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[SwitchA] dhcp enable
Verifying the configuration
# Verify that Switch B can obtain an IP address on subnet 10.1.1.0/24 and the corresponding 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
IP address Client identifier/ Lease expiration Type
Hardware address
10.1.1.2 aabb-aabb-ab01 Jan 14 22:25:03 2015 Auto(C)
Troubleshooting DHCP server configuration
Failure to obtain a non-conflicting IP address
Symptom
A client's IP address obtained from the DHCP server conflicts with an IP address of another host.
Solution
Another host on the subnet might have the same IP address.
To resolve the problem:
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.
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