T1 Clocking -- Help!

[Adam Frederick]

Good Afternoon;

I currently have a line that is flapping and of course the telco said his multipattern test ran clean. We just rolled out new 2821s with VWIC-2MFT1 cards to all locations. Every link is a leased line, we don't have any Frame, etc so its all purely point-to-point T1s. One side of each peer is set to clock source line and the other side is set to clock source internal. Is this not correct?

[thisisshanky]

That setting should work just fine. Are you using both ports on the T1 card ?

can you paste a sh controllers t1 x/y output ? (x/y is to be understood as appropriate interface number)

[Adam Frederick]

I have attached the show contr for all 3 routers in the path. The affected T1 is the one between Branch 1 and Branch 2. I've noticed with high volumes of traffic the line will drop as well. I've included running configs as well.

Thank you for your help!

[thisisshanky]

Adam,

On these routers,

try a "network-clock-participate wic 0 " (where 0 should be wic slot number where the vwic is located)

http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_command_reference_chapter09186a00800b350b.html#wp1001437

Also try

http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_command_reference_chapter09186a00800b350b.html#wp1001233

[Adam Frederick]

2 Questions;

1.)Should I do this on all of my routers?

2.)In some routers I'm using 4 T1s, so should I config both network-clock-participate wic 0 & 1, or just 1 of the WIC slots?

Thanks again for your help, you've been very helpful!

[thisisshanky]

Configure on the HQ first and set the network-clock participate only on the wics that you are seeing this problem.

[Adam Frederick]

Last config attached