Cisco Catalyst 4500 Series Command Reference Guide

2-633
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
shape (class-based queueing)
shape (class-based queueing)
To enable traffic shaping a class of traffic in a policy map attached to a physical port, use the shape
average policy-map class command. Traffic shaping limits the data transmission rate. To return to the
default setting, use the no form of this command.
shape average {rate} [bps | kbps | mbps | gbps]
shape average percent {percent_value}
no shape average
Syntax Description
Defaults Average-rate traffic shaping is disabled.
Command Modes Policy-map class configuration mode
Command History
Usage Guidelines Use the shape command only in a policy map attached to a physical port. This command is valid in
policy maps at any level of the hierarchy.
Shaping is the process of delaying out-of-profile packets in queues so that they conform to a specified
profile. Shaping is distinct from policing. Policing drops packets that exceed a configured threshold, but
shaping buffers packets so that traffic remains within the threshold. Shaping offers greater smoothness
in handling traffic than policing.
You cannot use the bandwidth, dbl, and the shape policy-map class configuration commands with the
priority policy-map class configuration command in the same class within the same policy map.
However, you can use these commands in the same policy map.
To return to policy-map configuration mode, use the exit command. To return to privileged EXEC mode,
use the end command.
rate Specifies an average rate for traffic shaping; the range is 16000 to 10000000000.
Post-fix notation (k, m, and g) is optional and a decimal point is allowed.
bps (Optional) Specifies a rate in bits per seconds.
kbps (Optional) Specifies a rate in kilobytes per seconds.
mbps (Optional) Specifies a rate in megabits per seconds.
gbps (Optional) Specifies a rate in gigabits per seconds.
percent Specifies a percentage of bandwidth for traffic shaping.
percent_value (Optional) Specifies a percentage of the bandwidth used for traffic shaping; valid
values are from 1 to 100 percent.
Release Modification
12.2(40)SG This command was introduced on the Catalyst 4500 series switch using a
Supervisor Engine 6E.

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