On Tue, 10 Oct 2000, Fred Flinstone wrote:
> ok here it goes....
>
> we have a customer we manage that is incurring CRC'c, input errors etc on
> there serial interface.
new install or working install?
>
> 1. stress tested the circuit many times from the frame cloud through the csu
> as good
What type of loopbacks did you do? (different loopbacks only go thru
different parts of circuitry in a csu)
> 2. tries verious cables
> 3. there are no interface modules i believe its a 2500 something router but
> i can check
if its a 2500, and you suspect possible serial port problem you can always
try the other serial port for good measure, although hardware failure is
probably low on the list I would say.
> 4. the only times crc's cross the link (verified by a protocol analyzer) is
> when we telnet from our management platform to the site...even if i just
> enter one character in the telnet session crc's increment
Are you seeing carrier transitions on one end and interface resets on the
other?
> 5. if you telnet from a neighboring router or dial in this produces no crc's
> what so ever.
> -
> we have 3rd level engineers looking at this i bet if you find an answer I
> could get you a nice paying job...:) (well maybe)
> -
> any help would be appreiciated
Brian
> -
> thanks...kyle
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-----------------------------------------------
Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
Network Administrator
ShreveNet Inc. (ASN 11881)
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