On Tue, 9 Jun 2009, gabriel montenegro wrote:
For example, one could think of referring interested readers to: MTU and Fragmentation Issues with In-the-Network Tunneling http://tools.ietf.org/html/rfc4459 ; But I don't even know if that is the more appropriate text one would want to point at. I'm cc-ing the author, Pekka Savola, as he may have some more current info for us.
In developing a protocol, I personally think the protocol specification should decide a model to be adopted either in the protocol or in operating the protocol, or just explicitly leave the issue open. RFC4459 just lists some alternatives and their tradeoffs.
Apart from that there isn't much to add. There's a bit more recent 00 draft that also discusses tunnels from an architectural and less practical perspective, but I'm not sure if it provides any more information than the RFC above: draft-touch-intarea-tunnels-00.
-- Pekka Savola "You each name yourselves king, yet the Netcore Oy kingdom bleeds." Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings