Ip Dhcp Snooping Information Option - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

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.
Syntax Description
format
remote-id
hostname
string word
Defaults DHCP option 82 data insertion is enabled.
Command Modes
Global configuration mode
Command History Release
12.1(12c)EW
12.2(40)SG
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
OL-27596 -01
ip dhcp snooping information option format remote-id {hostname | string {word}}
no ip dhcp snooping information option format remote-id {hostname | string {word}}
Specifies the option 82 information format.
Specifies the remote ID for option 82.
Specifies the user-configured hostname for the remote ID.
Specifies the user-defined string for the remote ID. The word string can be from
1 to 63 characters long with no spaces.
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Added remote-id keyword to support option 82 enhancement.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
ip dhcp snooping information option
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