Configuring PADN Messages

You can configure PPPoE to receive PPPoE Active Discovery Network (PADN) messages. When a client connects to a PPPoE server, such as an ERX system, the client receives configuration information from the server via the PADN message. This PADN information associates the PPPoE sessions with a set of routes. The client can use this set of routes to determine which session to use based on the destination IP address.

The PADN packet data is relevant only when the PPP network layer is "up." To reach an up state, PPP alerts PPPoE after the Network Control Protocol (NCP) completes negotiation.

The routes of interest can be maintained on the ERX system in domain maps. The route information is conveyed to PPPoE through a user profile via AAA.

The PADN data can also be maintained on a RADIUS server. The PADN information is delivered to the ERX system as a VSA during the PPP authentication process.

Note: For information about domain mapping, see the ERX Broadband Access Configuration Guide, Chapter 1, Configuring Remote Access to the ERX System.

    aaa domain-map

• Use to map a domain name between a PPP client's domain name and a virtual router.
• Example

host1(config)#aaa domain-map xyz.com

host1(config-domain-map)#padn 10.2.25.6 255.255.255.0 10

host1(config-domain-map)#padn 20.2.0.0 255.255.0.0 11

• Use the no version to delete the map entry.

    padn

• Use to configure PADN parameters for a domain name.
• Example

host1(config-domain-map)#padn 10.2.25.6 255.255.255.255 13

• You may send up to a maximum of 16 PADNs per domain name.
• Use the no version to delete PADN parameters for the domain name.