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SCTP-PF: A Quick Failover Algorithm for the Stream Control Transmission Protocol (RFC7829) Disclosure Number: IPCOM000246709D
Original Publication Date: 2016-Apr-01
Included in the Prior Art Database: 2016-Jun-29
Document File: 46 page(s) / 54K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

Y. Nishida: AUTHOR [+5]


The Stream Control Transmission Protocol (SCTP) specified in [RFC4960] supports multihoming at the transport layer. SCTP's multihoming features include failure detection and failover procedures to provide network interface redundancy and improved end- to-end fault tolerance. In SCTP's current failure detection procedure, the sender must experience Path.Max.Retrans (PMR) number of consecutive failed timer-based retransmissions on a destination address before detecting a path failure. Until detecting the path failure, the sender continues to transmit data on the failed path. The prolonged time in which SCTP as described in [RFC4960] continues to use a failed path severely degrades the performance of the protocol. To address this problem, this document specifies a quick failover algorithm called "SCTP-PF" based on the introduction of a new Potentially Failed (PF) path state in SCTP path management. The

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Internet Engineering Task Force (IETF)                        Y. Nishida Request for Comments: 7829                            GE Global Research Category: Standards Track                                   P. Natarajan ISSN: 2070-1721                                            Cisco Systems                                                                  A. Caro                                                         BBN Technologies                                                                  P. Amer                                                   University of Delaware                                                               K. Nielsen                                                                 Ericsson                                                               April 2016

               SCTP-PF: A Quick Failover Algorithm for the                   Stream Control Transmission Protocol


   The Stream Control Transmission Protocol (SCTP) supports multihoming.    However, when the failover operation specified in RFC 4960 is    followed, there can be significant delay and performance degradation    in the data transfer path failover.  This document specifies a quick    failover algorithm and introduces the SCTP Potentially Failed    (SCTP-PF) destination state in SCTP Path Management.

   This document also specifies a dormant state operation of SCTP that    is required to be followed by an SCTP-PF implementation, but it may    equally well be applied by a standard SCTP implementation, as    described in RFC 4960.

   Additionally, this document introduces an alternative switchback    operation mode called "Primary Path Switchover" that will be    beneficial in certain situations.  This mode of operation applies to    both a standard SCTP implementation and an SCTP-PF implementation.

   The procedures defined in the document require only minimal    modifications to the specification in RFC 4960.  The procedures are    sender-side only and do not impact the SCTP receiver.

Nishida, et al.              Standards Track                    [Page 1]
 RFC 7829                         SCTP-PF                      April 2016

 Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the...