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Re: [v6ops] I-D Action: draft-ietf-v6ops-ula-usage-recommendations-02.txt

Brian E Carpenter <brian.e.carpenter@gmail.com> Thu, 20 February 2014 20:03 UTC

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Date: Fri, 21 Feb 2014 09:03:09 +1300
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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To: Ray Hunter <v6ops@globis.net>
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-ula-usage-recommendations-02.txt
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On 20/02/2014 20:40, Ray Hunter wrote:
...
> At this point, I'd much rather merge or de-merge two sets of GUA space,
> and have predictable behaviour during any transition.

Ray, ULA prefixes *are* global unicast prefixes; their only special
characteristic is that they are not routed outside a given administrative
domain.

Also, it is common for large enterprises to run multiple disjoint prefixes
within the corporate network, and has been for many years.

I think the issues you're concerned about are all due to the fact that
in IPv6, it is bog standard to run more than one prefix on the same
phsyical subnet. The fact that one of them might be delegated from
a ULA /48 seems to me to be a side issue.

    Brian

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