The alarm can generate when any of the following happen:
1. On the VSS application model, Spectrum reads the cvsSwitchMode attribute to see if the device is part of a VSS. If it is, then Spectrum reads the chassis count. If the chassis count is 1, Spectrum will generate the alarm because there needs to be more than 1 chassis in a VSS configuration.
2. If you model the VSS device and one of the chassis is down when you create the model .
3. If you model the VSS device and there is more than 1 VSS configuration on the device.