3Com 4510G Configuration Manual page 1023

Eight levels of system information
The information is classified into eight levels by severity. The severity levels in the descending order
are emergency, alert, critical, error, warning, notice, informational and debug. When the system
information is output by level, the information with severity level higher than or equal to the specified
level is output. For example, in the output rule, if you configure to output information with severity level
being informational, the information with severity level being emergency through informational is all
allowed to be output.
Table 21-1 Severity description
Severity
Emergency
Alert
Critical
Error
Warning
Notice
Informational
Debug
Six output destinations and ten channels of system information
The system supports six information output destinations, including the console, monitor terminal
(monitor), log buffer, log host, trap buffer and SNMP module. The specific destinations supported vary
with devices.
The system supports ten channels. The six channels 0 through 5 are configured with channel names,
output rules, and are associated with output destinations by default. The channel names, output rules
and the associations between the channels and output destinations can be changed through
commands. Besides, you can configure channels 6, 7, 8, and 9 without changing the default
configuration of the six channels.
Table 21-2 Information channels and output destinations
Information channel
number
0
1
2
3
Severity value
0
1
2
3
4
5
6
7
Default channel name
console
monitor
loghost
trapbuffer
21-2
Description
The system is unusable.
Action must be taken immediately
Critical conditions
Error conditions
Warning conditions
Normal but significant condition
Informational messages
Debug-level messages
Default output destination
Console (Receives log, trap and debugging
information)
Monitor terminal (Receives log, trap and
debugging information, facilitating remote
maintenance)
Log host (Receives log, trap and debugging
information and information will be stored in files
for future retrieval.)
Trap buffer (Receives trap information, a buffer
inside the router for recording information.)