Operation Manual – DHCP
H3C S5600 Series Ethernet Switches
Chapter 3 DHCP Relay Agent Configuration
3-11
Note:
z
You need to perform corresponding configurations on the DHCP server to enable
the DHCP clients to obtain IP addresses from the DHCP server. The DHCP server
configurations vary with different DHCP server devices, so the configurations are
omitted.
z
The DHCP relay agent and DHCP server must be reachable to each other.
3.5 Troubleshooting DHCP Relay Agent Configuration
I. Symptom
A client fails to obtain configuration information through a DHCP relay agent.
II. Analysis
This problem may be caused by improper DHCP relay agent configuration. When a
DHCP relay agent operates improperly, you can locate the problem by enabling
debugging and checking the information about debugging and interface state (You can
display the information by executing the corresponding display command.)
III. Solution
z
Check if DHCP is enabled on the DHCP server and the DHCP relay agent.
z
Check if an address pool that is on the same network segment with the DHCP
clients is configured on the DHCP server.
z
Check if a reachable route is configured between the DHCP relay agent and the
DHCP server.
z
Check the DHCP relay agent. Check if the correct DHCP server group is
configured on the interface connecting the network segment where the DHCP
client resides. Check if the IP address of the DHCP server group is correct.
z
If the
address-check enable
command is configured on the interface connected
to the DHCP server, verify the DHCP server’s IP-to-MAC address binding entry is
configured on the DHCP relay agent; otherwise the DHCP client cannot obtain an
IP address.
