[c-nsp] P to P T1 timing issue?

[luiz.maia at light.com.br]

There is a parameter in the controller that you should verify: CRC4 or 
NOCRC.
A good troubleshoothing source is: 
http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00800a758d.shtml

LUIZ PAULO MAIA
Gerência de Redes e Telecomun / ATOS ORIGIN SERVIÇOS DE TECNOLOGIAINFORM
LIGHT S.E.S.A. / luiz.maia at light.com.br / 8119-5683

Evite o desperdício. Antes de imprimir, pense em nosso compromisso com o 
desenvolvimento sustentável.



"Kienzle, John" <John.Kienzle at anadarko.com>
Enviado Por: cisco-nsp-bounces at puck.nether.net
03/07/2007 19:03

 
               Para:"Justin M. Streiner" <streiner at cluebyfour.org>, 
<cisco-nsp at puck.nether.net>
                  cc:(bcc: luiz paulo maia ATOS ORIGIN/LIGHT)
                cco:luiz paulo maia ATOS ORIGIN/LIGHT
         Assunto:Re: [c-nsp] P to P T1 timing issue?


 
It is a vwic 2mft t1-d1 card in a 3845 series router. CRC errors,
aborted packets and carrier transitions. The interface appears to stay
up, so does the controller port. 

Update - TAC is thinking we have a bad card after further review.

John Kienzle
Senior ITS Analyst


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Justin M.
Streiner
Sent: Tuesday, July 03, 2007 3:32 PM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] P to P T1 timing issue?

On Tue, 3 Jul 2007, Kienzle, John wrote:

> We are configuring our routers for a point to point T1 circuit.  We 
> are using a similar config as we have had in the past with T1's. The 
> problem we seem to be having is the connection goes up and down 
> continuously. In fact, it will be up for 20 seconds, down for 10 
> seconds, and then repeats. It seems like some kind of timing issue, 
> and after verifying no clocking from the Telco, we configured clocking

> on one router. That did not fix it. I believe our lead tech opened a 
> TAC case for assistance, just wanted to get your thoughts too, before 
> we schedule downtime to change out and try a different controller
card.

What kinds of errors are you seeing, both on the interface and on the
controller port?  Since you mentioned a T1 controller card, I'm assuming
you're using a 7200 or some other PA-based router?

jms
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