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7 Go to Advanced Application > IP Source Guard > IPv4 Source Guard Setup > DHCP
Snooping > Configure > VLAN, show VLAN 100 by entering 100 in the Start VID and End VID
fields and click Apply. Then select Yes in the Enabled field of the VLAN 100 entry shown at the
bottom section of the screen.
If you want to add more information in the DHCP request packets such as source VLAN ID or
system name, you can also select an Option82 Profile in the entry. See Section 26.11.1.3 on page
242.
Figure 34 Tutorial: Enable DHCP Snooping on this VLAN
8 Click Save at the top right corner of the web configurator to
save the configuration permanently.
9 Connect your DHCP server to port 5 and a computer (as DHCP client) to either port 6 or 7. The
computer should be able to get an IP address from the DHCP server. If you put the DHCP server on
port 6 or 7, the computer will not able to get an IP address.
10 To check if DHCP snooping works, go to Advanced Application > IP Source Guard > IPv4
Source Guard Setup, you should see an IP assignment with the type DHCP-Snooping as shown.
Figure 35 Tutorial: Check the Binding If DHCP Snooping Works
6.3 How to Use DHCPv4 Relay on the Switch
This tutorial describes how to configure your Switch to forward DHCP client requests to a specific
DHCP server. The DHCP server can then assign a specific IP address based on the information in the
DHCP requests.
6.3.1 DHCP Relay Tutorial Introduction
In this example, you have configured your DHCP server (192.168.2.3) and want to have it assign a
specific IP address (say 172.16.1.18) to DHCP client A based on the system name, VLAN ID and
port number in the DHCP request. Client A connects to the Switch’s port 2 in VLAN 102.
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