I need a little clarification about this primus:

if i have
[nasadmin@emcnas nasadmin]$ nas_version
5.5.31-6
AND
[nasadmin@emcnas nasadmin]$ server_version ALL
server_2 : Product: EMC Celerra File Server Version: T5.5.31.6
server_3 : Product: EMC Celerra File Server Version: T5.5.31.6
IN THE CCA
What type of upgrade do i have to do


Upgrade - Data mover NAS level: From Type>To Type>Online/Offline

OR

Upgrade - NAS Base Level: From Type>To Type>Online/Offline


Thanks in advance