Re: [v6ops] A common problem with SLAAC in "renumbering" scenarios

[Brian E Carpenter <[e-mail]>]

On 2019-02-23 09:36, Jan Zorz - Go6 wrote:
> On 21/02/2019 22:14, Brian E Carpenter wrote:
>> Of course, SHOULD means "that there
>> may exist valid reasons in particular circumstances to ignore a
>> particular item, but the full implications must be understood and
>> carefully weighed...". In other words, do RFC8028 and Rule 5.5
>> unless there's a good reason not to.
> 
> Unfortunately not all vendors understand SHOULD in this way. 
> Implementing more options is expensive and lowers the profits, so it's 
> quite easy to fall into "implement all the MUSTS, declare compliancy 
> with RFCs and ship the product" trap.

Sure. I dealt with a lot of development managers during my years
at a 3-letter company, so this error in thinking is quite familiar
to me. But there is nothing the IETF can really do about that.

    Brian