RE: [atn] [EXTERNAL] Embedding IP information in an IPv6 address (OMNI)

"Templin (US), Fred L" <> Sat, 17 October 2020 16:01 UTC

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From: "Templin (US), Fred L" <>
To: Bob Hinden <>, "Manfredi (US), Albert E" <>
CC: IPv6 List <>, =?iso-8859-1?Q?Ole_Tr=F8an?= <>, "" <>
Subject: RE: [atn] [EXTERNAL] Embedding IP information in an IPv6 address (OMNI)
Thread-Topic: [atn] [EXTERNAL] Embedding IP information in an IPv6 address (OMNI)
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Date: Sat, 17 Oct 2020 16:01:01 +0000
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Bob, it looks like our notes crossed at approximately the same time, but I would say
the same thing to you that I just said to Bert - we will want all four of LLAs (for the
control plane), SLAs (for the OAL) and ULAs/GUAs (for end-system addressing).

About your scale calculations, there will be far more terrestrial vehicles, urban
air mobility vehicles, drones, pedestrians etc. than there are the number of
aircraft currently worldwide. But, scale is just one dimension of the problem
space and the more important dimension is *function*.

Thanks - Fred

> -----Original Message-----
> From: atn [] On Behalf Of Bob Hinden
> Sent: Saturday, October 17, 2020 8:52 AM
> To: Manfredi (US), Albert E <>
> Cc: IPv6 List <>rg>; Ole Trøan <>rg>; Bob Hinden <>om>;
> Subject: Re: [atn] [EXTERNAL] Embedding IP information in an IPv6 address (OMNI)
> Bert,
> > On Oct 16, 2020, at 2:47 PM, Manfredi (US), Albert E <> wrote:
> >
> > From: ipv6 <> On Behalf Of Ole Troan
> >
> >> I would challenge you to make OMNI entirely free from semantic addresses. That would also help the working group understand
> what benefits semantic addresses bring to OMNI. And what the tradeoffs would be.
> >
> > I think it's a matter of speed and simplicity, no? You avoid that extra protocol, to assign addresses. Same idea as embedding the MAC
> into the IPv6 address. But it's true that the IETF likes to stay away from semantic addresses.
> >
> > The path of least resistance, from all the back and forth, as of now, seems to be to either use ULAs, or to request a new /10 for this
> new purpose.
> I did some searching, found that there are currently about 500K aircraft of all types (general aviation, commercial, military, etc.).
> Allocating a /10 seems excessive to me for this even with a lot of growth.
> Using ULAs would be fine.   This might even be a good justification to use the other half of the ULA space as I suspect the ICAO could
> be an allocation authority.
> Bob