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
access-list hardware capture mode
access-list hardware capture mode
To select the mode of capturing control packets, use the access-list hardware capture mode command.
access-list hardware capture mode {global | vlan}
Syntax Description
Defaults The control packets are globally captured.
Command Modes Global configuration mode
Command History
Usage Guidelines This command is not supported on the Supervisor Engine 6-E and the Catalyst 4900M chassis.
Before configuring the capture mode, it is best to examine and modify your configuration to globally
disable features such as DHCP snooping or IGMP snooping, and instead enable them on specific
VLANs.
When changing to path managed mode, be aware that control traffic may be bridged in hardware or
dropped initially until the per-vlan CAM entries are programmed in hardware.
You must ensure that any access control configuration on a member port or VLAN does not deny or drop
the control packets from being forwarded to the CPU for the features which are enabled on the VLAN.
If control packets are not permitted then the specific feature does not function.
Examples This example shows how to configure the switch to capture control packets on VLANs that are
configured to enable capturing control packets:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# access-list hardware capture mode vlan
Switch(config)# end
Switch#
This example shows how to configure the switch to capture control packets globally across all VLANs
(using a static ACL):
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# access-list hardware capture mode global
Switch(config)# end
Switch#
global Specifies the capture of control packets globally on all VLANs.
vlan Specifies the capture of control packets on a specific VLAN.
Release Modification
12.2(40)SG Support for this command was introduced on the Catalyst 4500 series switch.

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