Nortel business policy switch 2000, User Manual

Page: 316 / 412

316 Chapter 5 Sample QoS configuration
208700-C
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 Click the Application > QoS > QoS Advanced > Rules > IP Classification
menu option.
The IP Classification page opens ( Figure 106 and Figure 107 ).
Note: When you choose the value Ignore, the system matches all fields
for that parameter.