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> It'd be nice if they gave out a proper prefix delegation. Instead the best I can get allocated is a /60. Pretty sure the RFC recommends /48's to be allocated
by agwa 13y ago
> It'd be nice if they gave out a proper prefix delegation. Instead the best I can get allocated is a /60. Pretty sure the RFC recommends /48's to be allocated to customers.
Out of curiosity, what's your use case for more than 16 subnets? I agree on principle they should give you a /48 if you ask for it, but the truth is that I'm extremely grateful they rethought their original stance, which was that a measly /64 was enough for anyone! That would have been extremely harmful and short-sighted; I feel pretty comfortable with a /60.
On that note, does anyone know what Time Warner's maximum prefix delegation size is?
- oofabz 13y agoI have been perfectly happy with my /64 for many years. I can't imagine needing multiple subnets for home or small office use.
- agwa 13y agoI think the most compelling use case is a separate guest network (which is firewalled from your normal network; some wireless access points tout this as a feature). Power users might also run a VPN and allocate a subnet to VPN clients. There are also home automation standards that put all your devices on a separate subnet.
- 2bluesc 13y agoI think the single most compelling use case is to segment WiFi and Ethernet traffic. No point in broadcasting useless Ethernet ARPs to the WiFi network when bridged for example.
- simcop2387 13y agoI can see use for maybe about 4, not sure about more, but if I recall correctly the privacy extensions require a /48 don't they?
- agwa 13y agoNo, the privacy extensions simply use a random interface ID instead of deriving it from the MAC address. You still use a single /64 subnet as usual. (Unless there is an aspect of the privacy extensions I'm not familiar with, but this is what people usually mean when they say "privacy extensions.")
- zaphoyd 13y agoAs far as I know the privacy extensions only cycle through the host portion of the address (lower 64 bits) so they should work fine with just a /64. Access to a bigger prefix may help you get around systems that do IP banning in /64 chunks though.
- 2bluesc 13y agoI have several subnets (WiFi, LAN, virtual machines, guest WiFi, etc). I don't just bridge WiFi and LAN together like most, I prefer more control. I'll fine with 16 subnets today, but I don't know what'll change in the future. I'm sure I'll have use cases for more.