Cisco Catalyst 4500 Series Command Reference Guide

2-622
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
OL-27596 -01
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
set cos
set cos
To set the Layer 2 class of service (CoS) value of a packet, use the set cos command in policy-map class
configuration mode. To remove a specific CoS value setting, use the no form of this command.
set cos {cos-value | from-field [table table-map-name]}
no set cos {cos-value | from-field [table table-map-name]}
Syntax Description
Command Default No CoS value is set for the outgoing packet.
Command Modes Policy-map class configuration mode
Command History
Usage Guidelines The set cos command can be used in an ingress as well as an egress policy map attached to an interface
or VLAN.
You can use this command to specify the “from-field” packet-marking category to be used for mapping
and setting the CoS value. The “from-field” packet-marking categories are as follows:
• Precedence
• Differentiated services code point (DSCP)
• Cost of Service (CoS)
• Quality of Service (QoS) group
cos-value Specific IEEE 802.1Q CoS value from 0 to 7.
from-field Specific packet-marking category to be used to set the CoS value of the
packet. If you are using a table map for mapping and converting
packet-marking values, this establishes the “map from” packet-marking
category. Packet-marking category keywords are as follows:
• precedence
• dscp
• cos
• qos group
table (Optional) Indicates that the values set in a specified table map will be used
to set the CoS value.
table-map-name (Optional) Name of the table map used to specify the CoS value. The table
map name can be a maximum of 64 alphanumeric characters.
Release Modification
12.2(40)SG Support was introduced on Supervisor Engine 6E and Catalyst 4900M.

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