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Good ${greeting_time}, Richard!

16 Jan 2022 11:35:42, you wrote to Tony Langdon:

 TL>> There are arguments for more than a /64 for residential use. That
 TL>> allows for different subnets with different security profiles, such
 TL>> as for IoT, the car, whatever other network of smart devices you
 TL>> want. For many, I suspect a /60 would be sufficient.
 RM> Sure ... I agree. My reply was more from the ISP point of view.
 RM> With 1 v6 subnet it is easy, you just announce the subnet.

No: when you need to provide the customer with IPv6, you assign one fixed
address for a link, and route a /64 subnet through that address.

Plastic routers (those sold for 20 EUR) deal with this setup just fine.

 RM> If you allow more, you need a way to configure them. (eg. VLANs,
 RM> different subnet on different LAN port, etc.)

Or simply route more /64 subnets through that address. Or /56 at once.

 RM> That is added complexity for a low cost product, where most of your
 RM> residential customers will have no clue what this is all about. So
 RM> it makes more sense to offer that on higher tier (and more expensive)
 RM> services.

That violates the KISS principle.


--
Alexey V. Vissarionov aka Gremlin from Kremlin
gremlin.ru!gremlin; +vii-cmiii-ccxxix-lxxix-xlii

... that's why I really dislike fools.
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