3com 5500 用户手册

C

HAPTER

 21: DHCP C

ONFIGURATION

 G

UIDE

# Enable DHCP.

[SwitchA] dhcp enable 

# Exclude the IP addresses of the DNS server, WINS server, and gateways from 
dynamic assignment.

[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 

# Enable unauthorized DHCP server detection.

[SwitchA] dhcp server detect 

# Configure the address range, domain name suffix and DNS server address in 
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] domain-name aabbcc.com

[SwitchA-dhcp-pool-0] dns-list 10.1.1.2

[SwitchA-dhcp-pool-0] quit 

# Configure the address range, gateway address, and lease duration in DHCP 
address pool 1.

[SwitchA] dhcp server ip-pool 1

[SwitchA-dhcp-pool-1] network 10.1.1.0 mask 255.255.255.128

[SwitchA-dhcp-pool-1] gateway-list 10.1.1.126

[SwitchA-dhcp-pool-1] expired day 10 hour 12

[SwitchA-dhcp-pool-1] quit 

# Configure the address range, lease duration, DNS server address and gateway 
address in DHCP address pool 2.

[SwitchA] dhcp server ip-pool 2

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

[SwitchA-dhcp-pool-2] expired day 5

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

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

[SwitchA-dhcp-pool-2] quit 

With the unauthorized DHCP server detection enabled, Switch A will log 
information about all DHCP servers, including authorized ones. The administrator 
needs to find unauthorized DHCP servers from the system log information. If 
Switch A detects an unauthorized DHCP server, the following log information is 
recorded.

Switch 5500

Release V03.02.04 All 

versions 

Switch 5500G

Release V03.02.04 All 

versions