4 ms·
> Even as a tech enthusiast filling that would be some work Have you ever used VMs on a laptop? How many virtual networks do you need? Only one? With only one
by 4ad 8y ago
> Even as a tech enthusiast filling that would be some work
Have you ever used VMs on a laptop? How many virtual networks do you need? Only one? With only one you only need one extra bit bit for routing, so you could give a /63 instead of a /64 to your laptop, except that IPv6 allocation is supposed to be done in nibbles (and you need to overprovison anyway, what if tomorrow you need two networks?), so the next logical step is a /60, which means your ISP should give you at least a /56. Personally, I use much more than one virtual network on my laptops, so I would need a /60 anyway (if I want to keep all the nice properties of IPv6, that is).
As long as you want to keep everything nice with IPv6, the block you need is /64-(4*n), where n is the level of routing you plan to do.
> unless you insist I use a /64 for point-to-point links.
Each p2p link on IPv6 uses a /64 (even though it's only assigned an /127).
> How does a household with 3 people need 14 subnets?
In the IoT era (where S stands for security), if you don't put each IoT device in its own VLAN, you are in for a surprise.
- detaro 8y ago> Have you ever used VMs on a laptop? How many virtual networks do you need? Very few, to the point of "if it's more than one, the other ones aren't intended be reachable and thus don't need public space". > Each p2p link on IPv6 uses a /64 (even though it's only assigned an /127). No, it doesn't, since my routers don't need to do SLAAC between each other, but can happily live with static IPs. > In the IoT era (where S stands for security), if you don't put each IoT device in its own VLAN, you are in for a surprise. Never felt the need to put each device in it's own subnet, sensible firewalling seems enough. I tend to avoid devices that really want to talk to the internet though, so most of the time it's "you don't get to talk to the internet"-subnet. But ok, if you love connected stuff and want to split it in very fine ways, that'd be a bunch of subnets. So yes, as I said /56 would be nice and should be the default but /60 is likely to be enough for the vast majority of users.
- deleted 8y ago[deleted]