| 6501 | Conference Information Data Model for Centralized Conferencing (XCON)O. Novo, G. Camarillo, D. Morgan, J. Urpalainen | Proposed Standard | March 2012 |
| 6502 | Conference Event Package Data Format Extension for Centralized Conferencing (XCON)G. Camarillo, S. Srinivasan, R. Even, J. Urpalainen | Proposed Standard | March 2012 |
| 6503 | Centralized Conferencing Manipulation ProtocolM. Barnes, C. Boulton, S. Romano, H. Schulzrinne | Proposed Standard | March 2012 |
| 6504 | Centralized Conferencing Manipulation Protocol (CCMP) Call Flow ExamplesM. Barnes, L. Miniero, R. Presta, S P. Romano | Informational | March 2012 |
| 6505 | A Mixer Control Package for the Media Control Channel FrameworkS. McGlashan, T. Melanchuk, C. Boulton | Proposed Standard | March 2012 |
| 6506 | Supporting Authentication Trailer for OSPFv3M. Bhatia, V. Manral, A. Lindem · obsoleted by RFC 7166 | Proposed Standard | February 2012 |
| 6507 | Elliptic Curve-Based Certificateless Signatures for Identity-Based Encryption (ECCSI)M. Groves | Informational | February 2012 |
| 6508 | Sakai-Kasahara Key Encryption (SAKKE)M. Groves | Informational | February 2012 |
| 6509 | MIKEY-SAKKE: Sakai-Kasahara Key Encryption in Multimedia Internet KEYing (MIKEY)M. Groves | Informational | February 2012 |
| 6510 | Resource Reservation Protocol (RSVP) Message Formats for Label Switched Path (LSP) Attributes ObjectsL. Berger, G. Swallow | Proposed Standard | February 2012 |
| 6511 | Non-Penultimate Hop Popping Behavior and Out-of-Band Mapping for RSVP-TE Label Switched PathsZ. Ali, G. Swallow, R. Aggarwal | Proposed Standard | February 2012 |
| 6512 | Using Multipoint LDP When the Backbone Has No Route to the RootIJ. Wijnands, E. Rosen, M. Napierala, N. Leymann | Proposed Standard | February 2012 |
| 6513 | Multicast in MPLS/BGP IP VPNsE. Rosen, Ed., R. Aggarwal, Ed. | Proposed Standard | February 2012 |
| 6514 | BGP Encodings and Procedures for Multicast in MPLS/BGP IP VPNsR. Aggarwal, E. Rosen, T. Morin, Y. Rekhter | Proposed Standard | February 2012 |
| 6515 | IPv4 and IPv6 Infrastructure Addresses in BGP Updates for Multicast VPNR. Aggarwal, E. Rosen | Proposed Standard | February 2012 |
| 6516 | IPv6 Multicast VPN (MVPN) Support Using PIM Control Plane and Selective Provider Multicast Service Interface (S-PMSI) Join MessagesY. Cai, E. Rosen, Ed., I. Wijnands | Proposed Standard | February 2012 |
| 6517 | Mandatory Features in a Layer 3 Multicast BGP/MPLS VPN SolutionT. Morin, Ed., B. Niven-Jenkins, Ed., Y. Kamite, R. Zhang, N. Leymann, N. Bitar | Informational | February 2012 |
| 6518 | Keying and Authentication for Routing Protocols (KARP) Design GuidelinesG. Lebovitz, M. Bhatia | Informational | February 2012 |
| 6519 | RADIUS Extensions for Dual-Stack LiteR. Maglione, A. Durand | Proposed Standard | February 2012 |
| 6520 | Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS) Heartbeat ExtensionR. Seggelmann, M. Tuexen, M. Williams | Proposed Standard | February 2012 |
| 6521 | Home Agent-Assisted Route Optimization between Mobile IPv4 NetworksA. Makela, J. Korhonen | Experimental | March 2012 |
| 6522 | The Multipart/Report Media Type for the Reporting of Mail System Administrative MessagesM. Kucherawy, Ed. | Internet Standard | January 2012 |
| 6525 | Stream Control Transmission Protocol (SCTP) Stream ReconfigurationR. Stewart, M. Tuexen, P. Lei | Proposed Standard | March 2012 |
| 6526 | IP Flow Information Export (IPFIX) Per Stream Control Transmission Protocol (SCTP) StreamB. Claise, P. Aitken, A. Johnson, G. Muenz | Proposed Standard | March 2012 |
| 6527 | Definitions of Managed Objects for Virtual Router Redundancy Protocol Version 3 (VRRPv3)K. Tata | Proposed Standard | March 2012 |
| 6528 | Defending against Sequence Number AttacksF. Gont, S. Bellovin · obsoleted by RFC 9293 | Proposed Standard | February 2012 |
| 6529 | Host/Host Protocol for the ARPA NetworkA. McKenzie, S. Crocker | Historic | April 2012 |
| 6530 | Overview and Framework for Internationalized EmailJ. Klensin, Y. Ko | Proposed Standard | February 2012 |
| 6531 | SMTP Extension for Internationalized EmailJ. Yao, W. Mao | Proposed Standard | February 2012 |
| 6532 | Internationalized Email HeadersA. Yang, S. Steele, N. Freed | Proposed Standard | February 2012 |
| 6533 | Internationalized Delivery Status and Disposition NotificationsT. Hansen, Ed., C. Newman, A. Melnikov | Proposed Standard | February 2012 |
| 6534 | Loss Episode Metrics for IP Performance Metrics (IPPM)N. Duffield, A. Morton, J. Sommers | Proposed Standard | May 2012 |
| 6535 | Dual-Stack Hosts Using "Bump-in-the-Host" (BIH)B. Huang, H. Deng, T. Savolainen | Proposed Standard | February 2012 |
| 6536 | Network Configuration Protocol (NETCONF) Access Control ModelA. Bierman, M. Bjorklund · obsoleted by RFC 8341 | Proposed Standard | March 2012 |
| 6537 | Host Identity Protocol Distributed Hash Table InterfaceJ. Ahrenholz | Experimental | February 2012 |
| 6538 | The Host Identity Protocol (HIP) Experiment ReportT. Henderson, A. Gurtov | Informational | March 2012 |
| 6539 | IBAKE: Identity-Based Authenticated Key ExchangeV. Cakulev, G. Sundaram, I. Broustis | Informational | March 2012 |
| 6540 | IPv6 Support Required for All IP-Capable NodesW. George, C. Donley, C. Liljenstolpe, L. Howard | Best Current Practice | April 2012 |
| 6541 | DomainKeys Identified Mail (DKIM) Authorized Third-Party SignaturesM. Kucherawy | Experimental | February 2012 |
| 6542 | Kerberos Version 5 Generic Security Service Application Program Interface (GSS-API) Channel Binding Hash AgilityS. Emery | Proposed Standard | March 2012 |
| 6543 | Reserved IPv6 Interface Identifier for Proxy Mobile IPv6S. Gundavelli | Proposed Standard | May 2012 |
| 6544 | TCP Candidates with Interactive Connectivity Establishment (ICE)J. Rosenberg, A. Keranen, B. B. Lowekamp, A. B. Roach | Proposed Standard | March 2012 |
| 6545 | Real-time Inter-network Defense (RID)K. Moriarty | Proposed Standard | April 2012 |
| 6546 | Transport of Real-time Inter-network Defense (RID) Messages over HTTP/TLSB. Trammell | Proposed Standard | April 2012 |
| 6547 | RFC 3627 to Historic StatusW. George | Informational | February 2012 |
| 6548 | Independent Submission Editor ModelN. Brownlee, Ed., IAB · obsoleted by RFC 8730 | Informational | June 2012 |
| 6549 | OSPFv2 Multi-Instance ExtensionsA. Lindem, A. Roy, S. Mirtorabi | Proposed Standard | March 2012 |
| 6550 | RPL: IPv6 Routing Protocol for Low-Power and Lossy NetworksT. Winter, Ed., P. Thubert, Ed., A. Brandt, J. Hui, R. Kelsey, P. Levis, K. Pister, R. Struik, JP. Vasseur, R. Alexander | Proposed Standard | March 2012 |
| 6551 | Routing Metrics Used for Path Calculation in Low-Power and Lossy NetworksJP. Vasseur, Ed., M. Kim, Ed., K. Pister, N. Dejean, D. Barthel | Proposed Standard | March 2012 |
| 6552 | Objective Function Zero for the Routing Protocol for Low-Power and Lossy Networks (RPL)P. Thubert, Ed. | Proposed Standard | March 2012 |
| 6553 | The Routing Protocol for Low-Power and Lossy Networks (RPL) Option for Carrying RPL Information in Data-Plane DatagramsJ. Hui, JP. Vasseur | Proposed Standard | March 2012 |
| 6554 | An IPv6 Routing Header for Source Routes with the Routing Protocol for Low-Power and Lossy Networks (RPL)J. Hui, JP. Vasseur, D. Culler, V. Manral | Proposed Standard | March 2012 |
| 6555 | Happy Eyeballs: Success with Dual-Stack HostsD. Wing, A. Yourtchenko · obsoleted by RFC 8305 | Proposed Standard | April 2012 |
| 6556 | Testing Eyeball HappinessF. Baker | Informational | April 2012 |
| 6557 | Procedures for Maintaining the Time Zone DatabaseE. Lear, P. Eggert | Best Current Practice | February 2012 |
| 6558 | Sieve Extension for Converting Messages before DeliveryA. Melnikov, B. Leiba, K. Li | Proposed Standard | March 2012 |
| 6559 | A Reliable Transport Mechanism for PIMD. Farinacci, IJ. Wijnands, S. Venaas, M. Napierala | Experimental | March 2012 |
| 6560 | One-Time Password (OTP) Pre-AuthenticationG. Richards | Proposed Standard | April 2012 |
| 6561 | Recommendations for the Remediation of Bots in ISP NetworksJ. Livingood, N. Mody, M. O'Reirdan | Informational | March 2012 |
| 6562 | Guidelines for the Use of Variable Bit Rate Audio with Secure RTPC. Perkins, JM. Valin | Proposed Standard | March 2012 |
| 6563 | Moving A6 to Historic StatusS. Jiang, D. Conrad, B. Carpenter | Informational | March 2012 |
| 6564 | A Uniform Format for IPv6 Extension HeadersS. Krishnan, J. Woodyatt, E. Kline, J. Hoagland, M. Bhatia | Proposed Standard | April 2012 |
| 6565 | OSPFv3 as a Provider Edge to Customer Edge (PE-CE) Routing ProtocolP. Pillay-Esnault, P. Moyer, J. Doyle, E. Ertekin, M. Lundberg | Proposed Standard | June 2012 |
| 6566 | A Framework for the Control of Wavelength Switched Optical Networks (WSONs) with ImpairmentsY. Lee, Ed., G. Bernstein, Ed., D. Li, G. Martinelli | Informational | March 2012 |
| 6567 | Problem Statement and Requirements for Transporting User-to-User Call Control Information in SIPA. Johnston, L. Liess | Informational | April 2012 |
| 6568 | Design and Application Spaces for IPv6 over Low-Power Wireless Personal Area Networks (6LoWPANs)E. Kim, D. Kaspar, JP. Vasseur | Informational | April 2012 |
| 6569 | Guidelines for Development of an Audio Codec within the IETFJM. Valin, S. Borilin, K. Vos, C. Montgomery, R. Chen | Informational | March 2012 |
| 6570 | URI TemplateJ. Gregorio, R. Fielding, M. Hadley, M. Nottingham, D. Orchard | Proposed Standard | March 2012 |
| 6571 | Loop-Free Alternate (LFA) Applicability in Service Provider (SP) NetworksC. Filsfils, Ed., P. Francois, Ed., M. Shand, B. Decraene, J. Uttaro, N. Leymann, M. Horneffer | Informational | June 2012 |
| 6572 | RADIUS Support for Proxy Mobile IPv6F. Xia, B. Sarikaya, J. Korhonen, Ed., S. Gundavelli, D. Damic | Proposed Standard | June 2012 |
| 6573 | The Item and Collection Link RelationsM. Amundsen | Informational | April 2012 |
| 6574 | Report from the Smart Object WorkshopH. Tschofenig, J. Arkko | Informational | April 2012 |
| 6575 | Address Resolution Protocol (ARP) Mediation for IP Interworking of Layer 2 VPNsH. Shah, Ed., E. Rosen, Ed., G. Heron, Ed., V. Kompella, Ed. | Proposed Standard | June 2012 |
| 6576 | IP Performance Metrics (IPPM) Standard Advancement TestingR. Geib, Ed., A. Morton, R. Fardid, A. Steinmitz | Best Current Practice | March 2012 |
| 6577 | Authentication-Results Registration Update for Sender Policy Framework (SPF) ResultsM. Kucherawy · obsoleted by RFC 7001 | Proposed Standard | March 2012 |
| 6578 | Collection Synchronization for Web Distributed Authoring and Versioning (WebDAV)C. Daboo, A. Quillaud | Proposed Standard | March 2012 |
| 6579 | The 'disclosure' Link Relation TypeM. Yevstifeyev | Informational | March 2012 |
| 6580 | IANA Registries for the Remote Direct Data Placement (RDDP) ProtocolsM. Ko, D. Black | Proposed Standard | April 2012 |
| 6581 | Enhanced Remote Direct Memory Access (RDMA) Connection EstablishmentA. Kanevsky, Ed., C. Bestler, Ed., R. Sharp, S. Wise | Proposed Standard | April 2012 |
| 6582 | The NewReno Modification to TCP's Fast Recovery AlgorithmT. Henderson, S. Floyd, A. Gurtov, Y. Nishida | Proposed Standard | April 2012 |
| 6583 | Operational Neighbor Discovery ProblemsI. Gashinsky, J. Jaeggli, W. Kumari | Informational | March 2012 |
| 6584 | Simple Authentication Schemes for the Asynchronous Layered Coding (ALC) and NACK-Oriented Reliable Multicast (NORM) ProtocolsV. Roca | Proposed Standard | April 2012 |
| 6585 | Additional HTTP Status CodesM. Nottingham, R. Fielding | Proposed Standard | April 2012 |
| 6586 | Experiences from an IPv6-Only NetworkJ. Arkko, A. Keranen | Informational | April 2012 |
| 6587 | Transmission of Syslog Messages over TCPR. Gerhards, C. Lonvick | Historic | April 2012 |
| 6588 | A URN Namespace for ucodeC. Ishikawa | Informational | April 2012 |
| 6589 | Considerations for Transitioning Content to IPv6J. Livingood | Informational | April 2012 |
| 6590 | Redaction of Potentially Sensitive Data from Mail Abuse ReportsJ. Falk, Ed., M. Kucherawy, Ed. | Proposed Standard | April 2012 |
| 6591 | Authentication Failure Reporting Using the Abuse Reporting FormatH. Fontana | Proposed Standard | April 2012 |
| 6592 | The Null PacketC. Pignataro | Informational | 2 April 2012 |
| 6593 | Service Undiscovery Using Hide-and-Go-Seek for the Domain Pseudonym System (DPS)C. Pignataro, J. Clarke, G. Salgueiro | Experimental | 2 April 2012 |
| 6594 | Use of the SHA-256 Algorithm with RSA, Digital Signature Algorithm (DSA), and Elliptic Curve DSA (ECDSA) in SSHFP Resource RecordsO. Sury | Proposed Standard | April 2012 |
| 6595 | A Simple Authentication and Security Layer (SASL) and GSS-API Mechanism for the Security Assertion Markup Language (SAML)K. Wierenga, E. Lear, S. Josefsson | Proposed Standard | April 2012 |
| 6596 | The Canonical Link RelationM. Ohye, J. Kupke | Informational | April 2012 |
| 6597 | RTP Payload Format for Society of Motion Picture and Television Engineers (SMPTE) ST 336 Encoded DataJ. Downs, Ed., J. Arbeiter, Ed. | Proposed Standard | April 2012 |
| 6598 | IANA-Reserved IPv4 Prefix for Shared Address SpaceJ. Weil, V. Kuarsingh, C. Donley, C. Liljenstolpe, M. Azinger | Best Current Practice | April 2012 |