A Cisco whitepaper is http://www.cisco.com/en/US/tech/tk59/technologies_white_paper09186a0080174a5b.shtml http://www.cisco.com/en/US/tech/tk59/technologies_whit

A Cisco whitepaper is http://www.cisco.com/en/US/tech/tk59/technologies_white_paper09186a0080174a5b.shtml http://www.cisco.com/en/US/tech/tk59/technologies_white_pape... This was posted earlier on HN http://news.ycombinator.com/item?id=1986867 http://news.ycombinator.com/item?id=1986867?