Patton electronic 2800 user manual Defining the access control list profile, Packet classification

OnSite 2800 Series User Manual 8 • Link scheduler configuration

•Displaying link scheduling profile information (see page 110)

•Enable statistics gathering (see page 110)

ACL

Packet Profile

Classification

Predefined

Classes

Different Types (Classes) of Traffic

The service-policy profile defines the arbitration mode and order in which packets of different classes are served.

Service

Policy

Profile

Link Arbiter

This interface is used as access link and normally represents the bottleneck

of the system. IP Interface “wan”

Figure 20. Elements of link scheduler configuration

Defining the access control list profile

Packet classification

The basis for providing any QoS lies in the ability of a network device to identify and group specific packets. This identification process is called packet classification. In OnSite access control lists are used for packet classi- fication.

An access control list in OnSite consists of a series of packet descriptions like “addressed to xyz”. Those descrip- tions are called rules. For each packet the list of descriptions is sequentially checked and the first rule that matches decides what happens to the packet. As far as filtering is concerned the rule decides if the packet is dis- carded (“deny”) or passed on (“permit”). You can also add a traffic-class to the rule and if this rule is the first matching rule for a packet it is tagged with the traffic-class name.

Link scheduler configuration task list 100