So a route goes down, there's no feasible successor, and the router queries its neighbours, who in turn query their neighbours, and so on until it reaches every EIGRP router in the domain. During this time, the routers will be running timers counting down from 3 minutes, and if they don't hear a response in that time, they'll tear down their neighborships.
What I don't understand is... how could this ever happen in real life? I mean, in what world would it take more than 3 minutes for a query to reach the end of an EIGRP domain??? Is there some very important factor that I'm not taking into consideration here - something that could explain how this could ever be something to worry about?
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