Huawei eSpace 6805 Administrator's Manual page 99

Huawei IP Phone eSpace
6805&6810&6830&6850&6870
Administrator Guide
Figure 5-33 Setting packet capture options
Packet Analysis
1.
Issue 01 (2011-12-21)
Sometimes you need to capture packets cyclically or capture packets with the fixed size
(for example, capture packets of 10 M, and then stop capturing packets), or capture
packets with a fixed interval (stop capturing packets after capturing packets for 10
minutes). You can set related options in capture File(s).
Before capturing packets, you can filter packets. The expression used to filter packets is
host<IP address>.Only the packets with the specified IP address are captured. Common
expressions used to filter packets are as follows:
[src|dst] host <host>
ether [src|dst] host <ehost>
gateway host <host>
[src|dst] net <net>[{mask <mask>}|{len <len>}]
[tcp|udp] [src|dst] port <port>
less|greater <length>
ip|ether proto <protocol>
ether|ip broadcast|multicast
<expr>relop<expr>
Packet Filtering
In actual applications, there is a large amount of data in packet capture. To rapidly locate
the required packets, you need to use the packet filtering function.
To filter packets, enter the expression in the Filter text box and click Apply. For
example, to filter TCP packets, enter tcp in the Filter text box and click Apply.
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