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Re: ipv6 maybe has arrived.



On Tue, Feb 14, 2023 at 03:07:08PM -0500, Michael Stone wrote:
> On Fri, Feb 10, 2023 at 02:33:12PM +0000, Tim Woodall wrote:
> > On Fri, 10 Feb 2023, jeremy ardley wrote:
> > > you can ping them as in
> > > 
> > > ping fe80::87d:c6ff:fea4:a6fc
> > > 
> > 
> > ooh, I didn't know that worked.
> > 
> > Same as
> > ping fe80::87d:c6ff:fea4:a6fc%eth0
> > 
> > on my machines at least. No idea how it picks the interface when there's
> > more than one.
> > 
> > The interface seems mandatory for ssh for me:
> > 
> > tim@einstein(4):~ (none)$ ssh fe80::1
> > ssh: connect to host fe80::1 port 22: Invalid argument
> > tim@einstein(4):~ (none)$
> 
> You actually have an fe80::1 IP address on your system? That would be highly
> unusual. If you don't, why would you expect it to respond?

Whether it responds or not is, I think, irrelevant here. The thing
gets cut short by the -EINVAL, which stems from the missing interface
specification (well, "zone index" in IPv6 jargon). Without zone index,
an IPv6LL is (may be?) underspecified. So it would be fe80::1%eth0
or something similar.

Cheers

[1] https://en.wikipedia.org/wiki/IPv6_address#zone_index
-- 
t

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