In traditional internet deployment architectures, the service provider provide WiFi access to subscribers based on web-based authentication. These deployment architecture might use access points (AP) which are incapable of RADIUS-based authentication triggers. These access points are only capable of relaying DHCP messages between the subscriber's user equipment (UE) and the DHCP server, to obtain the IP address for the UE, after which the AP forwards data packets between the UE and the default gateway.
With this feature, the SaMOG Gateway can initiate session creation when a DHCP message is received from the AP over the EoGRE tunnel. This feature integrates SaMOG as a gateway in deployment architectures where the AP/WLC cannot initiate RADIUS (Access-Request) messages.
DHCP Relay Agent Information Option
The SaMOG Gateway supports DHCP Relay Agent Information Option (option 82) to determine the AP's location information. This enables the SaMOG Gateway to select policies for the subscriber based on the location information, and share the serving AP's location information with the AAA server during authentication.
The DHCP trigger-based session creation feature does not require a separate license. However, a Local Breakout - Enhanced license is required to configure a local P-GW.
Contact your Cisco account representative for detailed information on specific licensing requirements.