-> Configure the speed using "Manual override" (Advanced Options) on those interfaces where you are getting the alarm(s).
Optionally, this can be adjusted in your bulk configuration for this probe, by filtering on the agents then editing the "Modify Interface Values: Configure interface settings" dialog.
In this dialog, under "Enable Monitoring" you will see two options:
- using percentage (%),
- using values (e.g. Mb/s)
Change your monitoring to the "using values" section and you will no longer see the problem with the ifSpeed counter not being present on the device(s) you are monitoring. You will need to set a low/high threshold based on the amount of traffic you wish to alarm on.
Alternatively, you can filter these alarms at the alarm server (nas) level by adding an auto-operator profile or pre-processing rule to acknowledge or ignore these alarms when they are processed by the nas.