Lantech LGS-2624C User manual - page 212
Relay Server
Indicates the DHCP relay server IP address. A DHCP relay agent is used to
forward and to transfer DHCP messages between the clients and the server
when they are not in the same subnet domain.
Relay Information Mode
Indicates the DHCP relay information mode option operation. Possible
modes are:
Enabled: Enable DHCP relay information mode operation. When DHCP
relay information mode operation is enabled, the agent inserts specific
information (option 82) into a DHCP message when forwarding to DHCP
server and removes it from a DHCP message when transferring to DHCP
client. It only works when DHCP relay operation mode is enabled.
Disabled: Disable DHCP relay information mode operation.
Relay Information Policy
Indicates the DHCP relay information option policy. When DHCP relay
information mode operation is enabled, if agent receives a DHCP message
that already contains relay agent information it will enforce the policy. And it
only works under DHCP if relay information operation mode is enabled.
Possible policies are:
Replace:Replace the original relay information when a DHCP message that
already contains it is received.
Keep:Keep the original relay information when a DHCP message that
already contains it is received.
Drop:Drop the package when a DHCP message that already contains relay
information is received.