Kontron AT8902M CLI Bedienungsanleitung PDF herunterladen (Seite 175)

AT8902M Quality of Service (QoS) Commands

Page 4 - 7 AT8902M CLI Reference Manual

You configure DiffServ in several stages by specifying three DiffServ components:

1. Class

- Creating and deleting classes.

- Defining match criteria for a class.

2. Policy

- Creating and deleting policies

- Associating classes with a policy

- Defining policy statements for a policy/class combination

3. Service

- Adding and removing a policy to/from an inbound interface

The DiffServ class defines the packet filtering criteria. The attributes of a DiffServ

policy define the way the switch processes packets. You can define policy attributes on

a per-class instance basis. The switch applies these attributes when a match occurs.

Packet processing begins when the switch tests the match criteria for a packet. The

switch applies a policy to a packet when it finds a class match within that policy.

The following rules apply when you create a DiffServ class:

• Each class can contain a maximum of one referenced (nested) class

• Class definitions do not support hierarchical service policies

A given class definition can contain a maximum of one reference to another class. You

can combine the reference with other match criteria. The referenced class is truly a

reference and not a copy since additions to a referenced class affect all classes that

reference it. Changes to any class definition currently referenced by any other class

must result in valid class definitions for all derived classes, otherwise the switch rejects

the change. You can remove a class reference from a class definition.

The only way to remove an individual match criterion from an existing class definition

is to delete the class and re-create it.

NOTE: The mark possibilities for policing include CoS, IP DSCP, and IP Pre-

cedence. While the latter two are only meaningful for IP packet types,

CoS marking is allowed for both IP and non-IP packets, since it

updates the 802.1p user priority field contained in the VLAN tag of the

layer 2 packet header.

NOTE: Traffic to be processed by the DiffServ feature requires an IP header.

4.2.1 diffserv

This command sets the DiffServ operational mode to active. While disabled, the

DiffServ configuration is retained and can be changed, but it is not activated. When

enabled, Diffserv services are activated.

Format

diffserv

Mode Global Config

1 2 ... 170 171 172 173 174 175 176 177 178 179 180 ... 314 315

Keine Kommentare

Kontron AT8902M CLI Bedienungsanleitung Seite 175