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

Ted Lemon <mellon@fugue.com> Wed, 06 January 2021 17:06 UTC

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From: Ted Lemon <mellon@fugue.com>
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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)
Date: Wed, 6 Jan 2021 12:06:39 -0500
In-Reply-To: <20210106162652.GX13005@Space.Net>
Cc: Fernando Gont <fgont@si6networks.com>, IPv6 Operations <v6ops@ietf.org>, Philip Homburg <pch-ipv6-ietf-7@u-1.phicoh.com>, ipv6@ietf.org
To: Gert Doering <gert@space.net>
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On Jan 6, 2021, at 11:26 AM, Gert Doering <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.