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Re: Generic anycast addresses...

Bob Hinden <bob.hinden@gmail.com> Thu, 30 May 2019 00:48 UTC

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Subject: Re: Generic anycast addresses...
From: Bob Hinden <bob.hinden@gmail.com>
In-Reply-To: <7A9560FC-0393-45DF-8389-B868455AC6DD@fugue.com>
Date: Wed, 29 May 2019 17:48:19 -0700
Cc: Bob Hinden <bob.hinden@gmail.com>, "6man@ietf.org" <6man@ietf.org>, Dave Thaler <dthaler@microsoft.com>
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To: Ted Lemon <mellon@fugue.com>
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Ted,

> On May 29, 2019, at 5:41 PM, Ted Lemon <mellon@fugue.com> wrote:
> 
> Indeed, the propagation pattern of a ULA would work nicely for this, but there’s no way to do this automatically.   I might have (and indeed unfortunately it’s common to have) more than one ULA on a constrained network.   How do I pick?   :)
> 
> So what I really want is indeed something that is treated like a ULA, but that can be a constant, and not something that has to be derived.

We when ULAs were being developed, there was a notion of centrally assigned ULAs.  It’s not currently defined, but that’s was the original intent for having the “L” bit in the prefix.  See RFC4193.

Bob

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