Chris,
   I think you have had a better experience with SNMP than I am 
currently having.
You asked about the 'can of worms' relating to Polling for SNMP Traps.
The IPTV devices we are polling sometimes don't even respond within 30 
seconds. Nasty.
The 5 servers are supposed to respond with the same data. They don't. 
Why? They are running  different firmware and the supplier is very very 
very reluctant to make them identical.
Another SNMP emitter has been configured incorrectly. To get it fixed, a 
guy will have to come from Bahrain. He will remove the unit and then 
ship it to India where sometime in the next month they might possibly 
correct the problem, ship it back and we can try again.
Not a happy bunny especially as it is the weekend here and I'm stuck in 
the basement of the airport wearing ear defenders trying to keep the 
incessant fire alarms from slowly driving me mad.
And so it goes on.
Stephen Davies
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