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Then have to restart the base processes so that the timing system can reload it's default constants from the database (e.g. msgdelays which protect the buffering)

This error message ("Establishing link...") means that the initial ethernet communication between the ATCA board the pyxpm software is not establishing a connection.  That either means the network is down for some reason, or the board is already connected to another instance of pyxpm somewhere.
'amcc_dump_bsi --all shm-tst-lab2-atca02/2' (from psdev) will tell you if the slot 2 xpm (XPM:2) ethernet link is up.

Not Understood Failure Modes

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