Hello!
NMSDK compatibility with ONTAPI versions is documented in the IMT. For NMSDK 5.4 here is the list:
NetApp ONTAPI 1.30
NetApp ONTAPI 1.21
NetApp ONTAPI 1.20
NetApp ONTAPI 1.19
NetApp ONTAPI 1.17
NetApp ONTAPI 1.15
NetApp ONTAPI 1.14
NetApp ONTAPI 1.13
NetApp ONTAPI 1.12
NetApp ONTAPI 1.11
NetApp ONTAPI 1.9
NetApp ONTAPI 1.8
NetApp ONTAPI 1.7
NetApp ONTAPI 1.6
NetApp ONTAPI 1.5
NetApp ONTAPI 1.4
NetApp ONTAPI 1.3
NetApp ONTAPI 1.2
NetApp ONTAPI 1.1
NetApp ONTAPI 1.0
It also lists ONTAP versions, which 8.3.1 is listed as supported...ONTAPI 1.30 was released with 8.3.0 and 1.31 was released with 8.3.1, so it's not 100% clear which is accurate.
That being said, NMSDK is primarily an enabler for accessing ONTAPI/ZAPI, so it *should* still work. For the API you're specifying, are you executing against the Vserver/SVM, or against the cluster? "net-routes-create" should be directed at the SVM.
Hope that helps.
Andrew
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