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TCP/IP Gateway Address Corruption?

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The Question is:

We have been running UCX v4.1 on OpenVMS v6.2(VAX) for 2 years without a hitch.
 In the last week or so,  the Gateway entry in the UCX volatile database is
 being overwritten by other IP addresses (usually PC IP addresses). The
 frequency is very intermitten
t- from none at weekend, upto 10+ other days. The config. of UCX has not
 changed and is very basic - Host IP, Gateway, 1 NFS mount.
Why is this now happening/how can I prevent it happening ?
All suggestions welcome.

The Answer is :

  The OpenVMS Wizard will assume that the cause is a bug, and not simply
  a manual reconfiguration of TCP/IP Services that you are not aware of.
  While the cause is certainly interesting, it is a often a non-trivial
  problem and is -- beyond its use by the engineer(s) involved in resolving
  the bug -- not particularly useful.  The resolution is arguably far more
  interesting, and this typically involves eliminating the various known
  and previously-resolved problems through the appropriate application of
  software version upgrades and the mandatory and applicable ECO kits.
  Put another way, please move to the current ECO for TCP/IP Services V4.1
  or (better) to V4.2 and the current ECO.  As OpenVMS VAX V7.0 was not a
  major release, you will particularly also want to consider an upgrade to
  OpenVMS VAX V7.3 and TCP/IP Services V5.3 releases or later (as available).

answer written or last revised on ( 10-DEC-2002 )

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