As Glen already mentioned Celerra Data movers do not run any Navisphere Agent - these Data Mover Initiators are manually registered on the CLARiiON if you have the Gateway model or FC Enabled Model ( I am assuming you have the FC Enabled NS480). And the IP Address associated with the Data Mover Initiators are either of the Control Station or the internal IP Addresses of the Data movers.  There should not have been any effect after the DART and Flare upgrade as earlier also these were unmanaged hosts - may be you have not noticed them before.  What Rupal mentioned is correct for any other SAN attached hosts which has Navisphere Agent running - but not for the Celerra Data movers.  Thanks,Sandip
After we upgrade to the lastest FLARE and DART codes on our NS480 w/ CX4 backend in navisphere our celerra unders hosts shows host agent not reachable  any suggestions?
host agent on celerra not reachable