Spooky Routing by Sun TCP/IP

George E. Lehmann (apctrc!zgel05@uunet.uu.net)
6 Jan 88 15:22:50 GMT

Tulsa, Oklahoma
Keywords: routing, tcp/ip, telnet, ftp

We have a bunch of Suns configured on several seperate nets something like:
            | VM running KNET |
     ---------------+----------+----------+--------------- 193.9.200 Ethernet
                               | |
                           +---+---+ +---+---+
                           | Sun A | | Sun B |
                           +---+---+ +---+---+
                               | |
                    -----------+----------+--------- 193.9.202 Ethernet

We have a problem where VM tries to talk to Sun B using Sun A as a router,
but Sun B responds to VM using its 193.9.200 interface. Since VM does not
have the 193.9.200 interface for Sun B defined, it ignores the response.

Questions: Is the Sun trying to be smart, recognizing it can get to the
193.9.200 net in one less hop by using a different interface to respond on?
If so, is there a way to turn off this smartness without unplugging the
second interface?

Any answers to these questions, or general enlightenment in this area will
be greatly appreciated.

George Lehmann,	 ...!uunet!apctrc!zgel05
Amoco Production Co., PO BOX 3385, Tulsa, Ok  74102  ph:918-660-4066
Standard Disclaimer: Contents are my responsibility, not AMOCO's.

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