Alcatel-Lucent 6850-48 ネットワークガイド

Configuring QoS

Policy Applications

OmniSwitch AOS Release 6 Network Configuration Guide

page 40-57

Policies are used to classify incoming flows and treat the relevant outgoing flows. There are many ways to 
classify the traffic and many ways to apply QoS parameters to the traffic.

Classifying traffic may be as simple as identifying a Layer 2 or Layer 3 address of an incoming flow. 
Treating the traffic might involve prioritizing the traffic or rewriting an IP address. How the traffic is 
treated (the action in the policy rule) typically defines the type of policy:

This section describes how to configure basic QoS policies and 802.1p/ToS/DSCP marking and mapping 
policies. Policies used for Layer 2 and Layer 3/4 filters, are commonly referred to as Access Control Lists 
(ACLs). Filtering is discussed in 

Policies may also be used for prioritizing traffic in dynamic link aggregation groups. For more informa-
tion about dynamic link aggregates, see 

Basic QoS policies

Prioritizes particular flows, and/
or shapes the bandwidth for the 
flow

Redirection policies

Redirects flows to a specific port 
or link aggregate ID.

Policy Based Mirroring

Mirrors ingress and egress pack-
ets to a specific port.

ICMP policies

Filters, prioritizes, and/or rate 
limits ICMP traffic

802.1p, ToS, and DSCP tagging or 
mapping policies

Sets or resets the egress 802.1p, 
ToS, or DSCP values

Policy Based Routing (PBR)

Redirects routed traffic. Note 
that PBR is not supported on the 
OmniSwitch 6800.

Access Control Lists (ACLs)

Groups of policies rules used for 
filtering traffic (allow/deny)