[50025] in North American Network Operators' Group
Re: fractional gigabit ethernet links?
daemon@ATHENA.MIT.EDU (Marshall Eubanks)
Mon Jul 15 23:55:03 2002
From: "Marshall Eubanks" <tme@multicasttech.com>
To: Alex Rubenstein <alex@nac.net>, nanog@merit.edu
Date: Mon, 15 Jul 2002 23:52:30 -0400
In-Reply-To: <Pine.WNT.4.43.0207152242390.3112-100000@NEON.hq.nac.net>
Errors-To: owner-nanog-outgoing@merit.edu
On Mon, 15 Jul 2002 22:48:12 -0400 (Eastern Daylight Time)
Alex Rubenstein <alex@nac.net> wrote:
>
>
> Hello,
>
> I'm trying to troubleshoot a problem with a fractional (311 mbit/second)
> gigabit-ethernet line provided to me by a metro access provider.
> Specifically, it is riding a gig-e port of a 15454.
>
> The behavior we are seeing is an occasional loss of packets, adding up to
> a few percent. When doing a cisco-type ping across the link, we were
> seeing a consistent 3 to 4 percent loss.
>
Over what averaging time ? Could this be an example of the
"65 second problem", where the router stops dead for one or two seconds
out of every 65 seconds ?
Regards
Marshall Eubanks
> For fun, the provider brought it up to 622 mbit/second, and loss dropped
> considerably, but still hangs at about 1 to 2 percent.
>
> There is no question in my mind the issue is with the line, as we've done
> a wide variety of tests to rule out the local equipment (MSFC2s, FYI).
>
> Any clues would be exceptional.
>
>
>
> -- Alex Rubenstein, AR97, K2AHR, alex@nac.net, latency, Al Reuben --
> -- Net Access Corporation, 800-NET-ME-36, http://www.nac.net --
>
>
