LevelOne GEP-2651 - 2-4.2 Snooping

Publication date: June, 2015
Revision A1
27
2-4.2 Snooping
DHCP Snooping is used to block intruder on the untrusted ports of the switch
device when it tries to intervene by injecting a bogus DHCP reply packet to a
legitimate conversation between the DHCP client and server.
The section describes to configure the DHCP Snooping parameters of the
switch. The DHCP Snooping can prevent attackers from adding their own
DHCP servers to the network.
Web Interface
To configure DHCP snooping in the web interface:
1. Click Configuration, DHCP, Snooping
2. Select “Enabled” in the Mode of DHCP Snooping Configuration.
3. Select “Trusted” of the specific port in the Mode of Port Mode Configuration.
4. Click Apply.
Figure 2-4.2: The DHCP Snooping Configuration
Parameter description:
 Snooping Mode :
Indicates the DHCP snooping mode operation. Possible modes are:
Enabled: Enable DHCP snooping mode operation. When DHCP snooping mode operation is
enabled, the DHCP request messages will be forwarded to trusted ports and only allow reply
packets from trusted ports.
Disabled: Disable DHCP snooping mode operation.