Cisco Catalyst 4500 Series Command Reference Guide

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
qos account layer-all encapsulation
qos account layer-all encapsulation
To account for Layer 1 header length of 20 bytes in QoS policing features, use the qos account layer-all
encapsulation command. To disable the use of additional bytes, use the no form of this command.
qos account layer-all encapsulation
no qos account layer-all encapsulation
Syntax Description This command has no arguments or keywords.
Defaults On Supervisor Engine 6-E, Supervisor Engine 6L-E, Catalyst 4900M, and Catalyst 4948E, policers
account only for the Layer 2 header length in policing features. In contrast, shapers account for header
length as well as IPG in rate calculations.
Command Modes Global configuration
Command History
Usage Guidelines Supervisor Engine 6-E, Supervisor Engine 6L-E, Catalyst 4900M, and Catalyst 4948E use the qos
account layer-all encapsulation command to account for Layer 1 header of 20 bytes ( preamble + IPG)
and Layer 2 header in policing features. When this command is configured, policer statistics ( in bytes )
observed in the output of the show policy-map interface command reflect the Layer 1 header length as
well ( 20 bytes per packet).
Examples This example shows how to shows how to include IPG in policing:
Switch)# config t
Switch(config)# qos account layer-all encapsulation
Switch(config)# end
Switch#
Related Commands
Release Modification
15.0(2)SG Support for this command was introduced on the Catalyst 4500 series switch.
Command Description
show policy-map interface Displays policer statistics on a specific interface.

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