Layer 3 Routing Commands 1451User GuidelinesThis command globally enables inclusion of DHCP option 82 in DHCPrequests forwarded to the DHCP server. This information may also be relayedon a per interface basis using the ip dhcp relay information option-insertcommand.Enable DHCP Relay using the ip helper enable command.When in Virtual Router Configuration mode, this command operates withinthe context of the virtual router instance. When in Global Configurationmode, the command operates on the global router instance.Virtual Router Configuration mode is only available on theN3000/N3100/N4000 switches.ExampleThe following example enables the circuit ID and remote agent ID options.console(config)#ip dhcp relay information optionip dhcp relay information option-insertUse the ip dhcp relay information option-insert command in InterfaceConfiguration mode to enable the circuit ID option and remote agent IDmode for BootP/DHCP Relay on the interface (also called option 82). Use theno form of the command to return the configuration to the default.Syntaxip 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 optionsinto DHCP requests forwarded to the DHCP server.Default ConfigurationDisabled is the default configuration.Command ModeInterface (VLAN) Configuration mode
