- 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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