I am also looking for pollable SNMP objects related to ASM actions.
Typically F5 does a decent job of implementing detailed, accurate, and useful SNMP gauge and counter objects for time series monitoring. The only ASM related objects I can find in the MIBs appear to be traps which are not that effective for trending this kind of activity.
It would be nice to see a response from F5 on this very valid request that has been around for five years.
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2017-05-10 adding new info
I opened a ticket on this and the engineer escalated it into feature request ID663539 - Add SNMP MIBs for collecting statistics from ASM.