nanog mailing list archives

Re: Multi-homed clients and BGP timers


From: Florian Weimer <fw () deneb enyo de>
Date: Mon, 25 May 2009 22:09:40 +0200

* Danny McPherson:

On May 25, 2009, at 11:33 AM, Florian Weimer wrote:

* Iljitsch van Beijnum:

30 60 isn't a good choice because that means that after 30.1
seconds a
keepalive comes in and then after 60.0 seconds the session will
expire
while the second one would be there in 60.1 seconds.

Wouldn't the underlying TCP retry sooner than that?

I suspect that given update messages serve as implicit
keepalives, it's _extremely rare that an actual keepalive
message is needed in global routing environments.

See the subject of this thread. 8-) I don't think we're talking about
full tables here, so you actually have to rely on keepalives
(plus TCP retransmits).


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