2 routers were rebooted and changed the ifIndex. NFA got confused and shows some strange flow for interfaces which don't exist anymore. We offered to delete the router as a solution< but customer doesn't want to lose all related data.
I thought I can try global rediscovery in NFA:
"To force a global rediscovery run the command in the reporter database:
update routers set lastRefresh=0, firstPollError=0, nextPollRetry=0;"
Do you think it can be useful in this case? Will it not overload the server since we have around 3000 routers and 5000 interfaces?
This article gives nice solution