Hi,
You can get the sysoid values from any of your NMS software.
I checked for JL256A (Aruba 2930F 48G PoE+ 4SFP+ Switch) and system object id (sysoid) is .1.3.6.1.4.1.11.2.3.7.11.181.21
I do not have JL357A (Aruba 2540 48G PoE+ 4SFP+ Switch) right not, i will check and post you later the above sysoid value dosent work for this model.