"Naming cache timeout value?"

    A CDI naming cache is used to improve the performance of nodename
    address resolution.  This cache supersedes the DECdns cache and is
    used when looking for addresses in the Domain and Local services, in
    addition to DECdns.  Note that other applications that use DECdns
    directly continue to utilize the DECdns cache.

    The CDI naming cache includes a mechanism to "timeout" old entries.
    In this way, these entries are periodically refreshed to accurately
    reflect the actual network environment.

    For example, say that node FOO has address 1234.  After DECnet-Plus has
    looked up node FOO, it will store this address in its cache.  If node FOO
    were to change it address to 2345, the following events would occur:

         - DECnet-Plus would retrieve address 1234 from the cache.

         - a connection attempt would be made to address 1234.

         - if the connection failed, DECnet-Plus would automatically look up
           the address again, bypassing the naming cache.  This new lookup
           would find address 2345, update the cache, and connect
           successfully.

    However, if address 1234 had been reassigned to another node BAR, the
    following would occur:

         - DECnet-Plus would retrieve address 1234 from the cache.

         - a connection attempt would be made to address 1234.

         - the connection would succeed - DECnet-Plus cannot tell that
           it has connected to the wrong node.

    To prevent this scenario, network administrators should not reassign node
    addresses until the naming cache timeout period has passed.  This will
    allow these addresses to be automatically flushed from the caches.

    You have the option to set a value for the naming cache timeout interval.
    Enter any legal OpenVMS delta time value (the default is 30 days).