IPv6

Links

• What’s the Deal with IPv6 Link-Local Addresses?
• IPv6 Address Representation and Address Types

• Global Unicast Address format

DNS

Check delegation

dig 1.e.0.1.8.8.8.0.1.0.0.2.ip6.arpa ns

IPv6 on Linux

• Linux IPv6 HOWTO
• IPv6 on Debian
• http://www.cyberciti.biz/faq/debian-linux-ipv6-networking-configuration/
• http://ipv6.raphnet.net/

Protocols and Acronyms

SLAAC

• SLAAC on Wikipedia

Neighbor Table

States:

• Incomplete — Address Resolution is in process. The neighbor has not yet responded.
• Reachable — Neighbor is known to be reachable.
• Stale — Previously-known neighbor is no longer reachable. No action is taken to verify its reachability until traffic must be sent.
• Delay — Previously-known neighbor is no longer reachable. The interface is in Delay state for a predefined Delay Time. If no reachability confirmation is received, the state changes to Probe.
• Probe — Neighbor is no longer known to be reachable and Unicast Neighbor Solicitation probes are being sent to verify reachability.

NS-interval

       neighbour sollication interval

ND reachable time

       how long will neighbour be reachable

DAD

       duplicate address detection

RA

Router advertisement

global unicast address or GUA

http://www.tcpipguide.com/free/t_IPv6GlobalUnicastAddressFormat-2.htm

The part of the IPv6 address space set aside for unicast addresses is structured into an address format that uses the first 48 bits for the routing prefix (like a network ID), the next 16 bits for a subnet ID, and the final 64 bits for an interface ID (like a host ID).

Tools

• ipv6calc
• subnetcalc

FAQ

Can't ping link-local

ping -6: Invalid argument

or

Destination unreachable: Address unreachable

append "%eth0" or whatever interface name to the address