I also faced the same error message "unknown entity" while adding in collector today. I searched for solution in discussion forum and found your message. Am currently having 12.2(16a) version on my router. It is IP version not Entriprise. But it supports RTR.
Is it a mandatory thing that the IOS should be Entriprise edition?
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...