Re: Last Call: <draft-ietf-6man-rfc4291bis-07.txt> (IP Version 6 Addressing Architecture) to Internet Standard

Mark Smith <markzzzsmith@gmail.com> Thu, 16 February 2017 09:54 UTC

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From: Mark Smith <markzzzsmith@gmail.com>
Date: Thu, 16 Feb 2017 20:53:58 +1100
Message-ID: <CAO42Z2xiS2NM+oKQCG8XwB3HFMMKoFOJBk1P=EpaabBbdggc1A@mail.gmail.com>
Subject: Re: Last Call: <draft-ietf-6man-rfc4291bis-07.txt> (IP Version 6 Addressing Architecture) to Internet Standard
To: Randy Bush <randy@psg.com>
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On 16 Feb. 2017 8:14 pm, "Randy Bush" <randy@psg.com> wrote:

> "something useful" makes it subjective.

some of us try to operate networks.  useful is what customers pay us to
do.

> SLAAC, NPT66, ILNP are the biggest one that I can think of.

slaac is real, used, and is useful in some environments that customers
want.


One of the benefits of a /64 is that IIDs within it can be sparsely
distributed, making device discovery by unsolicited inbound address probing
ineffective.

I think a router having these sorts of sparse IIDs in its addresses would
be a useful mitigation against router control plane attacks, such as a syn
attack on port 179 from the Internet.


Regards,
Mark.


> Trivial to make SLAAC work with variable length prefixes of course.

64 for slaac is fine.

for the rest, we went to cidr over a decade back, when folk scammed mo
out of 8+8.

randy

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