It has been many years since I've Netapp'd (DATA OnTap 6 era), so I'm having to do a crash course on ONTAP 9.7 🙂
Looking at configuring NDMP backups to Netbackup and for cluster aware backups they want to talk to the Cluster Managment LIF, which is kind of awkward as that LIF on the Netapp is in a "management" VLAN the Netbackup servers cannot talk to, but I can create a LIF in the common "backup" VLAN.
Is it acceptable to create an extra cluster management LIF in the backup VLAN (and also to keep the existing cluster management LIF)
Creating multiple cluster management LIFs can cause issues with communication so do so carefully. Nothing prevents you from creating and using more than one cluster management LIF. I found the below issue as an example, there could be others.
Cluster Switch Health Monitor (CSHM): Cluster switches not reachable with multiple cluster management LIFs