Configuration Guide     410
Configuring DHCP Service DHCP L2 Relay Configuration
Step 7 ip dhcp l2relay information remote-id 
string
Configure the remote ID. The remote ID configurations of the switch and the DHCP server 
should be compatible with each other.
string: 
Enter the remote ID, which contains up to 64 characters.
Step 8 show ip dhcp l2relay information interface { fastEthernet 
port 
| gigabitEthernet 
port 
| 
port-channel 
port-channel-id
 }
Verify the Option 82 configuration of the port.
Step 9 end
Return to Privileged EXEC Mode.
Step 10 copy running-config startup-config
Save the settings in the configuration file.
The following example shows how to enable Option 82 on port 1/0/7 and configure the 
strategy as replace, the format as normal, the circuit-id as VLAN20 and the remote-id as 
Host1:
Switch#configure
Switch(config)#interface gigabitEthernet 1/0/7
Switch(config-if)#ip dhcp l2relay information option
Switch(config-if)#ip dhcp l2relay information strategy replace
Switch(config-if)#ip dhcp l2relay information format normal
Switch(config-if)#ip dhcp l2relay information circut-id VLAN20
Switch(config-if)#ip dhcp l2relay information remote-id Host1
Switch(config-if)#show ip dhcp l2relay information interface gigabitEthernet 1/0/7
Interface    Option 82 Status   Operation Strategy    Format   Circuit ID     Remote ID      LAG
---------      ----------------          ------------------            -------      ---------       --------              -----
Gi1/0/7       Enable                        Replace                          Normal     VLAN20      Host1               N/A
Switch(config-if)#end
Switch#copy running-config startup-config