3Com 4210, 5500G, 4200G manual Configuration Procedure # Enable Dhcp snooping on the switch

202CHAPTER 21: DHCP CONFIGURATION GUIDE

Network Diagram Figure 56 Network diagram for DHCP snooping configuration

DHCP Server

Eth1/0/5

Switch

DHCP Snooping

Eth1/0/1 Eth1/0/3

Eth1/0/2

Client A Client B Client C

Networking and As shown in Figure 56, Ethernet 1/0/5 of Switch is connected to the DHCP server, Configuration and Ethernet 1/0/1, Ethernet 1/0/2, and Ethernet 1/0/3 are respectively connected Requirements 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.

Applicable Products

Product series	Software version	Hardware version
Switch 5500	Release V03.02.04	All versions
Switch 5500G	Release V03.02.04	All versions
Switch 4210		All versions

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

Configuration Procedure # 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

Complete Configuration #

interface Ethernet1/0/5 dhcp-snooping trust

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dhcp-snooping

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