ifs NS4702-24P-4X-V2 User Manual page 306

Chapter 4: Web configuration
The page includes the following fields:
Object
Snooping Mode
Port Mode
Configuration
Buttons
• Click Apply to apply changes.
• Click Reset to undo any changes made locally and revert to previously saved
values.
Snooping table
The Dynamic DHCP Snooping Table page displays the dynamic IP assigned
information after DHCP Snooping mode is disabled. All DHCP clients that obtained the
dynamic IP address from the DHCP server will be listed in this table except for local
VLAN interface IP addresses. Entries in the Dynamic DHCP snooping Table are shown
on this page.
Buttons
• Click Auto-refresh
every three seconds.
• Click >> to use the last entry of the currently displayed table as a basis for the next
lookup. "No more entries" is shown in the table.
• Click I<< to start over.
IP source guard configuration
IP Source Guard is a secure feature used to restrict IP traffic on DHCP snooping
untrusted ports by filtering traffic based on the DHCP Snooping Table or manually
configured IP Source Bindings. It helps prevent IP spoofing attacks when a host tries to
302
Description
Indicates the DHCP snooping mode operation. Possible modes are:
Enabled: Enable DHCP snooping mode operation. When the DHCP
snooping mode operation is enabled, the request DHCP messages will be
forwarded to trusted ports and only allow reply packets from trusted ports.
Disabled: Disable the DHCP snooping mode operation.
Indicates the DHCP snooping port mode. Possible port modes are:
Trusted: Configures the port as trusted sources of the DHCP message.
Untrusted: Configures the port as untrusted sources of the DHCP message.
to refresh the page automatically. Automatic refresh occurs
NS4702-24P-4X-V2 Managed Switch User Manual