Many folks out there will bump into this problem when they tried to create a Performance Collection Rule and target it to a custom SNMP Device Group.
Let me give you an example here:
I have a group of Extreme Network Switches that I need to collect the temperature for these devices. Hence I created a Group that consist only the Extreme Network switches.
Then like most people, you will just go over to create an SNMP collection rule to collect the performance and will target the rule to the SNMP device –> Only to encounter error when you try to Create the rule.
How to resolve this:
One workaround that I tried was this. When you create the rule, instead of targeting the custom Group, target to the SNMP device. But DO NOT enable the rule.
This will create a Rule that is Disabled by default. Now you just need to Override this rule and target back at the Extreme Network Switch and set to Enable it.
This should get things working.