Re: [v6ops] draft-lmhp-v6ops-transition-comparison-06

[JORDI PALET MARTINEZ <[e-mail]>]

    > So, the car can always contact the PC server. There is no
    > need for any transition mechanism in this scenario.

    But how the PC gets an IPv6 address through the Ethernet on the IoT 
    Router that connects on 4G?  The 4G only gives it a /64.  The IoT Router 
    does not implement clatd etc.

-> The 4G devices today, allow /64 prefix sharing, same they do for tethering. I agree that ideally, we should have DHCPv6-PD, and in some pilot scenarios, I've used it. We have talked about this many times. It is not blocked by "hardware" but may be by baseband modem firmware.


    > One example of this was, a few years ago, the contract awarded to
    > Telefónica for 53 millions of gas and electricity meters in UK, worth
    > 1.5 billion pounds in 15 years, using cellular and 6LOWPAN. If they
    > have done it with IPv4, they will have needed 34 million NATs,
    > according to their own calculations.

    The IoT devices that I acquire on the market dont do 6lowpan.  There are 
    indeed many 6lowpan devices but there are also many other IoT devices 
    that connect on 4G, have Bluetooth/WiFi/Ethernet/Galileo and yet dont do 
    6lowpan.

-> Those devices don't deserve the right to be called IoT then. A real IoT devices must have IPv6 support.

    > https://www.google.com/search?q=telefonica+awarded+uk+meters
    > 
    > Now, if you want to make it more complex, and you really need to keep
    > IPv4 incoming connections, you can still configure the NAT64 for
    > that, either for specific ports or addresses. However, as said, it
    > doesn't make sense to use IPv4 for new deployments of "anything".

    If I _have_ to do NAT, then NAT44 is largely sufficient.  There is no 
    need for v4-v6 transition mechanisms (I mean not in these trials I 
    consider).

-> It is utopic to believe that NAT44 will keep scaling ...





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