3Com 4500 PWR 26-Port Configuration Manual page 496

Analysis
This problem may be caused by improper DHCP relay agent
operates improperly, you can locate the problem by enabling
about debugging and interface state (You can display the information by executing the corresponding
display command.)
S olu ion t
Check if DHCP is enabled on the DHCP server and the DHC
Check if an address pool that is on the sam
on the DHCP server.
Check if a reachable route is con
Check the DHCP relay agent. Check if the correct DHCP server group is configured on the
interface connecting the netwo
of the DHCP server group is correct.
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.
e network segment with the DHCP clients is configured
figured between the DHCP relay agent and the DHCP server.
rk segment where the DHCP client resides. Check if the IP address
40-11
configuration. When a DHCP relay agent
debugging and checking the information
P relay agent.