PA-T3 Loopback Issues

[oatinetworksupport]

I have a 7206VXR/NPE400 with a PA-T3 module in it.

I'm trying to put a loopback up towards the service provider so that they can do head-to-head testing. In interface configuration mode, I issue a 'loopback network line' command, but the provider tells me they never see the loop. I have also tried 'loopback network payload', with no luck.

Anyone have a clue why this is? I have done ' loopback local' and it works fine, I've tested to the loop.

[patrickvanham]

Is the encapsulation on the serial set to HDLC? If so, the provider should see the loop. If they do not it could point to an issue on the T3 itself.

[oatinetworksupport]

Yes, the encapsulation is set to HDLC. The T3 works fine most of the time, but we get lots of errors in spurts every 10-12 hours.

Here's the interface config:

interface Serial3/0

ip address [removed]

ip route-cache flow

dsu bandwidth 44210

framing c-bit

cablelength 10

serial restart-delay 0

end

[csco10716389]

How can u get loop over the Logical interface

[oatinetworksupport]

http://www.cisco.com/en/US/docs/ios/11_2/feature/guide/pat3.html#wp3810