[RRG] Re: Billions of micronets / EID prefixes

[Brian E Carpenter <brian.e.carpenter@gmail.com>]

On 2008-09-22 19:35, Robin Whittle wrote:
> I agree with David Conrad, (Re: Fast and sparse mapping?) responding
> to Brian Carpenter:
> 
>>> I don't think we need to design for a world where most domestic
>>> subscribers are multihomed, or care in the least if they get a
>>> new IP address each time they connect.
> 
>> I would classify this as a failure of imagination. If RRG is
>> indeed aiming at 10 to 20 years in the future, I would be quite
>> astonished if an underlying assumption is that the way the
>> Internet is today is the way it will be one to two decades in the
>> future, just bigger.
>>
>> My assumption is that as people become more and more dependent on
>> Internet connectivity for their day-to-day lives, the less
>> interested they will be in periodic outages.  When the myriad
>> devices in your house depend on being connected to the Internet
>> and you have a wide variety of layer 2 technologies over which to
>> connect (e.g., WiMax, FTTH, Cable, DSL, and their successors), I
>> fully expect most domestic subscribers to be multihomed.
>> Actually, I expect it to be worse than that -- I can very easily
>> imagine multi-homed PANs connected to multiple providers via
>> cell phone-as-router-equivalents.
>>
>> As such, in my opinion, a design that does not anticipate (or at
>> least cannot scale with) massive multihoming would be a waste of
>> time.
> 
> The most obvious mass-scale use of what I call "Scalable PI" (SPI)
> space would be a separate EID prefix (LISP) or micronet (Ivip) for
> each handheld device - with every person on the planet having one of
> these things, currently known as "cell-phones".
> 
> That would be a very large number of micronets - such as 10 billion.
>  However, the rate of mapping updates is not necessarily
> extraordinarily high, since generally a mapping update will only be
> required if the device moves more than 1000km or so.  This is the
> "TTR" (Translating Tunnel Router) approach to mobility:
> 
>   http://www.firstpr.com.au/ip/ivip/TTR-Mobility.pdf

It's my opinion that it would be a fundamental engineering error
to mix this problem (scale 10 billion) with the problem of
multihoming medium and large sites (scale 10 million).

     Brian

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