[Simh] How to route Phase II

[b4 at gewt.net]

----- Original Message -----
> From: "Paul Koning" <paulkoning at comcast.net>
> To: "SIMH" <simh at trailing-edge.com>
> Sent: Thursday, March 3, 2016 7:14:35 AM
> Subject: [Simh] How to route Phase II

> Thanks to help from Timothe Litt, I have Phase II support, including just enough
> "intercept" support to be useable, working in my Python router
> (svn://akdesign.dyndns.org/pydecnet/trunk/pydecnet).  Tested it with a KS-10
> TOPS-20 setup.  I had it do NFT from a DECnet/E system two hops away.  Worked
> correctly including the handling of the text (ASCII) data.
> 
> It doesn't do all that is required for intercept nodes -- tracking NSP
> connections so it can disconnect them if the path goes away.  Also, Phase II
> NSP does not do packet timeout and retransmit, so if a packet is lost on the
> path to the destination, the connection is wedged.  I may end up doing a bit
> more than standard intercept operation and do timeout/retransmit on behalf of
> the end system.  That's cheating, of course, but why not?
> 
> Anyway, this may help those who have Phase II systems.  Comments and feedback
> and bug reports appreciated.

Time for embedded python...;)

> 
>	paul
> 
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