H3C Technologies H3C S12500-X Series Switches - Manual (Page 60)

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Figure 19 Network diagram
Configuration procedure
1. Specify IP addresses for the interfaces. (Details not shown.)
2. Configure the DHCP server:
# Enable DHCP.
<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
[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 800B0000020102030402020202
Verifying the configuration
After the preceding configuration is complete, Switch B can obtain its IP address on 10.1.1.0/24 and the
PXE server addresses from the Switch A. You can use the display dhcp server ip-in-use command on the
DHCP server to display 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
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.