4 ms·
IPv6 networks, by specification, are (almost) always /64 - that is, your subnetwork can have 2^64 nodes on it - which means that any EUI-64 device (A device wit
by ghshephard 5y ago
IPv6 networks, by specification, are (almost) always /64 - that is, your subnetwork can have 2^64 nodes on it - which means that any EUI-64 device (A device with a 64 Bit MAC address - Ethernet Devices with 48 bits commonly extend to 64 bits by stuffing 16 bits (FF:FE) in the middle) can automatically determine its own IPv6 address by just concatenating the Network + MAC address. No Stateful DHCP server required.
I'm more curious as to why the /80. This is the very first time I've seen anything less than a /64. Without digging into the details, I'm guessing(?) that the network is a /64 (almost certainly), and on that network there can be /16 nodes (65536), each of which can have /48 (300 Trillion) vhosts.
And I thought I had left CIDR behind with IPv4... Sigh.