The subnet mask used by DSA is a logical mask, that is, it is treated as a mask to determine what connection paths are allowed between Teradata nodes and media servers. You can use a DSA network mask to create a data path between a Teradata node and a media server if the Teradata node and media server are physically connected. The DSA network mask setting does not override any physical subnet mask.
Use the default network mask, populated by DSA, that is based on the data path between Teradata nodes and media servers.
Do not change the default network mask. If there is no matching physical network connection, the job will be able to submit but still fail in the end.
Remove the network interfaces not used in the data path in the DSC Setup portlet for media server.
Guidelines for DSA Network Mask
Teradata nodes and media servers should be on the same physical subnet.
Different Physical Subnets
If Teradata nodes and media servers are on different physical subnets, but can communicate with each other, open up the network mask as relevant.