TRENDnet TI-RG262i - DHCP Relay

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TRENDnet User’s Guide
Managed Industrial L2 Switch
68
Web Configuration
Advanced Settings > DHCP Options
Parameter
Description
State
Select this option to enable / disable the DHCP option 82 on the
Switch.
Circuit Frame
The frame ID for the circuit sub-option.
Circuit Shelf
The shelf ID for the circuit sub-option.
Circuit Slot
The slot ID for the circuit sub-option.
Circuit-ID String
The String of the circuit ID sub-option information.
Remote-ID String
The String of the remote ID sub-option information.
Apply
Click Apply to save your changes to the Switch.
Refresh
Click Refresh to begin configuring this screen afresh.
DHCP Option 82 Port Settings
Port
The Port ID.
Curcuit-ID String
The String of the circuit ID sub-option information for the specific
port.
Remote-ID String
The String of the remote ID sub-option information for the
specific port.
DHCP Option 82 Port Status
The field displays all of the ports’ configurations.
DHCP Relay
Because the DHCPDISCOVER message is a broadcast message, and broadcasts only cross
other segments when they are explicitly routed, you might have to configure a DHCP
Relay Agent on the router interface so that all DHCPDISCOVER messages can be
forwarded to your DHCP server. Alternatively, you can configure the router to forward
DHCP messages and BOOTP message. In a routed network, you would need DHCP Relay
Agents if you plan to implement only one DHCP server.
The DHCP Relay that either a host or an IP router that listens for DHCP client messages
being broadcast on a subnet and then forwards those DHCP messages directly to a
configured DHCP server. The DHCP server sends DHCP response messages directly back
to the DHCP relay agent, which then forwards them to the DHCP client. The DHCP
administrator uses DHCP relay agents to centralize DHCP servers, avoiding the need for a
DHCP server on each subnet.