Netgear XS712T-100NES Manual Do Utilizador

Services—DHCP Snooping

DHCP Snooping is a useful feature that provides security by filtering untrusted DHCP 
messages and by building and maintaining a DHCP snooping binding table. An untrusted 
message is a message that is received from outside the network or firewall and that can 
cause traffic attacks within your network. The DHCP snooping binding table contains the 
MAC address, IP address, lease time, binding type, VLAN number, and interface information 
that corresponds to the local untrusted interfaces of a switch. An untrusted interface is an 
interface that is configured to receive messages from outside the network or firewall. A 
trusted interface is an interface that is configured to receive only messages from within the 
network.

DHCP snooping acts like a firewall between untrusted hosts and DHCP servers. It also 
provides way to differentiate between untrusted interfaces connected to the end-user and 
trusted interfaces connected to the DHCP server or another switch.

From the Services configuration menu, you can access the following links:

User Priority

The priority associated with the policy.

DSCP

The DSCP associated with a particular policy type.

Type

Displays the unknown TLV type field.

Value

Displays the unknown TLV value field.