Patton electronic SmartNode 4110 Series Enable statistics gathering see, Packet classification

SmartWare Software Configuration Guide 13 • Link scheduler configuration

•Enable statistics gathering (see page 168)

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 24. 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 SmartWare access control lists are used for packet classification.

An access control list in SmartWare consists of a series of packet descriptions like “addressed to xyz”. Those descriptions 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 discarded (“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.

Some types of packets you do not have to tag with ACL. Voice and data packets from of for the SmartNode itself are automatically tagged with predefined traffic-class names: Predefined internal classes for voice and other data are:

•local-voice—VoIP packets that originate from the SmartNode itself.

Link scheduler configuration task list 157