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DGS-3200 Series Layer 2 Managed Gigabit Ethernet Switch Web UI Reference Guide
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Figure 6 - 16. DHCP Screening Port Settings window
The user may set the following parameters:
Parameter Description
Trap Log State
Enable or disable this feature.
Suppress Duration
Choose an illegal server log suppress duration of 1 minute, 5 minutes, or 30 minutes.
From Port / To Port
Use the drop-down menu to select a range of ports.
State Choose Enabled to enable the DHCP server screening or Disabled to disable it. The default
is Disabled.
After setting the previous parameters, click Apply to allow your changes to be implemented.
DHCP Offer Filtering
This function allows the user to not only restrict all DHCP Server packets but also to receive any specified DHCP server packet by
any specified DHCP client, it is useful when one or more DHCP servers are present on the network and both provide DHCP
services to different distinct groups of clients. The first time the DHCP filter is enabled it will create both an access profile entry
and an access rule per port entry, it will also create other access rules. These rules are used to block all DHCP server packets. In
addition to a permit DHCP entry, it will also create one access profile and one access rule entry the first time the DHCP client
MAC address is used as the client MAC address. The Source IP address is the same as the DHCP server’s IP address (UDP source
port number 67). These rules are used to permit the DHCP server packets with specific fields, which the user has configured.
To view the following window, click Security > DHCP Server Screening > DHCP Offer Filtering:
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