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> Mon, 15 February 2021 00:22 UTC

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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)
To: Ted Lemon <mellon@fugue.com>
Cc: IPv6 Operations <v6ops@ietf.org>, "6man@ietf.org" <6man@ietf.org>
References: <160989494094.6024.7402128068704112703@ietfa.amsl.com> <6fe3a45e-de65-9f88-808d-ea7e2abdcd16@si6networks.com> <F4E00812-E366-4520-AE17-7BB46E28D575@gmail.com> <CAN-Dau3iOjjU+FLpdtA7nqfKRX+sjjSanAU8U-O3pH-k5nSoig@mail.gmail.com> <a3fbfb94-90ae-961c-a2ab-33ade27e074e@si6networks.com> <5D1FBC37-1024-4300-AFA5-19F329E9F1D1@fugue.com> <CAN-Dau02FHbrWghcYXEGURFreT0JnY_QpVu2btpj94im3K30PQ@mail.gmail.com> <2DFE5AFF-82AF-4519-93AA-9E78D134AB68@fugue.com> <1213fb18-5e89-1f35-d095-6cc67b5f0102@si6networks.com> <776FA1FA-E0A7-4449-ACAA-ECA0E24D5465@fugue.com>
From: Fernando Gont <fgont@si6networks.com>
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Date: Sun, 14 Feb 2021 21:19:41 -0300
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On 13/2/21 17:45, Ted Lemon wrote:
> On Feb 13, 2021, at 3:15 PM, Fernando Gont <fgont@si6networks.com 
> <mailto:fgont@si6networks.com>> wrote:
>> Well, other addresses also share the same property -- they are valid, 
>> but they identify a different thing -- an interface in a different 
>> subnet.  e.g., address fe80::1 is valid on avery single network 
>> segment -- but the issue is that, en each of them, it most likely 
>> identifies a different thing. -- and that comes from the uniqueness 
>> property.
> 
> Yes, but a local address is never valid to forward, by definition. 

That's not correct. SIte-local were indeed forward-dable.

You're probably thinking about link-locals.
(Small detail aside: IIRC they seem to be actually forwardable if they 
are forwarded onto the same link (but not across links)).


-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492