multi-controller network install question

[Ken Stillson]

  hi.  Here's the situation: our "server" has two ethernet controllers,
  each with its own inet address.  One goes to the main internet network,
  the other to our lab.  We want to seperate lab traffic, and don't care
  if local users must log though the server to get outside.

  So- The outside world needs to know the server as 128.29.22.1, and is
  attached to contrller ie1.  The lab knows the server as 128.29.22.7, and
  is attached to ie0.  Here what I tried in rc.local:

# ie0 to local net as -gw:
ifconfig ie0 128.29.22.7 netmask 128.29.22.255 broadcast 128.29.255.255
# ie1 to mitre net as srv:
ifconfig ie1 128.29.22.1 netmask 255.255.0.0 broadcast 128.29.255.255

  It almost works.  The outside can see the server, but not the lab 
  stations (that's good), the lab can see the server, but not the outside,
  (still fine), and the server can get to the outside (good), but the
  server cannot get to the lab!  After watching the little blinking lights
  on the control boxes, I realized that the packets I intended to go to
  the lab are being sent to the ie1 controller.  This is conformed by the
  fact that if I "ifconfig ie1 down" then the server gets to the lab fine.

  Can anyone lend me a hand in getting this sun 4.1.1 server to grasp the
  desired network design?  I can provide any additional information you
  need, and would _really_ appreciate some help in getting this solved.
  Thanks in advance.

     - Ken Stillson,   stillson at mitre.org


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