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HAPTER
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| Security Measures
DHCP Snooping
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3. Enable DHCP Snooping on any existing VLAN.
4. Click Apply
Figure 180: Configuring DHCP Snooping on a VLAN
CONFIGURING PORTS
FOR DHCP SNOOPING
Use the IP Service > DHCP > Snooping (Configure Interface) page to
configure switch ports as trusted or untrusted.
CLI REFERENCES
â—† "ip dhcp snooping trust" on page 730
COMMAND USAGE
â—† A trusted interface is an interface that is configured to receive only
messages from within the network. An untrusted interface is an
interface that is configured to receive messages from outside the
network or fire wall.
â—† When DHCP snooping is enabled both globally and on a VLAN, DHCP
packet filtering will be performed on any untrusted ports within the
VLAN.
â—† When an untrusted port is changed to a trusted port, all the dynamic
DHCP snooping bindings associated with this port are removed.
â—† Set all ports connected to DHCP servers within the local network or fire
wall to trusted state. Set all other ports outside the local network or fire
wall to untrusted state.
PARAMETERS
These parameters are displayed in the web interface:
◆ Trust Status – Enables or disables a port as trusted.
(Default: Disabled)
WEB INTERFACE
To configure global settings for DHCP Snooping:
1. Click Security, IP Source Guard, DHCP Snooping.
2. Select Configure Interface from the Step list.
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