Unable to join EMC Celerra / CLARiiON into domain – Status: Not logged in

At a customer site I saw a strange behavior between two EMC NS-480 systems. It was impossible to bring the two Celerras and the two CLARiiONs into one domain. If you logged into with one of the CLARiiONs SP IP-addresses into Unisphere you could see all 4 systems, but both Celerras showed “Not logged in” […]