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Re: KDE and IPv6



On Tuesday 08 November 2005 15:07, Curt Howland wrote:
> On Monday 07 November 2005 21:01, Nate Bargmann was heard to say:
> > Well, ipv6calc shows me:
> >
> > ipv6calc --ipv4_to_6to4addr 192.168.1.20
> > 2002:c0a8:114::
> >
> > Not that I understand IPV4 to IPV6 conversion or anything, but I'm
> > not sure if the 2002 at the head of the output is significant or
> > the double colons at the tail.
>
> I think it's a literal conversion, one bit pattern mapped onto the
> other.
>
> The "compatibility" address is "::192.168.1.20", but I have yet to
> find out what the "compatibility" mode gains. There doesn't seem to
> be any automatic address/header remapping going on, so maybe it
> exists so that v4 to v6 gateways could be easily defined.
>
> I settled on fef::192:168:1:20 because "fef:" is private address
> space, just like 10.x.x.x and 192.168.x.x in v4, and until someone
> tells me what compatibility mode is good for, might as well go
> straight to it.

I think compatability mode also works for non-private addresses, i.e. should 
be routed outside the local network if possible.

> The adjacent colons are shorthand for "all zeros, move along, nothing
> to see here". Purely for human consumption, and it does make 128 bits
> easier in human communications. But yeah, it's that committee thing.
> More features.

I think there is a restriction that only one colon pair is allowed

Cheers,
Kevin

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