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User Guide 938
Configuring DHCP Filter Configuration Examples
4
Configuration Examples
4.1 Example for DHCPv4 Filter
4.1.1 Network Requirements
As shown below, all the DHCPv4 clients get IP addresses from the legal DHCPv4 server,
and any other DHCPv4 server in the LAN is regarded as illegal. Now it is required that only
the legal DHCPv4 server is allowed to assign IP addresses to the clients.
Figure 4-1 Network Topology
Gi1/0/1
DHCPv4 ClientDHCPv4 Client
Illegal DHCPv4
Server
DHCPv4 Client
Switch A
Legal DHCPv4 Server
192.168.0.200
4.1.2 Configuration Scheme
To meet the requirements, you can configure DHCPv4 Filter to filter the DHCPv4 packets
from the illegal DHCPv4 server.
The overview of configuration is as follows:
1) Enable DHCPv4 Filter globally and on all ports.
2) Create an entry for the legal DHCPv4 server.
Demonstrated with T1600G-28TS, the following sections provide configuration procedure
in two ways: using the GUI and using the CLI.
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