3Com Swich 7750 Series
Command Reference Guide – Information Center
Chapter 1 Information Center Commands
1-5
Table 1-3
Special characters in regular expression.
Special
characters
Description
Usage restrictions
_
The underscore, functions
similar to a wildcard, can
represent the following
characters:
^ –– Caret
$ –– Dollar sign
| –– Alternation sign
[ –– Left bracket
, –– Comma
( ) –– Left/right parenthesis
{ } –– Left/right brace
] –– Right bracket
Space
Start/stop character
If the first character of a regular
expression is not ‘_’, the number of
‘_’ used in the expression is not
restricted, but is restricted by the
length of command line.
If the first character is ‘_’, the
number of consecutive “_” should
less than 5;
If the ‘_’ characters are not
consecutive, the output information
will be filtered by the first group of
‘_’, and the remain ‘_’ characters
will not be processed.
(
The left parenthesis, the
push-onto-the-stack flag in
programming
You are recommended not to use
this character to establish a regular
expression.
Description
Use the
isplay logbuffer
command to display the state of logbuffer and the
information recorded in logbuffer.
Example
# Display the state of logbuffer and the log information recorded in the logbuffer.
<3Com> display logbuffer
Logging buffer configuration and contents:enabled
Allowed max buffer size : 1024
Actual buffer size : 512
Channel number : 4 , Channel name : logbuffer
Dropped messages : 0
Overwritten messages : 0
Current messages : 91
...... (Omitted)
