Storage Node Network connectivity to Datadomain best practices

I am looking for some advise on the best practices on connecting networker storage nodes in a environment where clients are having backup IP's in several different VLAN's . So basically our storage nodes will contact NDMP clients over their backup networker in layer-2  on diff vlans and need send the backup data to data domain on separate vlan.

To depict this here is how we are currently backing up

NDMPClient1-Backup-vlan1---------->Storage Node-Backup-Vlan1( Vlan5)---------->DataDomain over  Vlan5

NDMPClient2-Backup-vlan2---------->Storage Node-Backup-Vlan2( Vlan5)---------->DataDomain over  Vlan5

NDMPClient3-Backup-vlan3 ---------->Storage Node-Backup-Vlan3( Vlan5)---------->DataDomain over  Vlan5

NDMPClient4-Backup-vlan4 ---------->Storage Node-Backup-Vlan4( Vlan5)---------->DataDomain over  Vlan5

So for every NDMP client backup vlan  we defined and interface on storage nodes in the same Vlan.

And from Storage node to Datadomain connectivity we have a seperate backup vlan in layer-2

Since this is a 3 way NDMP backp , the traffic flows from clients to Storage nodes in one network and from storage nodes to Dataomdin in a different paths.

is this is a good model or do we have any other model that we can adopt to have better backup/restore performances.

Thanks in advance