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IP Path Selection? Routing?

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The Question is:

We have two alpha's configured in a primary/backup configuration.  Each of
 these computers have two network interface cards installed (for a redundant
 network).  Now take this configuration and multiply it by two because we have
 two units (we are a power
generator) running this configuration.
All four of these computers send data to a single computer elsewhere on the
 network.  3 of the 4 alpha's use card "a" to talk to this computer and one
 uses card "b".  Cards "a" are on the same wire and cards "b" are on their own
 wire, but the two wires ar
e connected through bridges (with spanning tree enabled).
My question is this.  How does UCX decide which interface card to use to talk
 to this remote computer?  I have looked at the ucx tools and none of them seem
 to tell me that destination address X is bound to card "a" or "b".
Where can I get some good documentation on how UCX makes these decisions?

The Answer is :

  The OpenVMS Wizard doubts there exists documentation providing details
  of the routing path-selection process, and would not expect to find
  such documentation.
  There are generally mechanisms available to select the prefered path,
  of course.

answer written or last revised on ( 18-JUN-2004 )

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