Posts tagged ipv6

ipv6 adressing

posted on 2016-08-30 12:59

Since I forget this time after time, so here are some notes.

  • An ipv6 address has 128 bit max.
  • Eight field with 16 bits each.
  • Leading zeroes may be omitted.
  • One list of consecutive zeroes may be omitted.
  • Put them in square brackets when having to specify ports: [1:2:3:4:5:6:7:8]:443
  • Customers get /48 from their ISP.
  • Hosts use /64 networks, which is the subnet size to use for everything, don't go smaller or larger.
  • ::/0 eqals 0.0.0.0/0

Some prefix examples:

  16   32   48   64   80   96  112  128
0001:0002:0003:0004:0005:0006:0007:0008

0001:0002:0003:0004:0005:0006:0007:0008

0001::/16
0001:0002::/32
0001:0002:0003::/48
0001:0002:0003:0004::/64
0001:0002:0003:0004:0005:/80
0001:0002:0003:0004:0005:0006:/96
0001:0002:0003:0004:0005:0006:0007::/112
0001:0002:0003:0004:0005:0006:0007:0008/128

0001:0002:0003:0004:0005:0006:0007:0008 = 1:2:3:4:5:6:7:8

1000:2000:3000:4000:5000:6000:7000:8000 = 1000:2000:3000:4000:5000:6000:7000:8000

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