On the Evolution of Ubuntu

I’m setting IPv6 aside for a moment to comment on Ubuntu 12.10.  Thanks. Ubuntu 12.10, which is scheduled to be released later this month, is adding a feature that seems to have some fellow ‘nixers up in arms.  The Dash search bar which allows you to find pretty much anything on your computer is adding…

Deprecate, Deprecate, Deprecate

IPv6 has added many new words and ideas to the lexicon of IT professionals.  One of the least expected:  deprecate. The dictionary (dictionary.com) says that deprecate means “to express earnest disapproval of”, to “urge reasons against” or, oddly, “to pray for deliverance from”.  In the IT world the world a thing being ‘deprecated’ is a…

Know Thy (IPv6) Neighbor

In IPv6 there are four [tables | lists | data structures] used as part of the packet forwarding process (e.g. Neighbor Discovery and the Conceptual Sending Algorithm).  They are: Neighbor Cache Destination Cache Prefix List Default Router List These data structures are currently defined by RFC 4861 (and previously by RFC 1970 and RFC 2461,…

IPv4 Scar Tissue

I recently read a few articles from around the the Internet regarding the debate surrounding the use of /64 or /126 prefixes on P2P links. Here is a response I left on another site: “The idea of using /126′s is little more than scar tissue from our experience with IPv4. It is the application of…