Chapter 12. Using the Event Logging System (ELS)

This chapter describes the Event Logging System (ELS). The ELS continually logs all events, ®ltering them according to parameters that you select. A combination of operational counters and the ELS provides information for monitoring the health and activity of the system. The information is divided into the following sections:

vªWhat is ELS?º

vªEntering and Exiting the ELS Con®guration Environmentº on page 148

vªEvent Logging Conceptsº on page 148

vªUsing ELSº on page 151

vªUsing ELS to Troubleshoot a Problemº on page 153

vªUsing and Con®guring ELS Remote Loggingº on page 155

vªUsing ELS Message Bufferingº on page 163

What is ELS?

ELS is a monitoring system and an integral part of the router operating system. ELS manages the messages logged as a result of router activity. Use ELS commands to set up a con®guration that sorts out only those messages you feel are important.

You can then display the messages on the console terminal screen, log them to a remote workstation, or send the messages to a network management station using Simple Network Management Protocol (SNMP) traps.

The ELS system and the operational counters are the best troubleshooting tools you have to isolate problems in the router. A quick scan of the event messages will tell you whether the router has a problem and where to start looking for it.

In the ELS con®guration environment, the commands are used to establish a default con®guration. This default con®guration does not take effect until the router reinitializes.

Occasionally, it is helpful to temporarily view messages using parameters other than was set up in the ELS con®guration environment, without having to reinitialize the router. The ELS operating and monitoring environment is used to:

vTemporarily change the default ELS display settings

±Changes made in the ELS console environment take effect immediately

±Changes made in the operating/monitoring environment are not stored in nonvolatile con®guration storage.

vView statistical information regarding ELS uses of dynamic RAM

Note: Speci®c ELS messages are described in theIBM Nways Event Logging

System Messages Guide.

ELS is a subprocess that you access from the OPCON process.

© Copyright IBM Corp. 1994, 1998

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IBM SC30-3681-08 manual Using the Event Logging System ELS, What is ELS?, 147, System Messages Guide