3com 5500-SI Manual Do Utilizador

C

HAPTER

 10: DHCP S

ERVER

 C

ONFIGURATION

5 Return to system view.

[S5500-dhcp-pool-1] quit

6 Configure DHCP address pool 2, including address range, domain name, DNS server 

address, lease time, NetBIOS server address, and gateway address.

[S5500] dhcp server ip-pool 2

[S5500-dhcp-pool-2] network 10.1.1.128 mask 255.255.255.128

[S5500-dhcp-pool-2] domain-name aabbcc.com

[S5500-dhcp-pool-2] dns-list 10.1.1.2

[S5500-dhcp-pool-2] expired day 5

[S5500-dhcp-pool-2] nbns-list 10.1.1.4

[S5500-dhcp-pool-2] gateway-list 10.1.1.254

The IP address dynamically assigned by a DHCP server to a client conflicts with the IP 
address of another host.

With DHCP enabled, IP address conflicts are usually caused by IP addresses that are 
manually configured on hosts.

■

Disconnect the DHCP client from the network and then check whether there is a 
host using the conflicting IP address by performing ping operation on another host 
on the network, with the conflicting IP address as the destination and an enough 
timeout time.

■

The IP address is manually configured on a host if you receive a response packet of 
the ping operation. You can then disable the IP address from being dynamically 
assigned by using the dhcp server forbidden-ip command.

■

Attach the DHCP client to the network, release the dynamically assigned IP address 
and apply an IP address again. (You can release a dynamically assigned IP address 
by executing the winipcfg command in Windows 98 or by executing the 
ipconfig/release command in Windows 2000/XP. You can refresh the IP address by 
using the ipconfig/release_all and ipconfig/renew_all commands in DOS.)