6-22
<SwitchA> system-view
[SwitchA] dhcp enable
# Enable the DHCP server on VLAN-interface 2.
[SwitchA] interface vlan-interface 2
[SwitchA-Vlan-interface2] dhcp select server global-pool
[SwitchA-Vlan-interface2] quit
# Configure DHCP address pool 0.
[SwitchA] dhcp server ip-pool 0
[SwitchA-dhcp-pool-0] network 10.1.1.0 mask 255.255.255.0
[SwitchA-dhcp-pool-0] option 43 hex 80 0B 00 00 02 01 02 03 04 02 02 02 02
3) Verification
After the preceding configuration is complete, Switch B can obtain its IP address on 10.1.1.0/24 and
PXE server addresses from the Switch A. You can use the
display dhcp server ip-in-use
command
on the DHCP server to view the IP addresses assigned to the clients.
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.
