Avaya Media Gateway G250, Руководство администратора

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Configuring and analyzing packet sniffing
Issue 5 June 2008 457
Configuring packet sniffing settings
The packet sniffing service provides several administrative settings you can use to control the
capture functionality. Use the following commands to configure packet sniffing settings. These
commands are all used from general context, and require read/write access.
●
Use the
capture buffer-mode
command to specify the type of buffer to use. The
available parameters are:
-
cyclic
. Circular buffer that overwrites the oldest records when it is filled up. Use a
cyclic buffer to store the most recent history of packet activity.
-
non-cyclic
. Linear buffer that is used until it is filled up
For example:
●
Use the
capture buffer-size
command to specify the maximum size of the capture
buffer. Available values are 56 to
10000
kb. The default value is
1000
. To activate the
change in buffer size, you must enter
copy running-config startup-config
, and
reboot the G250/G350. For example:
●
Use the
capture max-frame-size
command to specify the maximum number of bytes
captured for each packet. This is useful, since in most cases, the packet headers contain
the relevant information. Available values are
14
to
4096
. The default value is
128
. For
example:
Note:
Note:
When you change the maximum frame size, the G250/G350 clears the capture
buffer.
●
Enter
clear capture-buffer
to clear the capture buffer.
G350-001(super)# capture buffer-mode cyclic
Done!
G350-001(super)#
G350-001(super)# capture buffer-size 2000
To change capture buffer size, copy the running
configuration to the start-up configuration file, and reset the device.
G350-001(super)# copy running-config startup-config
Beginning copy operation .................... Done!
G350-001(super)#
G350-001(super)# capture max-frame-size 4000
This command will clear the capture buffer
- do you want to continue (Y/N)? y
Done!
G350-001(super)#