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Re: IPv6 Routing & ND vs. Addressing, (Was: Re: <draft-ietf-6man-rfc4291bis-09.txt>)

Philip Homburg <pch-ipv6-ietf-4@u-1.phicoh.com> Thu, 13 July 2017 10:34 UTC

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Subject: Re: IPv6 Routing & ND vs. Addressing, (Was: Re: <draft-ietf-6man-rfc4291bis-09.txt>)
From: Philip Homburg <pch-ipv6-ietf-4@u-1.phicoh.com>
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In-reply-to: Your message of "Thu, 13 Jul 2017 01:51:53 +0000 ." <745583ab45bb407a9a210020a96773c5@XCH15-06-11.nw.nos.boeing.com>
Date: Thu, 13 Jul 2017 12:33:59 +0200
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>The problem is that over time, way more IP addresses become necessary, not just a
> few more. It's because so many more systems adopt IP, and become so much smarter
> than they used to be. So you need flexibility to expand, not just in number of c
>onnected devices, but also in the architecture of the network.

Using pseudo-random IIDs comes with the risk of collisions. So you have to waste
lots of bits to get that risk down to an acceptable level. It is a really bad
trade-off if your ability to expand the network comes at the price of increased
risk of collision.

However, since the mid 90s we have a protocol for dense allocation of addresses.
Where in the 64-bit IID space you can fit an entire universe.

So maybe stop trying to shoehorn the wrong protocol to your application and make
the right one work for you.

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