Re: Anybody Using IPv6?

Den 2025-05-16 kl. 21:17, skrev rbowman:

True, but it's not a problem in my local WiFi network. I suppose I could
put the fours or five machines in the hosts file. At work there is DNS so
using host names work but at times it's handy to know what subnet a
machine is on. If you can do that from a IPv6 address I've never figured
it out.

It's pretty much the same with IPv6 as it was with IPv4, it's just that the numbers are bigger.
Where in IPv6 you have 32 bits, in IPv4 it's 128. The most common (and in fact, prescribed for local networks) subnet in IPv6 is a /64, so exactly half of the 128 bits.
Also, the 128 bits are written in groups of 16 bits (or four hex digits), separated by colons. One such bit of 16 bits is called a hextet.
So if I'd have an address 2a0a:4580:103f:c0de::1 (which is just another way of writing 2a0a:4580:103f:c0de:0:0:0:1) in a /64, the subnet would be the first 64 bits = 4 hextets, ie 2a0a:4580:103f:c0de::/64.
If I have a more elaborate IPv6 address, such as 2a0a:4580:103f:c0de:da7f:7136:fbd6:e64d/64, it's still simple: split up in the middle and you have your subnet (or 'routing prefix' in IPv6 lingo): 2a0a:4580:103f:c0de::/64.
Cheers,
Koen
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