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OmniSwitch 6600 Family Network Configuration Guide April 2006 page 24-1
24 Configuring QoS
Alcatel’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
• 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 Chapter 25, “Configuring ACLs”).
In This Chapter
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 page 24-13)
• Setting up policy components, such as policy conditions and actions (see page 24-22)
• Configuring specific types of policies (see page 24-49)
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 Chapter 23, “Managing Policy
Servers.”