http://www.rfc-editor.org/rfc/rfc1209.txt
RFC 1209: The Transmission of IP Datagrams over the SMDS Service, D. Piscitello, J. Lawrence1991-03-01T23:00:00-00:00This memo defines a protocol for the transmission of IP and ARP packets over a Switched Multi-megabit Data Service Network configured as a logical IP subnetwork. [STANDARDS-TRACK]