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Configure dhcp snooping – NETGEAR MS510TXPP 8 Port Gigabit PoE Managed Switch User Manual

Page 77

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Smart Managed Pro Switches MS510TX and MS510TXPP

Configure System Information

User Manual

77

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 differentiate between untrusted interfaces connected to the end user and
trusted interfaces connected to the DHCP server or another switch.

Location Information

Civic

The physical location, such as the street address, that the remote device
advertised in the location TLV, for example, 123 45th St. E. The field value
length range is 6–160 characters.

Coordinates

The location map coordinates that the remote device advertised in the
location TLV, including latitude, longitude, and altitude.

ECS ELIN

The Emergency Call Service (ECS) Emergency Location Identification
Number (ELIN) that the remote device advertised in the location TLV. The
field range is 10–25.

Unknown

Displays unknown location information for the remote device.

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