Point-to-Multipoint IP Interfaces (ipdn)

The point-to-multipoint IP interface for Solstice PPP is /dev/ipd. A single interface is used to create IP connections between one host and several others, as shown in Figure 1-5. The effect of using point-to-multipoint interfaces is to create a virtual subnetwork, which is usually assigned its own subnetwork number.

Figure 1-5 IP Point-to-Multipoint Configuration

A point-to-multipoint interface is defined by specifying a source address only. There are multiple possible destinations for the next hop, once an IP datagram has been passed to a point-to-multipoint interface. Therefore, each point-to-multipoint interface must be assigned a unique source address.

IP point-to-multipoint connections are only supported by asynchronous Solstice PPP links.