Dhcp Offer Permit Entry Settings; Filter Dhcpv6 Server - D-Link xStack Reference Manual

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xStack DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch Web UI Reference Guide
Parameter
DHCP Server Screening
Trap State
DHCP Server Screening
Log State
Illegal Server Log
Suppress Duration
Unit
From Port / To Port
State
Click the Apply button to accept the changes made for each individual section.

DHCP Offer Permit Entry Settings

Users can add or delete permit entries on this page.
To view this window, click Security > DHCP Server Screening > DHCP Offer Permit Entry Settings as shown
below:
The fields that can be configured are described below:
Parameter
Server IP Address
Client's MAC Address
Ports
Click the Apply button to accept the changes made.
Click the Delete button to remove the specific entry based on the information entered.

Filter DHCPv6 Server

This page has two purposes: to specify to filter all DHCP server packets on the specific port and to specify to allow
some DHCP server packets with pre-defined server IP addresses and client MAC addresses. With this function, we
can restrict the DHCP server to service specific DHCP clients. This is useful when two DHCP servers are present
on the network; one of them can provide the private IP address and the other can provide the public IP address.
Enabling filter DHCP server port state will create one access profile and create one access rule per port (UDP port
is equal to 67). Filter commands in this file will share the same access profile. Addition of a permit DHCP entry will
create one access profile and create one access rule. Filter commands in this file will share the same access profile.
Description
Click to enable or disable filtering DHCP server trap.
Click to enable or disable filtering DHCP server log.
Choose an illegal server log suppress duration of 1 minute, 5 minutes, or 30
minutes.
Select the unit you wish to configure.
A consecutive group of ports may be configured starting with the selected port.
Choose Enabled to enable the DHCP server screening or Disabled to disable it.
The default is Disabled.
Figure 9-62 DHCP Offer Permit Entry Settings window
Description
The IP address of the DHCP server to be permitted.
The MAC address of the DHCP client.
The port numbers of the filter DHCP server. Tick the All Ports check box to include
all the ports on this switch for this configuration.
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