Hi InterMapper experts!

I am currently using InterMapper to map out devices which have the architecture 
below:

InterMapper --> Master Device (1) --> Slave Devices (100s to thousands!)

There can be hundreds to thousands slave-devices.  Some of these slave devices 
are temperature and humidity sensors, which make sense to use the poll-method.  
Others are event driven devices such as dry-contact and motion sensors.

The event-driven devices are where I am having issue.
I can create an SNMP trap to InterMapper, however, because all the device have 
a single IP address, all of them will receive the SNMP message.  This is an 
issue, for example I have to binary (open/close) event device A and B and an 
alarm occurs when it is in open state:
Let's start with both A and B in closed state hence no alarm.
- When A opens, traps sent to both A and B.  Only A gets an alarm.
- When B opens, traps send to both A and B. B gets an alarm, but A's alarm will 
get reset!

I can use the custom-snmp probe which will cause a query again, but with 
thousands of devices to a single IP, I will trigger thousands of SNMP query 
every time an event occurs. 

Any design ideas where I can over-come this hurdle?

For example, is there a way where I can "hook" into InterMapper's dispatching 
mechanism, i.e. when it receives a trap, instead of sending it to all probes on 
all map with the right IP address, I can add some logic where it must match 
some other probe parameters?

Thank you very much for your suggestions!

Regards,

Leonard Siu
Quantum Data Systems (H.K.) Ltd.

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