In the past e0M was only a 100Mbit port, nowadays it is 1GBit, but data ports e0c, e0d, etc. are at minimum 10Gbit. So Commvault recommends using those data ports, because of the supported speed.
Back to NetApp: You can configure NDMP backup traffic through intercluster (default), cluster-mgmt or node-mgmt. You would host your intercluster LIFs on 10G Ports, maybe your Cluster-Mgmt as well, when you are using VLANs. Node-Management remains the last ressort, since those are always hosted on e0M.
Back to Commvault: Communication to NetApp will run through Cluster-Management (Tunneling) or SVM Management. NDMP Backuptraffic will always run through the configured LIFs (Intercluster by default) from the node where the backup volume is hosted. So make sure those LIFs are reachable from the MediaAgent from the Primary Copy of the used storage policy.
Regards
Mario
