Policy Applications; Basic Qos Policies - Alcatel OmniSwitch 6624 Network Configuration Manual

Configuring QoS

Policy Applications

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, rewriting an IP address, or putting the flow in a
server load balancing group. How the traffic is treated (the action in the policy rule) typically defines the
type of policy:
Type of Policy

Basic QoS policies

ICMP policies
802.1p, ToS, and DSCP tagging or
mapping policies
Access Control Lists (ACLs)
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 refered 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
Traffic priorization and bandwidth shaping may be the most common types of QoS policies. For these
policies, any condition may be created; the policy action indicates how the traffic should be prioritized or
how the bandwidth should be shaped.
ingress flow
OmniSwitch 6624/6648 Network Configuration Guide
Description
Prioritizes particular flows, and/
or shapes the bandwidth for the
flow
Filters, prioritizes, and/or rate
limits ICMP traffic
Sets or resets the egress 802.1p,
ToS, or DSCP values
Groups of policies rules used for
filtering traffic (allow/deny)
Chapter 22, "Configuring ACLs."
Chapter 11, "Configuring Dynamic Link Aggregation."
OmniSwitch
policy condition
classifies the flow
policy action determines
how packets are queued
April 2004
Policy Applications
Action Parameters Used
maximum bandwidth
priority
disposition
priority
maximum bandwidth
802.1p
tos
dscp
map group
disposition
queues for egress traffic
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