Re: [Int-dir] Intdir early review of draft-ietf-ipwave-ipv6-over-80211ocb-34 - 'conforming IPv6' - fe80::/10 vs fe80::/64

[Alexandre Petrescu <[e-mail]>]

Le 11/04/2019 à 17:21, 神明達哉 a écrit :
> At Thu, 11 Apr 2019 13:26:59 +0200,
> Alexandre Petrescu <[e-mail] 
> <mailto:[e-mail]>> wrote:
> 
>  > Others reported openbsd to work ok with Interface ID of length different
>  > than 64.  Because of that report, I believe openbsd will also work ok
>  > with fe80:1::1/32.
> 
> I guess you mean this thread:
> https://mailarchive.ietf.org/arch/msg/ipv6/2dnG1_yJON6zpGKz7YRWgI55iMc
> 
> It's a big logical leap to conclude that fe80:1::1(/32) can be used as
> a link-local address from that discussion.  First, it's quite clear
> that it's largely about generating global addresses.  In fact, the
> implementor actually clarified that "/64" is used for link-local
> addresses:
> https://mailarchive.ietf.org/arch/msg/ipv6/WetxgYx-kJ1p4xUZbFxf6BikEks
> 
> Secondly, even if this could be interpreted as if this implementation
> allows 96-bit IIDs for link-local addresses, that doesn't mean it can
> use a non-0 bit in the (now 22-bit) intermediate field.  At best it
> can only mean "fe80:1::1/10" (using a 118-bit interface ID) would be
> allowed.
> 
> I'd strongly suggest when you say something like this:
> 
>  > - using fe80::/10 on Cisco, linux and openbsd works ok.
> 
> you confirm it literally "works" by running it by yourself, rather
> than just deducing a conclusion from someone else's word in a
> different topic in your favor.  Otherwise your other assertions will
> look similarly implausible.
> 
> Anyway, as ipv6-over-80211ocb now seems to be removing the possibly
> misleading text of "fe80::/10" intending to allow a non-0 value in the
> intermediate 54 bits of link-local addresses, I have no more comment
> on this in this thread.  I'll stop here.

I agree with the comments on your email.  NExt time I talk about 
implementations I do, not deduced from others' tests.

The text now indeed removes fe80::/10.

Alex
> 
> --
> JINMEI, Tatuya