When the Hold Time supported by two devices running BGP is inconsistent, the neighbors will negotiate to use the smaller time as the Hold Time interval.

The correct answer is A. TRUE. BGP Hold Time negotiation works by having each peer advertise its preferred Hold Time in the OPEN message, and the lower of the two values is selected as the negotiated Hold Time - so A (TRUE) is correct. This is defined in RFC 4271: if the two peers advertise different Hold…

IPv4 Routing Technologies

Question

When the Hold Time supported by two devices running BGP is inconsistent, the neighbors will negotiate to use the smaller time as the Hold Time interval.

Options

ATRUE
BFALSE
C
D

How the community answered

(39 responses)

A
79% (31)
B
3% (1)
C
10% (4)
D
8% (3)

Explanation

BGP Hold Time negotiation works by having each peer advertise its preferred Hold Time in the OPEN message, and the lower of the two values is selected as the negotiated Hold Time - so A (TRUE) is correct. This is defined in RFC 4271: if the two peers advertise different Hold Times, the smaller value wins to ensure both sides agree on a conservative timeout that both can honor. Option B is wrong because BGP does not use the larger value or require matching values; it deliberately selects the minimum to prevent premature session expiration on the side with the shorter timer.

Memory tip: Think of Hold Time negotiation like two people agreeing on a meeting deadline - you always go with the tighter deadline so neither person misses it. "Lower wins" = the safest common ground.

Topics

#BGP#Hold Time#Neighbor Negotiation#Timer Parameters

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