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