How To Use Dhcp Relay On The Switch - ZyXEL Communications MES3500-24F User Manual

Chapter 6 Tutorials
Go to Advanced Application > IP Source Guard > DHCP snooping > Configure > VLAN,
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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 the Option82 and Information fields in the entry. See
26.1.1.3 on page
Click Save at the top right corner of the web configurator to save
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the configuration permanently.
Connect your DHCP server to port 5 and a computer (as DHCP client) to either port 6 or 7. The
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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, you should
see an IP assignment with the type dhcp-snooping as shown.
You can also telnet or log into the Switch's console. Use the command "show dhcp snooping
binding" to see the DHCP snooping binding table as shown next.
sysname# show dhcp snooping binding
MacAddress
-----------------
00:02:00:00:00:1c
Total number of bindings: 1

6.2 How to Use DHCP 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.
56
216.
IpAddress
--------------- ------------
10.10.1.16
Lease Type
-------------
6d23h59m20s dhcp-snooping
Section
VLAN Port
---- -----
100 7
MES3500-24/24F User's Guide