[c-nsp] 2651xm packet loss with 200 ft ethernet link

Jon Lewis jlewis at lewis.org
Sat Dec 29 21:44:11 EST 2012


On Fri, 28 Dec 2012, Andy Dills wrote:

> However, we were seeing tremendous packet loss. After determining the
> errors were coming from this end, and testing and replacing everything in
> the path, we finally tried moving the router into the telco handoff room
> so we could try to eliminate a lot of variables. With a short patch cable,
> it worked fine, no packet loss.
>
> So, we made a 200 ft cable to simulate the issue, and hooked it up to the
> router while it sat next to the Level3 handoff...major packet loss again.
> We tried the other fastethernet interface on the 2651...same problem.
>
> However, if I take that same cable and terminate it into one of our 7200s,
> we get zero packet loss.

You mentioned errors, but didn't say what type.  Were you actually getting 
errors (crc/frame/collisions/etc.) or just packets vanishing on the wire?

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  Jon Lewis, MCP :)           |  I route
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