Re: [nsp] REG: Cisco 2610 problems

From: George Robbins (grr@netaxs.com)
Date: Fri Feb 09 2001 - 14:47:46 EST


> To: lindahl@ack.Berkeley.EDU
> Cc: cisco-nsp@puck.nether.net
> Subject: Re: [nsp] REG: Cisco 2610 problems
>
> > >"Feb 9 19:35:50.577 IST: %AMDP2_FE-5-LATECOLL: Ethernet0/0 transmit error
> >
> > it indicates a late collision, which means that a collision occurred after
> > the period during which a collision should occur on a correctly functioning
> > net. it does not necessarily indicate high collisions; rather it indicates
> > that some device(s) is malfunctioning;
>
> And the important point here is that a "late collision" is a *serious*
> error, which will drastically reduce your network performance.
>
> Steinar Haug, Nethelp consulting, sthaug@nethelp.no

You bet.

Usually a half/full duplex mismatch - setting full duplex truns of the
carrier sense part of the ethernet CSMA/CD and you start blindly sprarying
packets, when they collide it's marked as a late collission and your
effecitve bandwidth is limited to a few mb/s due to missed packets and
retries.

                                                        George



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