Interface names in Spectrum are only ifIndex with an underscore in front and do not contain the associated device model name.
Interfaces Tab of the device in question
May also be noticed in alarms generated for the interfaces
The name of the interfaces are determined by adding the device model name and _instanceid (instance id can be ifname or ifindex).
In the faulty scenario, the device model_name is not updated yet and the interface model tries to read the device name. Due to this the device name is empty and the interface name is shown as only _ifindex.
Release : Any Spectrum version
Component : Spectrum Core / SpectroSERVER