Configuring DHCP Snooping
Page 94
To define DHCP Snooping on VLANs:
1.
Click
DHCP Snooping > VLAN Settings
. The
VLAN Settings Page
opens:
Figure 55: VLAN Settings Page
The
VLAN Settings Page
contains the following fields:
•
VLAN ID
— Indicates the VLAN to be added to the Enabled VLAN list.
•
Enabled VLANs
— Contains a list of VLANs for which DHCP Snooping is enabled.
2.
Select the VLAN name from the VLAN ID list and click
Add
. This VLAN name then appears in the
Enabled
VLANs
list.
3.
Click
Save Config
on the menu to save the changes permanently.
Defining Trusted Interfaces
The
Trusted Interfaces Page
allows network manager to define Trusted interfaces. Trusted interfaces are
connected to DHCP servers, switches, or hosts which do not require DHCP packet filtering. Trusted interfaces
receive packets only from within the network or the network firewall, and are allowed to respond to DHCP
requests. Packets sent from an interface outside the network, or from beyond the network firewall, are blocked by
untrusted interfaces.
Conversely, untrusted interfaces can be configured to receive traffic from outside the network or the firewall.