Nortel Networks Multi-link Multi-node PPP Bundle Discovery Protocol

Many dial-in hosts which support multi-link PPP dial the same phone number for all links. This implies that there exists a rotary at the Point Of Presence (POP) which routes incoming calls to a bank of modems. These may be physically independent modems connected to Remote Access Server (RAS) and a rotary of analog phone lines, or a RAS with internal modems connected to analog lines or a T1/E1 or T3/E3 channel. In any case, a given RAS can only handle just so many simultaneous connections. A typical POP may need to support hundreds of connections, but no RAS today can handle that many. This creates a problem when a user’s primary PPP connection is established to one