nanog mailing list archives
Re: Cogent latency / congestion
From: "Kevin Oberman" <oberman () es net>
Date: Mon, 20 Aug 2007 14:13:38 -0700
Date: Mon, 20 Aug 2007 16:11:44 -0400 From: Mike Tancsa <mike () sentex net> Sender: owner-nanog () merit edu At 03:54 PM 8/20/2007, Dan Armstrong wrote:We're going crazy up here, I'm trying to nail down where exactly the problem is - We don't use Cogent anywhere, but we're having terrible problems with Bell and many sites in Europe...Bell uses Cogent in a large way. The second traceroute was from an IP in their AS (577) out. I am prepending out Cogent, but Bell does everything it can not to use Teleglobe so I am having problems influencing their routes to come back that way. They also have a very odd path out of Chicago. This is from a site in Toronto (source IP in AS577) back to me peering with Cogent's router in Toronto... Toronto, Chicago, Kansas, Texas, Washington, Boston, Albany, Toronto. Thats quite the milk run. Usually its Toronto, Chicago, Toronto.
Almost certainly the fiber cut of last night. Still down after >19 hours. Not a pretty picture for those lacking diversity between Chicago and points east. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman () es net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751
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Current thread:
- Cogent latency / congestion Mike Tancsa (Aug 20)
- Re: Cogent latency / congestion Marshall Eubanks (Aug 20)
- Re: Cogent latency / congestion David Ulevitch (Aug 20)
- Re: Cogent latency / congestion Kevin Oberman (Aug 20)
- Re: Cogent latency / congestion Dan Armstrong (Aug 20)
- Re: Cogent latency / congestion Mike Tancsa (Aug 20)
- Re: Cogent latency / congestion Kevin Oberman (Aug 20)
- Re: Cogent latency / congestion Steve Gibbard (Aug 20)
- Re: Cogent latency / congestion Mike Tancsa (Aug 20)
- Re: Cogent latency / congestion Mike Tancsa (Aug 20)
- Re: Cogent latency / congestion Eric Spaeth (Aug 20)
- RE: Cogent latency / congestion Rod Beck (Aug 20)
- Re: Cogent latency / congestion Kevin Oberman (Aug 20)
- Re: Cogent latency / congestion Deepak Jain (Aug 20)
- Re: Cogent latency / congestion Kevin Oberman (Aug 20)
- Re: Cogent latency / congestion Eric Spaeth (Aug 20)
- RE: Cogent latency / congestion Rod Beck (Aug 20)
- Re: Cogent latency / congestion Justin M. Streiner (Aug 20)