Re: Is 00:00:00:00:00:00 special?

I think maybe this line 
https://nxr.netbsd.org/xref/src/sys/netinet6/in6_ifattach.c#228


On 20/11/2025 16:59, Mouse wrote:
> Is the all-zero MAC address special?  Thanks to an unusual hardware
> situation, I just booted a SPARC such that le0 thinks its MAC is
> all-0-bits.  (Booted from disk, not netboot, to be sure.)
>
> But IPv6 failed to attach at boot time, saying it failed to get EUI64,
> which is why I'm asking.  I can't recall hearing of any way in which
> the all-0 MAC would be invalid, but _something_ seems to think it is;
> it looks to me like a perfectly good globally-administered unicast
> address.  It seems to work fine for IPv4, though of course (like any
> MAC) there can be at most one such in any broadcast domain unless
> you're doing something fancy.
>
> Anybody happen to know?
>
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