When the device is modeled as GnSNMPDev serial number is populated but the Manufacturer field is empty.
When the device is modeled as Rtr_Cisco the serial number is empty.
Release : ALL
Component : Spectrum Core / SpectroSERVER
The deviceSerialAttr/0x3d0063 by default points to the chasisid/0x210b5d attribute for the serial number value. In some cases, the chassisid OID on the device is not correctly populated.
deviceSerialAttr/0x3d0063 Value: 0x210b5d
chassisid/0x210b5d OID: 1.3.6.1.4.1.9.3.6.3.0
1. Fix the device-level issue so chasisid attribute (0x210b5d) is populated (Recommended Solution).
-OR-
2. Change DeviceSerialAttr atribute value to 0x0 and reconfigure the model and Spectrum will try and obtain the Serial number from the ENTITY-MIB