3com 5500 User Manual

C

HAPTER

 21: DHCP C

ONFIGURATION

 G

UIDE

Figure 56   Network diagram for DHCP snooping configuration

 

As shown in Figure 56, Ethernet 1/0/5 of Switch is connected to the DHCP server, 
and Ethernet 1/0/1, Ethernet 1/0/2, and Ethernet 1/0/3 are respectively connected 
to Client A, Client B, and Client C.

■

Enable DHCP snooping on Switch.

■

Specify Ethernet 1/0/5 on Switch as a DHCP snooping trusted port.

Note that: Switch 4210support DHCP snooping, but do not support DHCP 
snooping trusted port configuration.

# Enable DHCP snooping on the switch.

[Switch] dhcp-snooping 

# Specify Ethernet 1/0/5 as a trusted port.

[Switch] interface Ethernet1/0/5

[Switch-Ethernet1/0/5] dhcp-snooping trust

[Switch-Ethernet1/0/5] quit 

#

interface Ethernet1/0/5

dhcp-snooping trust

#

dhcp-snooping

# 

Eth1/0/2

Client  B

Switch

Client  A

Eth1/0/1

Client  C

Eth1/0/3

Eth1/0/5

Switch 5500

Release V03.02.04 All 

versions 

Switch 5500G

Release V03.02.04 All 

versions 

Switch 4210

 

All versions