How To Configure System Message Logs - Cisco Catalyst 2960 series Configuration Manual

How to Configure System Message Logs

Messages are stored in the history table because SNMP traps are not guaranteed to reach their destination. By
default, one message of the level warning and numerically lower levels are stored in the history table even
if syslog traps are not enabled.
When the history table is full (it contains the maximum number of message entries specified with the logging
history size global configuration command), the oldest message entry is deleted from the table to allow the
new message entry to be stored.
The history table lists the level keywords and severity level. For SNMP usage, the severity level values increase
by 1. For example, emergencies equal 1, not 0, and critical equals 3, not 2.
How to Configure System Message Logs
Setting the Message Display Destination Device
If message logging is enabled, you can send messages to specific locations in addition to the console.
This task is optional.
SUMMARY STEPS
1. configure terminal
2. logging buffered [size]
3. logging host
4. logging file flash: filename [max-file-size [min-file-size]] [severity-level-number | type]
5. end
6. terminal monitor
DETAILED STEPS
Command or Action
Step 1
configure terminal
Example:
Switch# configure terminal
Step 2 logging buffered [size]
Example:
Switch(config)# logging buffered
8192
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
1600
Purpose
Enters global configuration mode.
Logs messages to an internal buffer on the switch or on a standalone switch or,
in the case of a switch stack, on the active switchstack master. The range is 4096
to 2147483647 bytes. The default buffer size is 4096 bytes.
If a standalone switch or the active switchstack master fails, the log file is lost
unless you previously saved it to flash memory. See Step 4.
Do not make the buffer size too large because the switch could run out
Note
of memory for other tasks. Use the show memory privileged EXEC
command to view the free processor memory on the switch. However,
this value is the maximum available, and the buffer size should not be
set to this amount.