• Subject: RE: Overlays and page segments
  • From: "Joe Pluta" <joepluta@xxxxxxxxxxxxxxxxx>
  • Date: Sun, 21 Jan 2001 16:24:52 -0600
  • Importance: Normal

Leif, as I think I pointed out in my original post, the obvious problem was
that the AS/400 was not responding to external addresses.  I checked this by
making sure that the AS/400 did respond to internal addresses, and that
non-AS/400 devices responded to external addresses.  This ensured that it
was not a problem with malformed packets of some type, and so indicated that
it was specifically an issue with the AS/400 and external addresses.

I then got a response from JAVA400-L that I might need a route statement to
route external addresses.  Adding a route table entry for *DFTROUTE and
SUBNETMSK(*NONE), and pointing that to my router did the trick.  Sitting
back, it makes sense, because my line definition is set up to respond
directly to internally address packets (using a subnet mask of
255.255.255.0), but has no direction on what to do with external packets.
That means my AS/400 had no idea how to handle anything with those spoofed
packets from my router.

By adding a *DFTROUTE statement, that means that responses to external
packets are sent back to my router, to be directed to the appropriate
destination.

Whether this is "random hacking" or not, I'm not exactly sure <smile>.  I
like to think of it as empirical testing - I figure out the various
permutations of conditions, test each one, build a table of results, and
then from that extrapolate the workings of the subsystem.  For consistently
programmed subsystems, this works, and for the most part IBM subsystems are
very consistent (that is, presenting the same input twice normally gets the
same output).

Joe


> -----Original Message-----
> From: owner-midrange-l@midrange.com
> [mailto:owner-midrange-l@midrange.com]On Behalf Of Leif Svalgaard
> Sent: Sunday, January 21, 2001 4:09 PM
> To: MIDRANGE-L@midrange.com
> Subject: Re: Overlays and page segments
>
>
> From: Joe Pluta <joepluta@plutabrothers.com>
>
> > To all... problem solved.  Because the router was spoofing an external
> > address, I had to add a *DFTROUTE entry to my route list.
> >
>
> Joe,
> Did you get that out of the manual, help-info, etc, or by
> random hacking?  What is the rationale behind your solution?
>
>
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