Alcatel-Lucent 6850-48 Guida Di Rete

OmniSwitch AOS Release 6 Network Configuration Guide

page 40-1

Alcatel-Lucent’s QoS software provides a way to manipulate flows coming through the switch based on 
user-configured policies. The flow manipulation (generally referred to as Quality of Service or QoS) may 
be as simple as allowing/denying traffic, or as complicated as remapping 802.1p bits from a Layer 2 
network to ToS values in a Layer 3 network.

While policies may be used in many different types of network scenarios, there are several typical types 
discussed in this chapter:

• Basic QoS—includes traffic prioritization and bandwidth shaping.

• ICMP policies—includes filtering, prioritizing, and/or rate limiting ICMP traffic for security.

• 802.1p/ToS/DSCP—includes policies for marking and mapping.

• Policy Based Routing (PBR)—includes policies for redirecting routed traffic.

• Policy Based Mirroring—includes mirror-to-port (MTP) policies for mirroring ingress, egress, or both 

ingress and egress traffic.

• Access Control Lists (ACLs)—ACLs are a specific type of QoS policy used for Layer 2 and 

Layer 3/4 filtering. Since filtering is used in many different network situations, ACLs are described in a 
separate chapter (see 

). 

This chapter describes QoS in general and how policies are used on the switch. It provides information 
about configuring QoS through the Command Line Interface (CLI). CLI commands are used in the config-
uration examples; for more details about the syntax of commands, see the OmniSwitch CLI Reference 
Guide.

Configuration procedures described in this chapter include:

• Setting up global QoS parameters (see 

• Configuring QoS Ports and Queueing Schemes 

• Setting up policy components, such as policy conditions and actions (see 

)

• Configuring specific types of policies (see 

Note. Policies may also be configured through the PolicyView NMS application and stored on an attached 
LDAP server. LDAP policies are downloaded to the switch and managed via the Policy Manager feature 
in the switch. For more information about managing LDAP policies, see