Problem with cisco 1721 and T1 in Frame relay

Unanswered Question
Mar 3rd, 2010

    Hello guys I have a cisco 1721 router configured with a frame relay for a T1 service, the problem is sometimes de upload speed of my T1 drops to almost 10kb. and stays like that, the hwic serial interface gets hot. the ping for the router from the WAN is ok, My ISP says fromtheir side everything is ok.

     what do you think it could be... could it be the serial interface or the fast ethernet interface??.

   Hope you guys could help.

I have this problem too.
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Tharak Abraham Wed, 03/03/2010 - 21:46


Can you check for error/drops in the interface ?

sh int sx/y and post it ?

Cut down all links downstream and make sure your WAN link is error free.(this can be painful but only way isolating the problem)

And are you trying to squeeze in a 100Mbps user trafffic over a T1 ?

The famous "Global Sync" issues..?


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