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
clear errdisable
clear errdisable
To re-enable error-disabled VLANs on an interface, use the clear errdisable command.
clear errdisable interface {name} vlan [range]
Syntax Description
Defaults This command has no default settings.
Command Modes Global configuration mode
Command History
Usage Guidelines If a VLAN range is not specified, all VLANs on the specified interface are re-enabled. The clear
errdisable command recovers the disabled VLANs on an interface.
Clearing the error-disabled state from a virtual port does not change the link state of the physical port,
and it does not affect other VLAN ports on the physical port. It does post an event to STP, and spanning
tree goes through its normal process of bringing that VLAN port to the appropriate blocking or
forwarding state.
Examples This example shows how to re-enable a range of disabled VLANs on an interaface:
Switch# clear errdisable interface ethernet2 vlan 10-15
Switch#
Related Commands
interface name Specifies the interface of the VLAN(s) to recover.
vlan Specifies all VLANs on the interface be recovered.
range (Optional) Specifies the VLAN range to be recovered.
Release Modification
12.2(52)SG Added support for per-VLAN error-disable detection.
Command Description
errdisable detect Enables error-disable detection.
show errdisable detect Displays the error-disable detection status.
show interfaces status Displays the interface status or a list of interfaces in
error-disabled state.
switchport port-security Enables port security on an 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