North American Network Operators Group

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Re: fractional gigabit ethernet links?

  • From: Marshall Eubanks
  • Date: Mon Jul 15 23:56:31 2002

On Mon, 15 Jul 2002 22:48:12 -0400 (Eastern Daylight Time)
 Alex Rubenstein <[email protected]> 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, [email protected], latency, Al Reuben --
> --    Net Access Corporation, 800-NET-ME-36, http://www.nac.net   --
> 
>