| 1701 | Generic Routing Encapsulation (GRE)S. Hanks, T. Li, D. Farinacci, P. Traina | Informational | October 1994 |
| 1702 | Generic Routing Encapsulation over IPv4 networksS. Hanks, T. Li, D. Farinacci, P. Traina | Informational | October 1994 |
| 1853 | IP in IP TunnelingW. Simpson | Informational | October 1995 |
| 2003 | IP Encapsulation within IPC. Perkins | Proposed Standard | October 1996 |
| 2004 | Minimal Encapsulation within IPC. Perkins | Proposed Standard | October 1996 |
| 2113 | IP Router Alert OptionD. Katz | Proposed Standard | February 1997 |
| 2205 | Resource ReSerVation Protocol (RSVP) -- Version 1 Functional SpecificationR. Braden, Ed., L. Zhang, S. Berson, S. Herzog, S. Jamin | Proposed Standard | September 1997 |
| 2473 | Generic Packet Tunneling in IPv6 SpecificationA. Conta, S. Deering | Proposed Standard | December 1998 |
| 2711 | IPv6 Router Alert OptionC. Partridge, A. Jackson | Proposed Standard | October 1999 |
| 2746 | RSVP Operation Over IP TunnelsA. Terzis, J. Krawczyk, J. Wroclawski, L. Zhang | Proposed Standard | January 2000 |
| 2784 | Generic Routing Encapsulation (GRE)D. Farinacci, T. Li, S. Hanks, D. Meyer, P. Traina | Proposed Standard | March 2000 |
| 3697 | IPv6 Flow Label SpecificationJ. Rajahalme, A. Conta, B. Carpenter, S. Deering · obsoleted by RFC 6437 | Proposed Standard | March 2004 |
| 4080 | Next Steps in Signaling (NSIS): FrameworkR. Hancock, G. Karagiannis, J. Loughney, S. Van den Bosch | Informational | June 2005 |
| 4081 | Security Threats for Next Steps in Signaling (NSIS)H. Tschofenig, D. Kroeselberg | Informational | June 2005 |
| 4213 | Basic Transition Mechanisms for IPv6 Hosts and RoutersE. Nordmark, R. Gilligan | Proposed Standard | October 2005 |
| 4301 | Security Architecture for the Internet ProtocolS. Kent, K. Seo | Proposed Standard | December 2005 |
| 4302 | IP Authentication HeaderS. Kent | Proposed Standard | December 2005 |
| 4303 | IP Encapsulating Security Payload (ESP)S. Kent | Proposed Standard | December 2005 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 5944 | IP Mobility Support for IPv4, RevisedC. Perkins, Ed. | Proposed Standard | November 2010 |
| 5971 | GIST: General Internet Signalling TransportH. Schulzrinne, R. Hancock | Experimental | October 2010 |
| 5974 | NSIS Signaling Layer Protocol (NSLP) for Quality-of-Service SignalingJ. Manner, G. Karagiannis, A. McDonald | Experimental | October 2010 |