Wednesday, January 7, 2015

ipv6 types and addresses

link-local

  • similar to APIPA (169.254.x.x)
  • start with FE80
  • randomly generated
  • used to communicate on local network


  • mac address not used by Microsoft
  • conflict detection


always get link-local even with DHCP

unique-local (site local)

  • similar to private IP but not necessary
  • FD00::/8 FC00/7  (1111 1101 or 1111 1100 network id mask)


loopback ::1 (ping ::1)

default gateway ::/0 (ping ::)


Global scope


  • public IP address
  • internet v2 (aka 6bone)
  • 0010 (2xxxx::/3) 
    • 2001, 2002
  • global routing prefix: 48 bits or less
    • assigned to large orgs and split up by them
  • subnet ID: remaining bits in 1st 64 bits after global routing prefix
  • interface id: last 64 bits




link-local

% indicates interface index number to distinguish multiple interfaces

global scope Ip



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