Troubleshooting guide

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ATM and Layer 3 Switch Router Troubleshooting Guide

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Chapter 6 Troubleshooting Switch Router ATM Network Connections

Troubleshooting PNNI Addresses and Address Summarization

This section describes how to troubleshoot PNNI address and address summarization problems.

Summary addresses can be used to decrease the amount of information advertised by a PNNI node, and

thereby contribute to scaling in large networks.

This section contains the following procedures:

• Checking PNNI Address Prefix Configurations

• Debugging Summary Addresses

Checking PNNI Address Prefix Configurations

A single default summary address is configured for each logical group node in the PNNI hierarchy. The

length of that summary for any LGN equals the level of the child peer group, and its value is equal to the

first level bits of the child peer group identifier. This address prefix is advertised into the peer

group LGN.

Use the following commands to check the PNNI address prefix configuration:

Command Purpose

show atm route Confirms the list of all prefixes known by

the node.

show atm addresses Confirms that the correct prefix is present

for the active ATM Address.

show atm pnni database internal-node-number

ptse-id detail

Confirms the actual prefixes being

advertised.

show atm pnni hierarchy network detail Confirms which switch router is acting as

the ancestor LGN.

show atm route Confirms that the child PGL is up and that

the scope is appropriate to allow

advertising at the higher-level.

show atm pnni scope Confirms the configuration of the UNI

scope map.