IPv6 Notes -Part2

IPv6 Address Autoconfiguration:

■ Stateful autoconfiguration : using DHCP .
■ Stateless autoconfiguration : using EUI-64 process .
  - EUI-64 :
standard places the hex value FFFE into the center of the MAC address for this purpose. Finally, EUI-64 sets the universal/local bit, which is the 7th bit in the Interface ID field of the address, to indicate global scope.
Here is an example. Given the IPv6 prefix 2001:128:1F:633 and a MAC address of
00:07:85:80:71:B8, the resulting EUI-64 address is
2001:128:1F:633:207:85FF:FE80:71B8/64

ND Messages Types:

■ Router Advertisement (RA) : Routers advertise their presence and link prefixes, MTU, and hop limits.
■ Router Solicitation (RS) : Hosts query for the presence of routers on the link.
■ Neighbor Solicitation (NS) : Hosts query for other nodes’ link-layer addresses. Used for duplicate address detection and to verify neighbor reachability.
■ Neighbor Advertisement (NA) : Sent in response to NS messages and periodically to provide information to neighbors.