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Corinex AV200 Powerline Ethernet Adapter
3.4.12 Configuring Video Applications
In the case of a network where real-time traffic must coexist with massive data
transfers, the service classifier must be used to prioritize the bandwidth-sensitive
traffic above the other types of traffic.
As an example, consider the network shown below.
The node connected to the ADSL modem is the access point. Data and video are
delivered through ADSL. The access point has to prioritize UDP video over data to
avoid a jittery image when there is a heavy data download.
First of all, the
Criterion field must be set to Custom, in order to create one’s own
rules to classify the traffic.
To prioritize UDP traffic, first the Ethernet packets containing IP packets have to be
detected. This requires detecting the pattern 0x0800 at offset 16. Because the field
to inspect is two bytes, the bitmask must also cover the same space. Therefore,
0xFFFF is used as bitmask. These values are introduced in the fields Custom Crite
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rion Offset, Custom Criterion Pattern and Custom Criterion Bitmask.