hi,
we would like to introduce support for STP and its alternatives into NPM. I would be very interested to talk to you directly.
But to your case, what you mean by saying "switch show things as fine"? Do You use some other software or using SNMP walk? In your case, you may do two things:
1) you can modify your alert or trigger condition for this specific interfaces (first you may put there list of interfaces names which you know are typically involved in backup lines or you may extend the time of alert trigger
2) you may stop monitoring statistics data on interfaces where you are interested only in UP/Down status.
