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# Enable DHCP.
<RouterA> system-view
[RouterA] dhcp enable
# Enable the DHCP relay agent on GigabitEthernet 2/0/1.
[RouterA] interface gigabitethernet 2/0/1
[RouterA-GigabitEthernet2/0/1] dhcp select relay
# Specify the IP address of the DHCP server on the relay agent.
[RouterA-GigabitEthernet2/0/1] dhcp relay server-address 10.1.1.1
# Enable the DHCP relay agent to handle Option 82, and perform Option 82 related configuration.
[RouterA-GigabitEthernet2/0/1] dhcp relay information enable
[RouterA-GigabitEthernet2/0/1] dhcp relay information strategy replace
[RouterA-GigabitEthernet2/0/1] dhcp relay information circuit-id string company001
[RouterA-GigabitEthernet2/0/1] dhcp relay information remote-id string device001
Troubleshooting DHCP relay agent configuration
Symptom
DHCP clients cannot obtain configuration parameters through the DHCP relay agent.
Analysis
Some problems might occur with the DHCP relay agent or server configuration.
Solution
To locate the problem, enable debugging and execute the display command on the DHCP relay
agent to view the debugging information and interface state information.
Check that:
• DHCP is enabled on the DHCP server and relay agent.
• The DHCP server has an address pool on the same subnet as the DHCP clients.
• The DHCP server and DHCP relay agent can reach each other.
• The DHCP server address specified on the DHCP relay interface connected to the DHCP
clients is correct.
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