Dhcp Relay Agent Option 82 Support Configuration Example - HP 4800G Series Configuration Manual

Figure 3-3 Network diagram for DHCP relay agent
DHCP client DHCP client
DHCP client
Configuration procedure
# Specify IP addresses for the interfaces (omitted).
# Enable DHCP.
<SwitchA> system-view
[SwitchA] dhcp enable
# Add DHCP server 10.1.1.1 into DHCP server group 1.
[SwitchA] dhcp relay server-group 1 ip 10.1.1.1
# Enable the DHCP relay agent on VLAN-interface 1.
[SwitchA] interface vlan-interface 1
[SwitchA-Vlan-interface1] dhcp select relay
# Correlate VLAN-interface 1 to DHCP server group 1.
[SwitchA-Vlan-interface1] dhcp relay server-select 1
Performing the configuration on the DHCP server is also required to guarantee the client-server
communication via the relay agent. Refer to
server configuration information.
Because the DHCP relay agent and server are on different subnets, you need to configure a static
route or dynamic routing protocol to make them reachable to each other.

DHCP Relay Agent Option 82 Support Configuration Example

Network requirements
As shown in
Configure the handling strategy for DHCP requests containing Option 82 as replace.
Configure the padding content for the circuit ID sub-option as company001 and for the remote ID
sub-option as device001.
Vlan-int1 Vlan-int2
10.10.1.1/24 10.1.1.2/24
10.1.1.1/24
Switch A
DHCP relay agent
DHCP client
Figure 3-3, Enable Option 82 on the DHCP relay agent (Switch A).
Vlan-int2
Switch B
DHCP server
DHCP Server Configuration Examples
3-10
for DHCP