VNX Unified: How to verify the NDMP version on VNX/celerra (User Correctable)

How to:

To check the current NDMP version on the VNX, use the following command:
 "server_param <mover_name> -facility NDMP -list" <-- It will list the NDMP parameters
check for "maxProtocolVersion" which verify the current version of NDMP.
Example:
[nasadmin@123-VNX5600 ~]$ server_param server_2 -facility NDMP -list
server_2 :
param_name facility default current configured
maxProtocolVersion NDMP 4 4 <------------ maxProtocolVersion parameter will show the NDMP version 
scsiReserve NDMP 0 1 1
DHSMPassthrough NDMP 0 0
CDBFsinfoBufSizeInKB NDMP 1024 1024
noxlt NDMP 0 0
bufsz NDMP 128 256 256
convDialect NDMP 8859-1 8859-1
concurrentDataStreams NDMP 4 8 8
includeCkptFs NDMP 1 1
md5 NDMP 1 1
snapTimeout NDMP 5 5
dialect NDMP
forceRecursiveForNonDAR NDMP 0 0
excludeSvtlFs NDMP 1 1
tapeSilveringStr NDMP ts ts
portRange NDMP 1024-65535 1024-65535
snapsure NDMP 0 0
v4OldTapeCompatible NDMP 1 1

By default, some servers and NDMP devices autonegotiate to use the latest NDMP version supported by the Data Mover and the NDMP backup software. It is recommended to use
this default setting. If necessary,you can override the process by specifying the latest NDMP version

To override the autonegotiated NDMP version, use this command syntax:
$ server_param <movername> -facility NDMP -modify maxProtocolVersion
-value <new_value>
where:
<movername> = name of the Data Mover
<new_value> = value you want to set for the parameter
Example:
To set the NDMP version to 3, type:
$ server_param server_2 -facility NDMP -modify maxProtocolVersion -value 3

Parameter and facility names are case-sensitive. The maxProtocolVersion parameter setting overrides the autonegotiation.

EMC document reference:
"Configuring NDMP Backups on VNX"
https://support.emc.com/docu48452_Configuring-NDMP-Backups-on-VNX-8.1.pdf?language=en_US