Re: Signaling Message Fragmentation

Hi Sri,

Sure, that diagram could be redrawn with airplanes instead of automobiles. But,
consider also the case where the airplane is a mobile router that connects into a
home network provided by an aeronautical Internet service provider. Then, the
passenger devices are also mobile routers with their own home networks. That
would represent a single mobile-router-within-mobile-router nesting, but a
"nested NEMO" case nonetheless.

We also care about use cases outside of just commercial aviation. Unmanned Air
Systems, Unmanned Underwater Vehicles, MANETs, disaster relief networks,
search and rescue networks, space-based systems etc.

About tunnels within tunnels, we should be able to nest them to infinite levels
of recursion where each level sees at least a 1500 MTU. None of this 1460
reduced to 1420 reduced to 1380, etc. until we run out of space - there should
be a solid 1500 at every level with the ability to go bigger if the path MTU can
support it.

Thanks - Fred

From: Sri Gundavelli (sgundave) [mailto:[email protected]]
Sent: Wednesday, September 24, 2014 3:26 PM
To: Templin, Fred L; [email protected]
Subject: Re: Signaling Message Fragmentation

Hi Fred,


> I can think of use cases related to my industry, for example when a first airplane provides an access link to a second airplane, the second airplane provides an access link to a third airplane, etc.

Seems to match the below use-case. I do not know the Boeing's or the broader Airline industry requirement, but personally I've not seen much interest for this.



[cid:[email protected]]



> In any case, however, whenever there is a fixed or mobile node connected to an access link provided by a mobility anchor there is nothing stopping the node from setting up a tunnel.

Agree. That's there today; A MR on cellular access link, brings up a tunnel, which is on a transport tunnel.

Regards
Sri




On 9/24/14 1:50 PM, "Templin, Fred L" <[email protected]<mailto:[email protected]>> wrote:

Hi Sri,

I remember the nested NEMO discussions, but at least for mobile network
use-cases I have not seen any real deployment use-cases for that
requirement. But, it will be good to have some discussions on that topic.

I am thinking about the case when a mobile router A provides an access
link for a mobile router B, which provides an access link for a mobile
router C, which provides an access link for a mobile router D, etc.
Each mobile router would coordinate with their home networks so that
there would be tunnels-within-tunnels-within-tunnels-etc.

I can think of use cases related to my industry, for example when a
first airplane provides an access link to a second airplane, the second
airplane provides an access link to a third airplane, etc. I think this
might come up also for certain mobile ad-hoc scenarios.

In any case, however, whenever there is a fixed or mobile node connected
to an access link provided by a mobility anchor there is nothing stopping
the node from setting up a tunnel. Then, there will be at least one
tunnel-within-tunnel nesting.

Thanks - Fred
[email protected]<mailto:[email protected]>

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