With explicit home authentication (see Figure: Explicit home authentication ), the BRG authenticates itself at boot time before allowing connectivity of any devices. The vRGW acts as a proxy for this authentication, and upon receipt of a successful authentication, the BRG context is created and stores all home parameters. As with implicit authentication, the vRGW performs authentication for each device and expects the BRG ID as a result.
On the router, this functionality is obtained by including a RADIUS proxy in the vRGW configuration. This RADIUS proxy can be used for both WLAN-GW and vRGW scenarios and determines the difference based on the presence of a BRG ID attribute in the Access-Accept message. Proxy transactions in the context of a BRG are not cached. Instead, a fully functional BRG context is already created. Track accounting is not supported in the context of a BRG. Re-authentication is supported and behaves the same as on a CoA at the BRG level.