nanog mailing list archives
Re: mae-west congestion
From: "Kevin Oberman" <oberman () nersc gov>
Date: Thu, 21 Mar 96 15:24:17 -0800
Date: Thu, 21 Mar 1996 13:48:40 -0800 (PST) From: matthew () scruz net (Matthew Kaufman) If you take a look at http://ext2.mfsdatanet.com/MAE/west.ames.overlay.html you find that the Ames FDDI ring is totally saturated. Now, that means that anyone who's trading traffic over on that side, or between Ames and San Jose, is getting really really lousy performance. What I don't understand is why that has _stayed_ saturated... it seems to me that some of the big players would have rerouted their traffic by now to avoid subjecting it to this, which would also have the side effect of causing the problem to, at least for the short term, go away.
We, too, have notices the problem, although we mostly see it in packets bound for the MFD ring. Pings to other Ames peers seem to do fine. This started abruptly on about March 7th and has been consistently bad since then. That is about the time BBN Planet started routing everything there via AS1, but I have no idea of this is a significant part of the problem. FWIW, MFS blames the load on the GIGAswitch, although I don't see this indicated in the plots. They didn't give us any estimate for improving the situation. R. Kevin Oberman Energy Sciences Network (ESnet) National Energy Research Supercomputer Center (NERSC) EMAIL: oberman () es net Phone: +1 510 422-6955
Current thread:
- mae-west congestion Matthew Kaufman (Mar 21)
- Re: mae-west congestion Kevin Oberman (Mar 21)
- Re: mae-west congestion Stephen Stuart (Mar 21)
- Re: mae-west congestion Mark Boolootian (Mar 21)
- Re: mae-west congestion Jonathan Heiliger (Mar 21)
- Re: mae-west congestion Peter Kaminski (Mar 21)
- Re: mae-west congestion Nikos Mouat (Mar 22)
- <Possible follow-ups>
- Re: mae-west congestion Lance Tatman (Mar 22)
- Re: mae-west congestion Kevin Oberman (Mar 21)