I approve the following assignment in the BFD Authentication Types registry:
NULL Auth Type: 6 I have the following non-blocking comment on the draft. Unlike other authentication types, the NULL Auth Type introduced by this draft does not include any authentication key. This could lead a naïve implementor to believe that it would be acceptable to enable this only in one direction (since no actual authentication check is performed). However, this would be in violation of the rules defined in https://datatracker.ietf.org/doc/html/rfc5880#section-6.8.6 - specifically: <snip> If the A bit is set and no authentication is in use (bfd.AuthType is zero), the packet MUST be discarded. If the A bit is clear and authentication is in use (bfd.AuthType is nonzero), the packet MUST be discarded. <end snip> An implementation which allowed one way enablement of NULL Authentication would therefore not be backwards compatible and could cause BFD sessions to fail or not come up at all. I would suggest that this be pointed out in the draft as an "operational consideration". Les > -----Original Message----- > From: David Dong via RT <[email protected]> > Sent: Wednesday, August 20, 2025 12:13 PM > Cc: [email protected]; [email protected]; Les Ginsberg (ginsberg) > <[email protected]>; [email protected] > Subject: [IANA #1426750] expert review for draft-ietf-bfd-stability (bfd- > parameters) > > Dear Dave Katz, Jeff Haas, Les Ginsberg (cc: bfd WG), > > Sending this review request to you as the backup experts for the BFD > Authentication Types registry; can you review the proposed registration in > draft-ietf-bfd-stability-19 for us? Please see: > > https://datatracker.ietf.org/doc/draft-ietf-bfd-stability/ > > The due date is September 3rd. > > If this is OK, when the IESG approves the document for publication, we'll make > the registration at: > > https://www.iana.org/assignments/bfd-parameters/ > > Unless you ask us to wait for the other reviewers, we’ll act on the first > response we receive. > > With thanks, > > David Dong > IANA Services Sr. Specialist > > On Wed Aug 20 18:27:29 2025, david.dong wrote: > > Dear Dave Ward (cc: bfd WG), > > > > Following up on this; as the designated expert for the BFD > > Authentication Types registry, can you review the proposed > > registration in draft-ietf-bfd-stability-19 for us? Please see: > > > > https://datatracker.ietf.org/doc/draft-ietf-bfd-stability/ > > > > The due date was August 19th. > > > > If this is OK, when the IESG approves the document for publication, > > we'll make the registration at: > > > > https://www.iana.org/assignments/bfd-parameters/ > > > > With thanks, > > > > David Dong > > IANA Services Sr. Specialist > > > > On Thu Aug 14 01:10:26 2025, david.dong wrote: > > > Dear Dave Ward (cc: bfd WG), > > > > > > Following up on this; as the designated expert for the BFD > > > Authentication Types registry, can you review the proposed > > > registration in draft-ietf-bfd-stability-19 for us? Please see: > > > > > > https://datatracker.ietf.org/doc/draft-ietf-bfd-stability/ > > > > > > The due date is August 19th. > > > > > > If this is OK, when the IESG approves the document for publication, > > > we'll make the registration at: > > > > > > https://www.iana.org/assignments/bfd-parameters/ > > > > > > With thanks, > > > > > > David Dong > > > IANA Services Sr. Specialist > > > > > > On Tue Aug 05 19:41:52 2025, david.dong wrote: > > > > Dear Dave Ward (cc: bfd WG), > > > > > > > > As the designated expert for the BFD Authentication Types registry, > > > > can you review the proposed registration in draft-ietf-bfd- > > > > stability- > > > > 19 for us? Please see: > > > > > > > > https://datatracker.ietf.org/doc/draft-ietf-bfd-stability/ > > > > > > > > The due date is August 19th. > > > > > > > > If this is OK, when the IESG approves the document for publication, > > > > we'll make the registration at: > > > > > > > > https://www.iana.org/assignments/bfd-parameters/ > > > > > > > > With thanks, > > > > > > > > David Dong > > > > IANA Services Sr. Specialist
