This describes a standards-track procedure for SCTP to support of failover when working with a multi-homed SCTP end-point:
SCTP supports multi-homing. However, when the failover operation
specified in RFC4960 is followed, there can be significant delay and
performance degradation in the data transfer path failover. To
overcome this problem this document specifies a quick failover
algorithm (SCTP-PF) based on the introduction of a Potentially Failed
(PF) state in SCTP Path Management.
The document also specifies a dormant state operation of SCTP. This
dormant state operation is required to be followed by an SCTP-PF
implementation, but it may equally well be applied by a standard
RFC4960 SCTP implementation.
Additionally, the 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 RFC4960 SCTP implementation as well as to a SCTP-PF
The procedures defined in the document require only minimal
modifications to the RFC4960 specification. The procedures are
sender-side only and do not impact the SCTP receiver.
Working Group Summary
Nothing out of the ordinary happened during work on this draft.
Gorry Fairhurst performed an extensive review of -05 version.
The working group requested a change of intended status (from Experimental
to Proposed Standard) during document development, and this was approved.
Gorry Fairhurst is the document shepherd.
Spencer Dawkins is the responsible AD.