Fixing port offset to 4 rather than 6 means that an operator needs about 6% more public IPv4 addresses to serve the same population. I'm not sure of the cost tradeoff, but what % of BR capacity is likely to be lost if the PSID does not sit on a nibble boundary?

Tom

On 06/02/2013 4:48 AM, Ole Troan wrote:
with this update to the MAP-E revision:
  - reorganized the architecture section to make it cleared what applies to 
shared addresses vs full ipv4 / prefix
  - fixed port offset to 4 (removed port parameters from the base spec)
  - simplified the interface-id text, removed 6052 reference

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