Huawei eSpace 6805 Administrator's Manual page 110

Huawei IP Phone eSpace
6805&6810&6830&6850&6870
Administrator Guide
Figure 5-52 Suspicious packets displayed on the Expert Infos
Filter Expression Construction Tips
To use the application filter to construct a filter expression, proceed as follows:
1.
2.
Issue 01 (2012-06-20)
The Ethernet allows a maximum data frame length of 1,500 bytes and the IEEE 802.3 allows a
maximum data frame length of 1492 bytes. Maximum data frame length at the link layer is called a Max
Transfer Unit (MTU). Most networks have an MTU. If a packet sent from the IP layer is greater in size
than the MTU at the link layer, the packet must be divided into fragments whose sizes are smaller than
the MTU.
Expand the message parsing contents.
Right-click a field in packet list pane or packet details pane, and then choose Apply as
Filter > Selected.
The field is set as a filter criterion and displayed in the Filter text box, and the
corresponding data packets are displayed based on this expression, as shown in
5-53.
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5 Appendix
Figure
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