I do not believe the errata in question is necessary. Section 6.8.4 covers the calculation of the detection interval. After the start of a poll, the remote system may take some time to respond to the poll and set the Final bit. During that time, it is permissable to send Async packets following the packet reception rules - including authentication - without setting the Final bit.
The text recommended by this proposed errata constrains this time to the completion of a Poll within the originally negotiated detection interval. While this may happen, it is not required. -- Jeff (speaking as an individual contributor) On Tue, Feb 16, 2016 at 12:26:08PM -0800, RFC Errata System wrote: > The following errata report has been held for document update > for RFC5880, "Bidirectional Forwarding Detection (BFD)". > > -------------------------------------- > You may review the report below and at: > http://www.rfc-editor.org/errata_search.php?rfc=5880&eid=4410 > > -------------------------------------- > Status: Held for Document Update > Type: Editorial > > Reported by: Liu Lin <[email protected]> > Date Reported: 2015-07-07 > Held by: Alvaro Retana (IESG) > > Section: 6.8.4 > > Original Text > ------------- > If Demand mode is active, and a period of time equal to the Detection > Time passes after the initiation of a Poll Sequence (the transmission > of the first BFD Control packet with the Poll bit set), the session > has gone down > > Corrected Text > -------------- > If Demand mode is active, and a period of time equal to the Detection > Time passes after the initiation of a Poll Sequence (the transmission > of the first BFD Control packet with the Poll bit set),and without > receiving a BFD Control packet with the Final (F) bit set from the > remote system, the session has gone down > > Notes > ----- > If has received BFD Control packet with the Final (F) bit set from the > remote system, the session will not gone down > > -------------------------------------- > RFC5880 (draft-ietf-bfd-base-11) > -------------------------------------- > Title : Bidirectional Forwarding Detection (BFD) > Publication Date : June 2010 > Author(s) : D. Katz, D. Ward > Category : PROPOSED STANDARD > Source : Bidirectional Forwarding Detection > Area : Routing > Stream : IETF > Verifying Party : IESG
