Allied Telesis AlliedWare Plus - page 34

Page 34 | AlliedWare Plus™ OS: Overview of QoS

Use the following commands to configure this policing scenario:

mls qos enable

mls qos aggregate-police aggr1 twin-rate 1000 200 5000 1000

exceed-action drop

class-map cm1

match ip-dscp 35

class-map cm2

match access-group 3000

policy-map pm1

class cm1

police aggregate aggr1

class cm2

police single-rate 3000 200 4000 exceed-action drop

interface port1.3.1-1.3.3

service-policy input pm1

The VoIP traffic is identified by having a DSCP value of 35, and the web traffic by matching an

ACL (which could match on TCP port).

Contents

Main AlliedWare PlusTM OS Overview of | 1 Quality of Service Features on x900- Introduction 2, x900-24, and SwitchBlade x908 Switches Contents Which products and software version does this Note apply to? The process flow and methodology of the QoS system Packet markers Outline of the QoS processing flow 1 Initial mapping to an egress queue, based on 802. p value Classification Premarking Policing Limiting or remarking (dropping non-conformant packets) Queue shaping Scheduling Details of the component processes, and how to configure them QoS elements: policy maps, class maps, policers, matches The default class map Page 11 | AlliedWare Plus OS: Overview of QoS Diagram of the overall QoS process flow Enabling QoS globally Initial mapping to queue based on tag Classification Premarking Setting new values explicitly Using the mark-dscp map Page Policing Applying ordinary policers to class maps Applying aggregate policers to class maps Single-rate policing Twin-rate policing Counting policed packets Page Remarking 1 To add values to the policed-dscp map, enter the command: Queue shapingqueue sets, RED, and tail-drop Random-detect modeusing RED Page Page Tail-drop mode Scheduling Page Egress bandwidth limiting Policing Examples 1 : Policing separate traffic types on separate ports Page 2: Policing one traffic type on combined ports 3: Policing one traffic type on separate ports, and another traffic type on the same ports combined Page 4: Policing combined traffic types on separate ports Page 5: Policing combined traffic types on combined ports Fabric Q oS Mapping the queues in the switching instances to queues in the fabric Scheduling the queues within the fabric