https://app.knowbase.one/vault/rfc/docid/6064
RFC5571: Softwire Hub and Spoke Deployment Framework with Layer Two Tunneling Protocol Version 2 (L2TPv2)
Network Working Group B. Storer Request for Comments: 5571 C. Pignataro, Ed. Category: Standards Track M. Dos Santos Cisco Systems ...
https://app.knowbase.one/vault/rfc/docid/6131
RFC5619: Softwire Security Analysis and Requirements
Network Working Group S. Yamamoto Request for Comments: 5619 NICT/KDDI R&D Labs Category: Standards Track C. Williams H. Yokota ...