3Com Switch 7754, Configuration Manual

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75
I
NFORMATION
C
ENTER
Information Center
Overview
Information center is an indispensable part of Ethernet switches and exists as an
information hub of system software modules. The information center manages
most information outputs; it sorts information carefully, and hence can screen
information in an efficient way. Combined with the debugging program
(
debugging commands), it provides powerful support for network administrators
and developers in network operation monitoring and fault diagnosis.
Information items output by Switch 7750s are presented in the following format:
<priority>timestamp sysname module/level/digest:content
Here, angle brackets “<>”, spaces, slashes “/” and colon are the fixed format of
information.
Below is an example of log output to a log host:
<188>Apr 9 17:28:50:524 2004 3Com IFNET/5/UPDOWN:Line protocol on t
he interface M-Ethernet0/0/0 is UP (SIP=10.5.1.5 ,SP=1080)
The following describes the fields of an information item:
1 Priority
The calculation formula for priority is priority = facility
×
8 + severity - 1. in which
■
facility (the device name) defaults to local7 with the value being 23 (the value
of local6 is 22, that of local5 is 21, and so on).
■
severity (the information level) ranges from 1 to 8. Table 645 details the value
and meaning associated with each severity.
Note that no character is permitted between the priority and time stamp. The
priority takes effect only when the information is sent to the log host.
2 Time stamp
The time stamp sent to the log host is in the format of Mmm dd hh:mm:ss yyyy,
where:
Mmm” represents the month, and the available values are: Jan, Feb, Mar, Apr,
May, Jun, Jul, Aug, Sep, Oct, Nov and Dec.
dd” is the date, which shall follow a space if less than 10, for example, “7”.