H3C Technologies H3C S7500E Series Switches - Manual (Page 61)

5-18
Using the save command does not save DHCP server lease information. Therefore, when the system
boots up or the reset dhcp server ip-in-use command is executed, no lease information will be
available in the configuration file. In this case, the server will deny the request for lease extension from
a client and the client needs to request an IP address again.
DHCP Server Configuration Examples
DHCP networking involves two types:
z The DHCP server and client are on the same subnet and exchange messages directly.
z The DHCP server and client are not on the same subnet and they communicate with each other
via a DHCP relay agent.
The DHCP server configuration for the two types is the same.
Static IP Address Assignment Configuration Example
Network requirements
As shown in Figure 5-1 , Switch B and Switch C obtain the static IP address, DNS server address, and
gateway address from Switch A (DHCP server).
The client ID of VLAN-interface 2 on Switch B is
3030-3066-2e65-3234-392e-3830-3530-2d56-6c61-6e2d-696e-7465-7266-6163-6532. The MAC
address of VLAN-interface 2 on Switch C is 000f-e249-8050.
Figure 5-1 Network diagram for static IP address assignment
Configuration procedure
1) Configure the IP address of VLAN-interface 2 on Switch A.
system-view
[SwitchA] interface vlan-interface 2
[SwitchA-Vlan-interface2] ip address 10.1.1.1 25
[SwitchA-Vlan-interface2] quit
2) Configure the DHCP server