Users Guide

Layer 3 Routing Commands 1492
User Guidelines
This command globally enables inclusion of DHCP option 82 in DHCP
requests forwarded to the DHCP server. This information may also be relayed
on a per interface basis using the ip dhcp relay information option-insert
command.
Enable DHCP Relay using the ip helper enable command.
When in Virtual Router Configuration mode, this command operates within
the context of the virtual router instance. When in Global Configuration
mode, the command operates on the global router instance.
Virtual Router Configuration mode is only available on the
N3000/N3100/N4000 switches.
Example
The following example enables the circuit ID and remote agent ID options.
console(config)#ip dhcp relay information option
ip dhcp relay information option-insert
Use the ip dhcp relay information option-insert command in Interface
Configuration mode to enable the circuit ID option and remote agent ID
mode for BootP/DHCP Relay on the interface (also called option 82). Use the
no form of the command to return the configuration to the default.
Syntax
ip dhcp relay information option-insert [none]
no ip dhcp relay information option-insert
• none—Use to disable insertion of circuit id and remote agent id options
into DHCP requests forwarded to the DHCP server.
Default Configuration
Disabled is the default configuration.
Command Mode
Interface (VLAN) Configuration mode