https://app.knowbase.one/vault/rfc/docid/2747
RFC2472: IP Version 6 over PPP
Network Working Group D. Haskin Request for Comments: 2472 E. Allen Obsoletes: 2023 Bay Networks, Inc. Category: Standards Track December 1998 ...
https://app.knowbase.one/vault/rfc/docid/5534
RFC5072: IP Version 6 over PPP
Network Working Group S. Varada, Ed. Request for Comments: 5072 Transwitch Obsoletes: 2472 D. Haskins Category: Standards Track E. Allen ...