This section covers general network-management issues such as the following:
Configuring SNMP on devices
Capturing SNMP and Telnet output through scripting
Aside from traps, Cisco devices provide useful device state information by using the UNIX syslog facility. Whereas SNMP traps are well-defined and tend to reflect stateful changes, logging messages from Cisco devices are free-form text with well-defined names that reflect a wide range of conditions. The types of messages can range from debugging information such as when you enable debugging, to so-called “emergency” level messages, which reflect a catastrophic event such as a failing interface.