DSA requires you to define which network paths to use when transferring data between the database and the DSA media servers/BAR NC. This is achieved by either configuring a network fabric or a logical netmask. Teradata recommends using the network fabric method in most cases for the following reasons:
- Network fabrics define a specific path which is better for supportability and performance
- Logical netmasks require removing unwanted IPs for all nodes
- Network fabrics make it easier to support the unfolding and folding of the database in public clouds