IPv6 day and tunnels

Thu Jun 7 16:05:28 UTC 2012

Here is Matt's full table and descriptive text:

"Note that there is no specific reason to require any particular
 MTU at any particular rate. As a general principle, we prefer
 declining packet times (and declining worst case jitter) as you
 go to higher rates.

              Actual          Vision      Alternate 1  Alternate 2 
  Rate      MTU     Time    MTU   Time     MTU   Time    MTU  Time 
  10 Mb/s  1.5kB  1200uS       
 100 Mb/s  1.5kB   120uS    12kB  960uS    9kB  720uS  4.3kB   433uS 
   1 Gb/s  1.5kB    12uS    96kB  768uS   64kB  512uS    9kB    72uS 
  10 Gb/s  1.5kB   1.2uS   750kB  600uS  150kB  120uS   64kB  51.2uS 
 100 Gb/s                    6MB  480uS  1.5MB  120uS   64kB  5.12uS 
   1 Tb/s                   50MB  400uS   15MB  120uS   64kB 0.512uS 

 The above numbers are very speculative about what MTUs might
 make sense in the market. We keep updating them as we learn
 more about how MTU affects the balance between switching
 costs and end-system costs vs. end-to-end performance."

If you wish, you can also consider Alternate 3 for 9kB:
72us at 1Gbps, 7.2us at 10Gbps, .72us at 100Gbps, .072us at 1Tbps.

Fred
fred.l.templin at boeing.com