Re: draft-ietf-bfd-unaffiliated-echo WGLC and IPR check

[Jeffrey Haas <[e-mail]>]

Greg,


> On Apr 22, 2023, at 11:57 AM, Jeffrey Haas <[e-mail]> wrote:
>>   Device A performs its initial demultiplexing of a BFD Unaffiliated
>>   Echo session using the source IP address or UDP source port.
>> Am I missing something?
> 
> You are likely not paying sufficient attention to the "initial" word in this
> sentence.
> [...]

> Thus, as per RFC 5880, §6.3:
> :    The method of demultiplexing the initial packets (in which Your
> :    Discriminator is zero) is application dependent, and is thus outside
> :    the scope of this specification.
> 
> and the immediately preceding paragraph:
> 
> :    Once the remote end echoes back the local discriminator, all further
> :    received packets are demultiplexed based on the Your Discriminator
> :    field only (which means that, among other things, the source address
> :    field can change or the interface over which the packets are received
> :    can change, but the packets will still be associated with the proper
> :    session).
> 
> If you believe a reminder of this detail is appropriate in the document,
> consider sending text covering the point.  That said, I'd suggest delaying
> until the authors have integrated the prior comments, which also include
> more clearly labeling the contents of the packets in their text.

Note that the -07 version of the document incorporates additional text reinforcing that existing procedures will be used after initial demultiplexing.

Please see if you believe this addresses your concerns.

-- Jeff