Cisco Catalyst 4500 Series Software Configuration Guide

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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 44 Configuring Quality of Service
Configuring Auto-QoS on a Standalone Supervisor Engine 6-E/6L-E or Supervisor Engine 7-E/7L-E/8-E
bandwidth remaining percent 10
Class AutoQos-4.0-Multimedia-Conf-Queue
bandwidth remaining percent 10
Class AutoQos-4.0-Multimedia-Stream-Queue
bandwidth remaining percent 10
Class AutoQos-4.0-Trans-Data-Queue
bandwidth remaining percent 10
dbl
Class AutoQos-4.0-Bulk-Data-Queue
bandwidth remaining percent 4
dbl
Class class-default
bandwidth remaining percent 25
dbl
The three policy maps are defined as follows:
• policy-map AutoQos-VoIP-Input-Dscp-Policy
This policy map is applied as an input service policy on an Layer 3 interface (such as an uplink
connection to a neighboring switch) when auto-QoS is configured on the port.
• policy-map AutoQos-VoIP-Input-Cos-Policy
This policy map is applied as an input service policy on an Layer 2 interface that could be either an
uplink connection or a port hooked to a Cisco IP Phone.
• policy-map AutoQos-VoIP-Output-Policy
This policy map is applied as an output policy for any port on which auto-QoS is configured,
establishing policy governing egress traffic on the port based on whether it is voice data or control
traffic.
The purpose of the input policy maps is to identify voice data or control traffic and mark it as such as it
traverses the switch. The output policy map matches the packets on the marking occurring on ingress
and then applies egress parameters such as bandwidth, policing and/or priority queuing.
For switch-to-switch connections, the [no] auto qos voip trust command is used to apply an input and
output service policy on the interface:
service-policy input AutoQos-VoIP-Input-Cos-Policy
OR
service-policy input AutoQos-VoIP-Input-Dscp-Policy
AND
service-policy output AutoQos-VoIP-Output-Policy
The selection of the input policy depends on whether the port is Layer 2 or Layer 3. For Layer 2, the
policy trusts the Cos setting in the received packets. For Layer 3 ports, it relies on the DSCP value
contained in the packets.
For phone connected ports, the [no] auto qos voice cisco-phone command is used to apply the following
service policy to the port:
qos trust device cisco-phone
service-policy input AutoQos-VoIP-Input-Cos-Policy
AND
service-policy output AutoQos-VoIP-Output-Policy

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