Sonet alarm problem on Cisco GSR

[pterwal]

Hi,

I'm Peter working in an ISP network operations. I have problems understanding this alarm in Cisco GSR. July 15 04:44:55 EDT: %SONET-4-ALARM: POS5/0/0: B3 BER exceeds threshold, TC alarm declared. How do I troubleshoot this problem? The interface is up but the line protocol went down because of it. What we did was we requested a loop from our international peering facing our side and we were able to see the loop. After releasing the loop and normalizing the line, line protocol went up and traffic started to flow. What's the first thing to do in problems like this?

[balajitvk]

Hi pter,

When the number of BIP errors crosses a threshold that you can configure, the router reports log messages similar to this. But there is link descrbing how to configure threshold and what to do when u find this problem, just go thro. this,

http://www.cisco.com/en/US/partner/tech/tk482/tk607/technologies_tech_note09186a0080094a79.shtml

Hope this will clarify ur doubt,

Rate if it does,

Rgs

[fcmartinez]

Friend:

take a look to this:

http://www.cisco.com/en/US/tech/tk482/tk607/technologies_tech_note09186a0080094a79.shtml

http://www.cisco.com/en/US/tech/tk39/tk48/technologies_tech_note09186a00800c93c4.shtml

http://www.cisco.com/en/US/tech/tk482/tk607/technologies_tech_note09186a0080094522.shtml

I am actually getting same errors, i am triying to figure out what is going on, it looks like we are having problems with providor...