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Troubleshooting DHCP Server Configuration
Symptom
A client’s IP address obtained from the DHCP server conflicts with another IP address.
Analysis
A host on the subnet may have the same IP address.
Solution
1) Disconnect the client’s network cable and ping the client’s IP address on another host with a long
timeout time to check whether there is a host using the same IP address.
2) If a ping response is received, the IP address has been manually configured on the host. Execute
the
dhcp server forbidden-ip
command on the DHCP server to exclude the IP address from
dynamic allocation.
3) Connect the client’s network cable. Release the IP address and obtain another one on the client.
Take WINDOW XP as an example, run
cmd
to enter DOS window. Type
ipconfig/release
to
relinquish the IP address and then
ipconfig/renew
to obtain another IP address.
