Re: IPv6 and 7th bit - why

RFC 2373:

"The motivation for inverting the "u" bit when forming the interface
identifier is to make it easy for system administrators to hand
configure local scope identifiers when hardware tokens are not
available. This is expected to be case for serial links, tunnel
end-points, etc. The alternative would have been for these to be of
the form 0200:0:0:1, 0200:0:0:2, etc., instead of the much simpler
::1, ::2, etc."

On Thu, May 6, 2010 at 12:09 PM, Jack Router <pan.router_at_gmail.com> wrote:
> Why the 7th bit of first octet is swapped when using MAC address for IPV6
> address ?
> Just cannot find any explanation as why ipv6 was implemented that way ...
>
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