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<div class="moz-cite-prefix">On 9/13/21 2:52 PM, Baldur Norddahl
wrote:<br>
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cite="mid:CAPkb-7C1shOugMojaLHeFyzN0eigV5hUhU3mAcLE8HsdBPz59w@mail.gmail.com">
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<div dir="ltr" class="gmail_attr">On Mon, Sep 13, 2021 at 8:22
PM Randy Bush <<a href="mailto:randy@psg.com"
moz-do-not-send="true">randy@psg.com</a>> wrote:<br>
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<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">real compatibility with
ipv4 was disdained. the transition plan was<br>
dual stack and v4 would go away in a handful of years. the
93<br>
transition mechanisms were desperate add-ons when v4 did not
go away.<br>
and dual stack does not scale, as it requires v4 space
proportional to<br>
deployed v6 space.<br>
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<div>What I find most peculiar about this whole rant (not just
yours but the whole thread) is that I may be the only one
who found implementing IPv6 with dual stack completely
trivial and a non issue? There is no scale issue nor any of
the other rubbish. <br>
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<p>I agree on the host side. It didn't even occur to me at the time
I was looking at it that it would be any sort of issue -- we had
all kinds of other protocols on our boxes like SMB, Netware, DEC
LAT, etc. We would have done it if customers told us they wanted
it, just like we implemented ACL's not realizing why they were
especially important. Back in the early days all routing was done
in software so it wouldn't have been hard to squeeze v6 in. All of
that changed when the forwarding plane got cast in silicon though
which made it far, far more difficult to get anybody to stick
their necks out vs a skunk works software project. But before that
it would have been completely doable if somebody was willing to
throw money at it.<br>
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Mike<br>
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