Troubleshooting guide

6-41

ATM and Layer 3 Switch Router Troubleshooting Guide

OL-1969-01

Chapter 6 Troubleshooting Switch Router ATM Network Connections

Troubleshooting the PNNI Lowest-level Interface

Note Changes that are within the significant change boundaries do not trigger updates to the hello

metrics or horizontal link PTSEs.

Step 6 Check the allocated bit rates (which affect ACR) by using the show atm interface resource atm

card/subcard/port command.

Step 7 Check the CLR0 and CLR01 (CLR for CLP=0 and for CLP=0+1) configuration. Use the show

controllers atm card/subcard/port command to see detailed error information for a specific interface.

Debugging PNNI Hello State at the Lowest-level

Use the debug atm pnni hello-packet atm card/subcard/port command at both the local end and (if

possible) the remote end of the interface to see the actual hello messages being transmitted with some

additional error condition messages.

Follow these steps for further PNNI hello debugging at the lowest interface level:

Step 1 Use the debug atm pnni hello-packet atm command at the local end of the interface to see the actual

hello messages being transmitted with some additional error condition messages.

Switch1# debug atm pnni hello-packet atm 0/0/1

Step 2 Use the debug atm pnni hello-packet atm card/subcard/port command at the neighbor node of the

interface (if possible) to see the actual hello messages being transmitted.

Step 3 After the display prints out two screens full of information, turn off further printouts by using the

no debug all command.

Step 4 Scroll back up the screen display and confirm the following:

If no printouts are shown, be sure debugging is on. Confirm that this is an NNI interface and recheck the

interface debugging steps in the “Checking the PNNI Lowest-Level Interface” section on page 6-36, the

“Checking the PNNI and Signaling Control Channels” section on page 6-37, and the “Checking PNNI

PVC Status on Lowest-level Interfaces” section on page 6-38.

Command Purpose

debug atm pnni hello-packet atm

card/subcard/port

Confirms the actual hello messages being

transmitted.

no debug all Turns off all debugging.