Defining An Ip Filter - Nortel business policy switch 2000 User Manual

316 Chapter 5 Sample QoS configuration

Defining an IP filter

You create IP filters for IP packets that are to be forwarded through the BPS 2000
on specific ingress ports. In each IP packet, there is a differentiated services
(DiffServ) field in the packet header that you can mark for specific treatment. This
field is called the DiffServ code point (DSCP). The DSCP has a specific value that
determines how the packet is treated as it travels through the network. As each
packet is examined it will be forwarded or dropped, depending on whether or not
the filter criteria is matched.
You use the IP Filter Creation section of the Rules > IP Classification page when
defining your IP filters.
To define an IP filter:
1 C lick the Application > QoS > QoS Advanced > Rules > IP Classification
menu option.
The IP Classification page opens
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Note: When you choose the value Ignore, the system matches all fields
for that parameter.
(Figure 106 and Figure 107).