Configuring Syslog
Syslog is the most common way to archive router events for security monitoring.
A router acts as a syslog client that sends messages to a syslog server.
Syslog severities range from 0 (critical) to 7 (debugging). Example 5-8
demonstrates how to configure syslog.
Example 5-8 Configuring Syslog
R1(config)#logging 10.1.2.1
R1(config)#logging trap informational
R1(config)#logging source-interface loopback 0
R1(config)#logging on