Dhcp Snooping; Enable Dhcp Snooping - TRENDnet TPE-224WS User Manual

TRENDnet User's Guide

DHCP Snooping

Here is a summary of the rules to observe when you configure DHCP Snooping:
•
A trusted port is connected to one of the following:
Directly to the legitimate trusted DHCP Server.
o
A network device relaying DHCP messages to and from a trusted
o
server.
Another trusted source such as a switch with DHCP Snooping enabled.
o
Untrusted ports are connected to DHCP clients and to traffic that
o
originates outside of the local area network.
• The VLANs to which the DHCP Snooping feature applies must be specified in
the DHCP Snooping VLAN Setting configuration.
• Any static IP addresses on the network must be manually added to the Binding
Database.

Enable DHCP Snooping

DHCP Snooping > General Settings
1. Log into your switch management page (see
on page 7).
2. Click on DHCP Snooping and click on General Settings.
3. Review the settings. Click Apply to save the settings.
•
DHCP Snooping - Select one of the following radio button choices:
Enabled - This parameter activates the DHCP Snooping feature.
o
Disabled - This parameter de-activates the DHCP Snooping
o
• Pass Through Option 82 - Select one of the following choices from the pull-
down menu:
Enable - Allows an Option 82 packet to be passed through the switch
o
without being altered.
Disable - Blocks an Option 82 packet from passing through the switch.
o
•
Verify MAC Address - Select one of the following choices from the pull-down
menu:
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"Access your switch management page"
Enable - The MAC address of each ingress ARP packet is validated
o
when compared against the Binding Table entries. Invalid ARP packets
are discarded.
Disable - The MAC address of each ingress ARP packet is not validated
o
against the Binding Table. All ARP packets are forwarded through the
switch without regard to the IP and MAC Address information in the
packet header.
• Backup Database - select one of the following choices from the pull-down
menu:
Enable - The Web Management Utility Software saves a backup copy
o
of the Binding Table to flash at a specified interval (Database Update
Interval) of time.
Disable - The Web Management Utility Software does not save a
o
backup copy of the Binding Table to flash.
• Database Update Interval - Enter the database update interval. The range of
this interval is 600 to 86400 seconds.
•
DHCP Option 82 Insertion - select one of the following choices from the pull-
down menu:
Enable: The Web Management Utility software inserts the DHCP
o
Option 82 information into the DHCP packets.
Disable: The Web Management Utility software does not insert the
o
DHCP Option 82 information into the DHCP packets.
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