3Com Switch 8800 Advanced Software V5 Configuration Guide

DHCP Server Configuration Example 733
■ In the address pool 10.1.1.0/25, the address lease duration is ten days and
twelve hours, domain name aabbcc.com, DNS server address 10.1.1.2,
gateway 10.1.1.126, and WINS server 10.1.1.4.
■ In the address pool 10.1.1.128/25, the address lease duration is five days,
domain name aabbcc.com, DNS server address 10.1.1.2, and gateway address
10.1.1.254, and there is no WINS server address.
■ The domain name and DNS server address on the subnets 10.1.1.0/25 and
10.1.1.128/25 are the same. Therefore, a domain name and DNS server
address can be configured only for the subnet 10.1.1.0/24, and the subnet
10.1.1.0/25 and 10.1.1.128/25 can inherit the configuration of the subnet
10.1.1.0/24.
n
In this example, the number of requesting clients connected to Vlan-interface1
should not exceed 122, and that of clients connected to Vlan-interface2 should
not exceed 124.
Network diagram
Figure 215 A DHCP network
Configuration procedure
1 Specify VLAN interfaces and IP addresses for VLAN interfaces (omitted).
2 Configure the DHCP server
# Enable DHCP
<Sysname> system-view
[Sysname] dhcp enable
# Exclude IP addresses (addresses of the DNS server, WINS server and gateways).
[Sysname] dhcp server forbidden-ip 10.1.1.2
[Sysname] dhcp server forbidden-ip 10.1.1.4
[Sysname] dhcp server forbidden-ip 10.1.1.126
[Sysname] dhcp server forbidden-ip 10.1.1.254
# Configure DHCP address pool 0 (address range, client domain name, and DNS
server address).
WINS server
10.1.1.4/25
Client
Switch B
Client
DNS server
10.1.1.2/25
Switch A
DHCP server
Vlan-int2
10.1.1.129/25
Vlan-int1
10. 1.1 .1/ 25
Client Client
Client Client
Vlan-int1
10.1.1.126/25
10. 1.1. 254 /25