Yealink VC400 Administrator's Manual page 278

Administrator's Guide for Yealink Video Conferencing Systems
Parameter
To capture packets via web user interface:
Click on Setting->Configuration.
1.
Enter the desired value in the Packet Capture Count field.
2.
Enter the desired value in the Packet Capture Clip Bytes field.
3.
Select the desired value from the pull-down list of Pcap Filter Type.
4.
If Custom is selected, enter the desired packet filter string in the Packet Filter String field.
Click Start to start capturing signal traffic.
5.
Reproduce the issue to get stack traces.
6.
Click Stop to stop capturing.
7.
262
Description
equivalent to "(not tcp port 3128) and
tcp port 23".
"not tcp port 3128 and tcp port 23" is
NOT equivalent to "not (tcp port 3128
and tcp port 23)".
Example: (src host 10.4.1.12 or src net
10.6.0.0/16) and tcp dst port range
200-10000 and dst net 10.0.0.0/8
Displays packets with source IP address
10.4.1.12 or source network
10.6.0.0/16, the result is then
concatenated with packets having
destination TCP port range from 200 to
10000 and destination IP network
10.0.0.0/8.
Default: Blank
Note: It only works if the parameter
"Pcap Filter Type" is set to Custom.
Configuration Method