H3C Technologies H3C S12500-X Series Switches - Manual (Page 57)

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Dynamic IP address assignment configuration example
Network requirements
• As shown in Figure 17 , the DHCP server (Switch A) assigns IP addresses to clients in subnet
10.1.1.0/24, which is subnetted into 10.1.1.0/25 and 10.1.1.128/25.
• The IP addresses of VLAN-interfaces 10 and 20 on Switch A are 10.1.1.1/25 and 10.1.1.129/25.
• In address pool 10.1.1.0/25, configure the address lease duration as ten days and twelve hours,
domain name suffix aabbcc.com, DNS server address 10.1.1.2/25, gateway 10.1.1.126/25, and
WINS server 10.1.1.4/25.
• In address pool 10.1.1.128/25, configure the address lease duration as five days, domain name
suffix aabbcc.com, DNS server address 10.1.1.2/25, and gateway address 10.1.1.254/25, and
there is no WINS server address.
Figure 17 Network diagram
Configuration procedure
1. Specify IP addresses for the VLAN interfaces. (Details not shown.)
2. Configure the DHCP server:
# Enable DHCP.
<SwitchA> system-view
[SwitchA] dhcp enable
# Enable the DHCP server on VLAN-interface 10 and VLAN-interface 20.
[SwitchA] interface vlan-interface 10
[SwitchA-Vlan-interface10] dhcp select server
[SwitchA-Vlan-interface10] quit
[SwitchA] interface vlan-interface 20
[SwitchA-Vlan-interface20] dhcp select server
[SwitchA-Vlan-interface20] quit
# Exclude IP addresses (addresses of the DNS server, WINS server and gateways).
[SwitchA] dhcp server forbidden-ip 10.1.1.2
[SwitchA] dhcp server forbidden-ip 10.1.1.4
[SwitchA] dhcp server forbidden-ip 10.1.1.126
[SwitchA] dhcp server forbidden-ip 10.1.1.254