H3C Technologies H3C S5560 Series Switches - Manual (Page 68)

53
Verifying the configuration
# Verify that Switch B can obtain an IP address on 10.1.1.0/24 and the PXE server addresses from the
Switch A. (Details not shown.)
# On the DHCP server, display the IP addresses assigned to the clients.
[SwitchA] display dhcp server ip-in-use
Troubleshooting DHCP server configuration
Symptom
A client's IP address obtained from the DHCP server conflicts with another IP address.
Analysis
Another host on the subnet might have the same IP address.
Solution
1. Disable the client's network adapter or disconnect the client's network cable. Ping the IP address
of the client from another host 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 a host. Execute the
dhcp server forbidden-ip command on the DHCP server to exclude the IP address from dynamic
allocation.
3. Enable the network adapter or connect the network cable, release the IP address, and obtain
another one on the client. For example, to release the IP address and obtain another one on a
Windows XP DHCP client:
a. In Windows environment, execute the cmd command to enter the DOS environment.
b. Enter ipconfig /release to relinquish the IP address.
c. Enter ipconfig /renew to obtain another IP address.