I will be crazy, I read in (CCNP BSCI Official Exam Certification Guide, Fourth Edition)
Page#64 the author said,
"If the querier does not receive a reply from each of its neighbors, it repeats the
query as a unicast to each unresponsive neighbor until it either gets a reply or gives up after
And in Page#70the author said,
"When queries are produced, the router changes to an active state and sets a timer (typically three minutes). If the timer expires before an answer comes back then the router is considered stuck in active."
My question is it is tries 16 attempts to get replay or waiting 3 minute to consider is SIA or both is different.