S350 Series 24-Port (PoE+) and 48-Port Gigabit Ethernet Smart Managed Pro Switches
Configure System Information User Manual99
Configure 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 dif
ferentiate between untrusted interfaces connected to the end user and
trusted interfaces connected to the DHCP server or another switch.
Configure the Global DHCP Snooping Settings
You can view and configure the global settings for DHCP snooping.
To configure the global DHCP snooping settings:
1. Connect your computer to the same network as the switch.
You can use a WiFi or wired connection to connect your computer to the network, or
connect directly to a switch that is off-network using an Ethernet cable.
2. Launch a web browser.
3. In the address field of your web browser, enter the IP address of the switch.
Network Policies
Application Type The media application type associated with the policy advertised by the
remote device.
VLAN ID The VLAN ID associated with the policy.
VLAN Type Specifies whether the VLAN associated with the policy is tagged or untagged.
User Priority The priority associated with the policy.
DSCP The DSCP associated with a particular policy type.
LLDP Unknown TLVs
Type The unknown TLV type field.
Value
The unknown TLV value field.
Field Description