Problem with multiple network interfaces

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http://www.unix.com – Hi .. we have two AIX 5.3 systems with a small client server app communicating over a TCP socket. Box A has a single network interface where the server app (in Java) opens a well known port and waits for connections from Box B. Box B has two network interfaces, X and Y. Interface X has the box name assigned to it but we need the two boxes to communicate via interface Y as it is on the same sub-net as A. So, the app on B binds it's socket to Y. When the Client app (C++) on A contacts server B, all goes well from a B standpoint and B responds with a message on the new socket created by the 'a (HowTos)