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
ip dhcp snooping information option
ip dhcp snooping information option
To enable DHCP option 82 data insertion, use the ip dhcp snooping information option command. To
disable DHCP option 82 data insertion, use the no form of this command.
ip dhcp snooping information option format remote-id {hostname | string {word}}
no ip dhcp snooping information option format remote-id {hostname | string {word}}
Syntax Description
Defaults DHCP option 82 data insertion is enabled.
Command Modes Global configuration mode
Command History
Usage Guidelines If the hostname is longer than 63 characters it is truncated to 63 characters in the remote ID.
Examples This example shows how to enable DHCP option 82 data insertion:
Switch(config)# ip dhcp snooping information option
Switch(config)#
This example shows how to disable DHCP option 82 data insertion:
Switch(config)# no ip dhcp snooping information option
Switch(config)#
This example shows how to configure the hostname as the remote ID:
Switch(config)# ip dhcp snooping information option format remote-id hostname
Switch(config)#
The following example shows how to enable DHCP Snooping on VLAN 500 through 555 and option 82
remote ID:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# ip dhcp snooping
format Specifies the option 82 information format.
remote-id Specifies the remote ID for option 82.
hostname Specifies the user-configured hostname for the remote ID.
string word Specifies the user-defined string for the remote ID. The word string can be from
1 to 63 characters long with no spaces.
Release Modification
12.1(12c)EW Support for this command was introduced on the Catalyst 4500 series switch.
12.2(40)SG Added remote-id keyword to support option 82 enhancement.

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