Weird Token Ring Message?

[Meyers QSYSOPR <mqsysopr@xxxxxxxxx>]

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[ Picked text/plain from multipart/alternative ]

I have just been given the duties of sysopr and have noticed a strange message 
or two that I would like to run by you folks.  The first message is CPF8B41, 
and the message text is as follows;

Message . . . . :   Adapter has inserted or left the ring on line TRNLINE.
Cause . . . . . :   An adapter has inserted or left the ring on line TRNLINE.
  The reporting adapter is 0050DA738141 and the nearest active upstream
  neighbor (NAUN) of the reporting adapter is 0050DA215C3C.
Technical description . . . . . . . . :   Any adapter that inserts into or
  removes itself from the ring causes a nearest active upstream neighbor
  (NAUN) change report to be sent on the ring. These reports are sent as
  medium access control (MAC) frames which are monitored by the configuration
  report server that in turn reports them to the TRLAN manager.  The NAUN
  change reports are logged to the system history log (QHST) by the TRLAN
  manager.


Any ideas what this message means?



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