nanog mailing list archives
Re: seeing the trees in the forest of confusion
From: "Alex.Bligh" <amb () xara net>
Date: Sat, 26 Apr 1997 16:06:00 +0100
I suppose it is more fun to criticize policy and NSPs, but it may well be a hole in the BGP protocol, or more likely implementations in vendor's code [or user's implementation of twiddleable holddown timers].
My (possibly misinformed) understanding was that certain NSPs running Cisco backbones had holddown timers configured to delay withdrawls. Even after 7007 was disconnected, there were 7007 routes still being advertised well over an hour later. I do not believe these NSPs are going to have timers configured for >1hr. We've seen a problem before where a transit provider (Cisco based) was causing us problems, and we decided to turn them off. They were still advertising our routes an hour later. (Provider unconnected with any in this case). Pulling the session back up and clearing it did not help things. I'd therefore suggest that your analysis is correct. >80% of the downtime is due either to a protocol bug or a s/w bug somewhere, not NOC failure. Alex Bligh Xara Networks - - - - - - - - - - - - - - - - -
Current thread:
- seeing the trees in the forest of confusion Alan Hannan (Apr 26)
- Re: seeing the trees in the forest of confusion Alex.Bligh (Apr 26)
- Re: seeing the trees in the forest of confusion Doug Junkins (Apr 26)
- Re: seeing the trees in the forest of confusion Avi Freedman (Apr 26)
- Re: seeing the trees in the forest of confusion Larry Rosenman (Apr 26)
- Re: seeing the trees in the forest of confusion John Hawkinson (Apr 26)
- Re: seeing the trees in the forest of confusion Randy Bush (Apr 26)
- Re: seeing the trees in the forest of confusion Doug Junkins (Apr 26)
- Re: seeing the trees in the forest of confusion Tony Li (Apr 26)
- Re: seeing the trees in the forest of confusion Doug Junkins (Apr 26)
- Re: seeing the trees in the forest of confusion Tony Li (Apr 26)
- Re: seeing the trees in the forest of confusion Alex.Bligh (Apr 26)
- <Possible follow-ups>
- Re: seeing the trees in the forest of confusion Russ Haynal (Apr 26)
- Re: seeing the trees in the forest of confusion Sean Donelan (Apr 26)