KVH Industries FB250, User Manual

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Chapter 4: Using the web interface
Administration 177
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Using traffic flow filters
Purpose of the traffic flow filters
The purpose of the traffic flow filters is to assign different priorities to different
types of traffic in order to optimize performance.
Example: When you are browsing the Internet a Standard IP connection is
normally sufficient. However, to have a video conference you may
need a Streaming IP connection in order to obtain a direct
connection without interruptions. Your traffic flow filters can define
these priorities, so that your connection is automatically set to
Streaming e.g. when you have a video conference.
What are traffic flow filters?
When more than one type of traffic is needed, you must use both a primary
and one or more secondary profiles. For the BGAN core network and the
terminal to classify packets received from the external network into the proper
profile, you need a traffic flow filter.
A list of traffic flow filters consists of one to eight packet filters. Each packet
filter has an evaluation precedence index that is unique within all traffic flow
filters associated with the profiles that share the same PDP (Packet Data
Protocol) address. The evaluation precedence index determines the order in
which the filters are applied; 0 is applied first, then 1 and so forth. Information
of source, destination, type of service etc. is combined in each packet filter in
the list.