Bill Cerveny of Arbor Networks has a great post on IPv6 Fragmentation. It works a bit differently in IPv6 from IPv4 and it’s a very important difference. This is especially true when considering how to implement a security policy. Fragmentation is one of the few uses of IPv6 extension headers seen regularly in the wild today and must use Path-MTU to work effectively.
Arbor Networks released a study today that analyzes traffic collected from six ISPs. This report suggests that total IPv6 traffic remains between .1 and .2% of total Internet traffic. However, more of this traffic is now natively routed and not using tunnels. This indicates that infrastructure providers are moving away from tunnels and more end-users are able to get native connections from their providers. These are both positive trends as far as IPv6 deployment is concerned.