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Network configuration
Address allocation
DHCP relay agent
The service controller provides a flexible DHCP relay implementation. It can listen for
requests on the LAN port and forward them to:
the Internet port
an IPSec tunnel operating on the Internet port
a GRE tunnel.
Use the following guidelines when configuring DHCP relay:
Routes must be defined on the DHCP servers so that they can successfully send DHCP
packets back to the DHCP relay agent running on the service controller. These routes
must identify the segment assigned to the service controller LAN port.
External DHCP servers must be reachable through one of the service controller ports.
DHCP relay is not supported when PPPoE is enabled on the Internet port.
DHCP relay cannot work if the internal firewall is set to High and NAT is enabled on the
Internet port. The DHCP server must be able to ping the assigned address to prevent
duplicate assignments.
A separate DHCP relay agent can also be enabled on each VSC. See DHCP relay agent on
page 2-20.
DHCP relay agent configuration
Configure the DHCP relay agent as follows:
1. Select Service Controller >> Network > Address allocation.
2. Select DHCP relay agent and then Configure.
3. Under Settings, select the port on which the service controller listens for DHCP
requests, as follows:
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