Cisco Catalyst 4500 Series Administration Guide

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Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
OL_28731-01
Chapter 42 Configuring Quality of Service
Configuring VSS QoS
For a standalone supervisor engine, you must reboot the engine after applying this command.
For redundant supervisors in SSO mode, you must enter the redundancy reload shelf command enforce
reboot to both the supervisors. For redundancy supervisors in RPR mode, you must execute two
consecutive switchovers to enforce the system queue limit on both the supervisors.
This example shows how to set the queue limit globally to 1024 on a standalone supervisor engine:
Switch> enable
Switch# configure terminal
Switch(config)# hw-module system max-queue-limit 1024
Switch(config)# exit
Switch# reload (for standalone supervisors)
Switch# redundancy reload shelf (for redundancy supervisors in SSO mode)
or
Switch# redundancy force-switchover (followed by another redundancy force-switchover, for
redundancy supervisors in RPR mode)
Configuring VSS QoS
Note HQoS is not supported on the Catalyst 4500 Series Switch.
Topics include:
• MQC-based QoS Configuration, page 42-48
• Platform-supported Classification Criteria and QoS Features, page 42-48
• Platform Hardware Capabilities, page 42-49
• Prerequisites for Applying a QoS Service Policy, page 42-49
• Restrictions for Applying a QoS Service Policy, page 42-50
• Classification, page 42-50
• Policing, page 42-51
• Marking Network Traffic, page 42-52
• Shaping, Sharing (Bandwidth), Priority Queuing, Queue-limiting and DBL, page 42-59
• Enabling Per-Port Per-VLAN QoS, page 42-70
• Applying Flow-based QoS Policy, page 42-75
• Configuring CoS Mutation, page 42-79
• Configuring System Queue Limit, page 42-80
MQC-based QoS Configuration
Note Starting with Cisco IOS Release 12.2(40)SG, a Catalyst 4900M, a Catalyst 4948E, or a Catalyst 4500
Series Switch with Supervisor Engine 6-E or Supervisor Engine 6L-E use the MQC model of QoS.
To apply QoS, you use the Modular QoS Command-Line Interface (MQC), which is a CLI structure that
allows you to complete the following tasks:

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E