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Inter-Domain AS-Path failures
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Goetz Lichtwald
lichtwald at tm.uka.de
Mon Feb 28 16:35:51 CET 2005
On Mon, 2005-02-28 at 16:12 +0100, Daniel Roesen wrote: > On Mon, Feb 28, 2005 at 03:51:57PM +0100, Goetz Lichtwald wrote: > > On Mon, 2005-02-28 at 15:28 +0100, Daniel Roesen wrote: > > > On Mon, Feb 28, 2005 at 03:09:31PM +0100, Goetz Lichtwald wrote: > > > > for research purpose I am looking for some facts concerning > > > > inter-domain AS-path failures. > > > > > > What are "inter-domain AS-path failures"? Please specify. > > > > I regard an inter-domain as-path failure as a failure, where > > the BGP "hold-timer" expires (for whatever reason). Sorry for being still too imprecise. > So you mean specifically BGP sessions timing out (session flaps)? > Or do you actually mean any session shutdown (for whatever reason)? I want know -- in real life -- how often BGP regards an AS-path to be broken, i.e. no KEEPALVIE messages can be exchanged -- at least that is what BGP "thinks". This should result in an "BGP session timing out" (your first point). From rom my understanding BGP tries to reestablish the BGP session for a certain time (ConnectRetry timer) and waits for an incoming BGP session request. So, concerning your second remark I am not quite sure if I got the point. Where is the difference between them? Is there a "meta-state" between a "session flap" and a "shut down"? Anyway, for me it is important to get a feeling of how many of those session flaps occur with a duration on less than appr. 10 minutes. kind regards, - goetz -- Dipl. Inform Goetz Lichtwald University of Karlsruhe, Germany Institute of Telematics Zirkel 2, 76128 Karlsruhe Phone: +49 (0) 721 - 608 6404 Fax: +49 (0) 721 - 608 6789 PGP-Key: http://www.tm.uka.de/~lichtwald/mykey.asc -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 189 bytes Desc: This is a digitally signed message part URL: </ripe/mail/archives/routing-wg/attachments/20050228/68ab2844/attachment.sig>
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