[c-nsp] ATM CRC errors

Alex Rubenstein alex at nac.net
Thu Oct 28 07:57:29 EDT 2004

Check for dropped cells on the ATM layer?

On Wed, 27 Oct 2004, James Hamilton wrote:

> Hi there, we've got an ATM DS3 to Qwest (our telco) for Qwest based T1s and
> DSL.  It's taken ~588 input CRC errors in the last 20 minutes.  The count for
> the last week was ~140,000 CRC's.  I've been unable to match these CRC errors
> to the counters for my interfaces.  There were about 100,000 CRC's that I
> couldn't match to any interface except the main atm1/0 interface.
> We've checked the physical line, Qwest has monitored the port.  They are
> telling me that discarded cells are the cause.  If that is the case shouldn't
> I be able to match the main interface CRC counter to the CRC counters for all
> my subinterfaces?  Any insight would be appreciated.
> Thanks
> -- 
> James Hamilton
> Southwest Cyberport
> http://www.swcp.com
> 505-232-7992
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-- Alex Rubenstein, AR97, K2AHR, alex at nac.net, latency, Al Reuben --
--    Net Access Corporation, 800-NET-ME-36, http://www.nac.net   --

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