PPPoE and Radius

The PPPoE (Point to Point Protocol over Etherneti) protocol provides extensive user management, network management, and accounting benefits to ISPs and network administrators. PPPoE is used by service providers to control client connections for xDSL and cable modems. PPPoE is an extension of the standard dial-up and synchronous protocol PPP, but the transport is over Ethernet rather than a modem.

PPPoE is used to hand out IPi addresses to clients based on the user authentication. Do not use static IP addresses (Manual) or DHCPi (DHCPc) on interfaces on which the PPPoE is used for security reasons.

A PPPoE connection is composed of a client and an access concentrator (server). The client may be a Windows computer that has the PPPoE client protocol installed on it. The router supports both the client and access concentrator implementations of PPPoE. The PPPoE client and server work over any Ethernet level interface on the router wireless 802.11, 10/100/1000 Mb/s Ethernet.

A PPPoE supports three options for encryptioni: No encryption, 40bit RSA, and 128bit RSA encryption.

The Router has a RADIUS client that can be used for authentication of all PPP type connections including PPPoE.

Figure 6-3: PPPoE and RADIUS example.