Unity Storage System - Backup and DR Testing Interface NDMP + Link Aggregation

Hello 

I have questions about the Backup and DR Testing Interface of Unity Storage System.

 

Following situation:

I wish to replicate synchronous a NAS server between UnityA and UnityB. On the desination UnityB, I want to Backup the file systems of the NAS Server via 3-way NDMP. 

1. Is it possible to Backup the NAS server via Backup and DR Testing Interface on the desination UnityB via 3-way NDMP? 

If it is not possible via the Backup and DR Testing Interface, what would be an valid option to do so?

2. Is it possible to create an HA Interface (Link Aggregation), wich should be used for async Replication and also the mentioned Backup and DR Tesing Interface. Each of them in different VLANs. I did not find anything, if it is allowed to use HA Interfaces for Backup and DR Testing Interface. 

 

On the following PDF on page 12 is all i found regarding Backup and Test Interface:

https://www.delltechnologies.com/en-us/collaterals/unauth/technical-guides-support-information/paydaysverige.com

On the following PDF on page 19 is nothing mentioned about the Backup and DR Testing Interface

https://www.delltechnologies.com/resources/en-us/asset/white-papers/products/storage/h15162-dell_emc_unity-high_availability.pdf