The subnet mask column for all devices is always 0.0.0.0.   The column uses attribute 0x12dbc which is a calculated attribute.   Is there a reason why this is always 0.0.0.0?   This extraction of this value through the REST API is required for a few projects.   For most of the devices, we can use 0x100af.   

There is an issue with the normalization of the data.

Release : 10.4.1

Component : Spectrum Core / SpectroSERVER

For most of the devices use external attribute ipAdEntNetMask  0x100af. 

This will be resolved in a future release of NetOps via DE467546