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Re: [v6ops] Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)

Fernando Gont <fgont@si6networks.com> Wed, 06 January 2021 17:29 UTC

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To: Ted Lemon <mellon@fugue.com>, Gert Doering <gert@space.net>
Cc: IPv6 Operations <v6ops@ietf.org>, Philip Homburg <pch-ipv6-ietf-7@u-1.phicoh.com>, ipv6@ietf.org
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From: Fernando Gont <fgont@si6networks.com>
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Date: Wed, 06 Jan 2021 14:26:56 -0300
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Subject: Re: [v6ops] Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)
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On 6/1/21 14:06, Ted Lemon wrote:
> On Jan 6, 2021, at 11:26 AM, Gert Doering <gert@space.net 
> <mailto:gert@space.net>> wrote:
>> or rename the scopes to be 0 (link-local), 5 (mid-range), 10 (global)…
> 
> This implies concentric circles, which isn’t really valid. Different 
> ULAs can have disjoint or overlapping applicability. I agree with a 
> previous comment that talking about this in terms of scope doesn’t make 
> much sense. I don’t know how to write code that takes into account the 
> difference in scope between ULA and GUA, other than perhaps in routing 
> protocols.

e.g., for thinks like mDNS, you'd only bind() and listen on your ULAs, 
if any.


-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
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