Chapter 8: System logging
System logging
System logging is a method of collecting system messages generated by system events. The
Branch Gateway includes a logging package that collects system messages in several output
types. Each of these types is called a sink. When the system generates a logging message,
the message can be sent to each sink that you have enabled.
System messages do not always indicate problems. Some messages are informational, while
others may help to diagnose problems with communications lines, internal hardware, and
system software.
By default, all sinks are disabled. When enabled, log file and Syslog sink settings can be saved
by entering copy running-config startup-config to save the running configuration
to the startup configuration. However, the Session sink and its settings are deleted when the
session is terminated.
You can define filters for each sink to limit the types of messages the sink receives (see
Logging
filter configuration on page 224).
The logging facility logs configuration commands entered through the CLI or through SNMP,
as well as system traps and informative messages concerning the behavior of various
processes. However, a user enabling the log will only see entered commands with a user-level
no higher than the user’s privileges. For example, a user with read-only privileges will not see
entered commands having a read-write user level. In addition, the log does not display entered
information of a confidential nature, such as, passwords and VPN pre-shared-keys.
Related topics:
Types of logging sinks on page 216
Syslog server configuration on page 216
Configuring a log file on page 220
Configuring a session log on page 223
Logging filter configuration on page 224
Accessing diagnostic logs on page 229
Summary of logging configuration CLI commands on page 230
Administering Avaya G430 Branch Gateway October 2013 215
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