ppp — point to point protocol network interface
The ppp interface allows serial lines to be used as network interfaces using the point-to-point protocol. The ppp interface can use various types of compression and has many features over the sl(4) protocol.
ppp%d: af%d not supported. The interface was handed a message with addresses formatted in an unsuitable address family; the packet was dropped.
Currently, only the ip(4) protocol is supported.
BSD August 10, 1996 BSD