I still have doubt on this even after reading 100 times. Hold down timer is intiated when the router recives an update with metric higher than the current metric it has.
(1) Split horizon with route poison sends back few updates with metric 16. Upon receiving this update, what the local router does with it? Will it drop?
(2) If for some reason, hold down timer is initiated, local router still advertise that route in its regular updates?