NDMP Backup Configuration with CAB

MiguelXco — Wed, 04 Jun 2025 09:52:07 GMT

Hi.

My client it’s using NDMP for FlexGroups backups by using Netbackup 10.0 . We want to take advantage of CAB so we configured the “SVM-scoped” for all the data SVM’s and using as “preferred-interface-role” for NDMP the one configured data type lif of the vserver so we use a dedicated lif for moving backup data traffic to de backup server.

In this case when we start a backup for the volumes that resides in the same node of the lif used for backups everything works fine. But when we migrate that lif to the partner node

to simulate a port failure the backup fails with the following message:

“ERROR: NDMP Vserver Connect: couldn't find any appropriate preferred local src IP address.
ERROR: NDMP Connect: Unable to Connect to [X.X.X.X]:3220 due to Network is unreachable.”

Is there any additional ndmp, lif or other configuration that I might be missing here? Volume affinity prioritizes any lif on the same node as the backed up volume?

As a recap. What we need (if possible) is to configure a dedicated data-type lif for backup-data traffic that give us the chance to keep backing up data even when it is migrated to the partner node.

Thank you all in advance!

Re: NDMP Backup Configuration with CAB

Ontapforrum — Mon, 13 Mar 2023 11:08:05 GMT

You are probably hitting the following issue covered in this kb.

Issues configuring the backup program backups are failing:
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Protection_and_Security/NDMP/Issues_configuring_the_backup_program_backups_are_failing

To resolve this issue, For the "preferred-interface-role", you can opt for 'data'. But, please bear in mind especially for 'Data' LIF, the order in which it is placed in the 'ifconfig -a' output is a key, unless you have configured a separate dedicated VLAN for NDMP backup traffic. Please have a look at the following kb for detailed information.

What is the LIF Choice order for Cluster Aware backups in NDMP?
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/What_is_the_LIF_Choice_order_for_Cluster_Aware_backups_in_NDMP

On the side note:
As I have never done NDMP backup (never had an opportunity) of flexgroups, so I am not sure if all the principles that applies to flexvol applies to it. In anycase, please go ahead and do the testing.

How are NDMP backup logs of FlexGroup different than FlexVol logs?
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Protection_and_Security/NDMP/How_are_NDMP_backup_logs_of_FlexGroup__different_than_FlexVol_logs%3F

https://docs.netapp.com/us-en/ontap/tape-backup/ndmp-management-flexgroup-concept.html

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NDMP Backup Configuration with CAB

Re: NDMP Backup Configuration with CAB