by Redo_67 at April 7, 2023, 3:25 p.m.

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snowbow

7 months ago

Selected Answer: D

I believe this should be D, if your router is sending the 'unacceptable hold time' message, that means that the remote router is advertising a hold time that is too low. If we assume that we can only change R1, we have to set a lower minimum hold-down timer so that the peering can establish.

upvoted 1 times

snowbow

7 months ago

Disregard, I read option D wrong

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serban_17

9 months ago

you have to configure the smaller hold-down timer higher (when establishing a BGP session, the routers use the smaller hold time value contained in the two routers’ open messages) So D makes sense considering minimum = smaller

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DUsoo

1 year, 1 month ago

Selected Answer: C

You have to configure hold-down timer higher!

upvoted 3 times

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Redo_67

1 year, 8 months ago

C is correct When the minimum acceptable hold-time is configured on a BGP router, a remote BGP peer session is established only if the remote peer is advertising a hold-time that is equal to, or greater than, the minimum acceptable hold-time interval. If the minimum acceptable hold-time interval is greater than the configured hold-time, the next time the remote session tries to establish, it will fail and the local router will send a notification stating "unacceptable hold time." https://www.cisco.com/c/en/us/td/docs/ios/iproute_bgp/command/reference/irg_book/irg_bgp4.html

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