Cisco Cisco 4-Port OC-3c STM-1c ATM Shared Port Adapter Technisches Handbuch

This document describes basic understanding and troubleshooting of Channelized Serial
Interfaces on SPA-1XCHSTM1/OC3.

There are no specific requirements for this document.

This document is not restricted to specific software and hardware versions.

The information in this document was created from the devices in a specific lab environment. All of
the devices used in this document started with a cleared (default) configuration. If your network is
live, make sure that you understand the potential impact of any command.

Issue "show ip interface brief' on the router to check status of serial interface in question. If
interface status is "down/down", it means issues is at layer 1 but if interface status is
"up/down" then issue is at Layer 2. If issue is at layer 2 then first step is to make sure both
sides are configured with the same encapsulation.

1.

Find out the corresponding Administrative Unit (AU) and Tributary Unit Group (TUG) under
the respective Synchronous Optical NETwork (SONET) Controller for the interface in
question.

2.