Cross compatibility between Device firmware version and NED version

[nso20]

Hello,

I know there is Cross compatibility between NSO version and NED version. But how to know Cross compatibility between Device firmware version and NED version ?

e.g.: IOS version 6.x --> NED version 3.x

Junos version 20.x --> NED version 7.x   

... etc

Thanks in advance

[snovello]

Hello,
The CLI NEDs and even the JUNOS Netconf NED, are all intended to support any version of an operating system. That means if you have an NED, you should be able to use it with any device with that firmware on any version. This means that if the models are missing something or you run into an issue you can open a TAC case and TAC cannot say your NED version and firmware version are mismatched, at most they may direct you to upgrade to the latest NED to get an already implemented fix.