nanog mailing list archives
RE: What Worked - What Didn't
From: Iljitsch van Beijnum <iljitsch () muada com>
Date: Tue, 18 Sep 2001 00:10:45 +0200 (CEST)
On Mon, 17 Sep 2001, Randy Bush wrote:
"The suggested value for the Hold Time is 90 seconds. The suggested value for the KeepAlive timer is 30 seconds."
the hello timer != noticing an interface has gone hard down, which i thought was your original point.
If there are no other means to detect the datalink session between two BGP speakers has gone south, the hold timer will do this. For POS and most other point-to-point links the "fast-external-fallover" will usually kick in sooner because datalink layer keepalives aren't received anymore (some advocate "no fast-external-fallover" to avoid flapping, though), but in switched environments such as Ethernet or ATM the interface may stay up while there is no connectivity. In those circumstances, the hold timer is the only thing that will break the BGP session eventually.
Current thread:
- RE: What Worked - What Didn't, (continued)
- RE: What Worked - What Didn't Randy Bush (Sep 17)
- Re: What Worked - What Didn't Chris Woodfield (Sep 17)
- Re: What Worked - What Didn't Randy Bush (Sep 17)
- Re: What Worked - What Didn't Leo Bicknell (Sep 17)
- RE: What Worked - What Didn't Iljitsch van Beijnum (Sep 17)
- Re: What Worked - What Didn't Mike Lewinski (Sep 17)
- Message not available
- Re: What Worked - What Didn't Mike Lewinski (Sep 17)
- RE: What Worked - What Didn't Randy Bush (Sep 17)
- RE: What Worked - What Didn't Iljitsch van Beijnum (Sep 17)
- RE: What Worked - What Didn't Randy Bush (Sep 17)
- RE: What Worked - What Didn't Iljitsch van Beijnum (Sep 17)
- Re: What Worked - What Didn't Jared Mauch (Sep 17)
- Re: What Worked - What Didn't Jeff Aitken (Sep 17)
- Re: What Worked - What Didn't John Kristoff (Sep 18)
- bgp md5 auth Randy Bush (Sep 17)
- Re: bgp md5 auth John Kristoff (Sep 18)
- Re: bgp md5 auth Randy Bush (Sep 18)