In the recent past we've had at least 2 distinct T-1 issues with 2 separate 2811's running 12.4(13d), using WIC-1DSU-T1-V2 modules.
When our T-1 telco provider did intrusive testing on a suspect/down t-1 line, they claim to have cleared issues and the lines come up on their NIUs, but our remote 2811s show the service module in remote initiated loopback, status unkown.
It takes a clear service-module s0/0/0 to reset the loopback error and get an up/up status.
In 12.4(13d) the service-module t1 remote loopback all command defaults to enabled.
Reading the command docs there's a caveat mentioned that disabling the remote loopback function on the interface does not necessarily stop telco providers from looping up to the WIC-1DSU-T1-V2 module when framing is set to ESF, which is what we use.
We first discovered problems with the V2 WIC in the 12.4.(10b) code. We had similar issues to the loop test problems described above, except that a show service module s0/0/0 command burped an IOS traceback error bug.
After upping the IOS ver that problem cleared.
We are considering disabling the remote loopback function, but are still wary of the caveat that hints that telco initiated remote loopbacks may still be possible.
Any other experiences/thoughts are greatly appreciated.
Webcast video: Introduction to the Web of Things: What is it and why is it useful?
This event provides an overview of the Web of Things (WoT), from its definition and architecture, to its main components, scripting, and use cases sample...
The promise of a network that can detect problems on its own, lets IT management system know, debugs and isolates the problem, seeks permission to rectify it, and then actually goes out and does it, must feel like utopia! Surely, this is the stuff of the ...
Background : There is growing interest for SDWAN capability on NFVIS based virtual branch. SDWAN XE code enables SDWAN with key features that are part of IOS XE codebase, including WAN diversity option with T1/E1, LTE, etc.
This Howto document ...
I upgraded the NX -OS on Nexus 7K and after upgrade. I could not longer console in. What could be the root cause?
Check the line console config and the speed is not set to 9600 after upgrade per below
line Console: Spe...