"configure routers in the EIGRP domain to wait up to 5 minutes for a response to an EIGRP query message"
Ok this seems pretty straight forward but what if the question wanted an "even" number of minutes e.g. 4 or 2 (we can only configure the active time as whole numbers of minutes so 2.5 minutes is not an option in this case)?
The reason I ask is that the time an EIGRP router wait for a response to a query depends unless I have misunderstood the SIA-Query and SIA-Reply messages.
Route goes Active (default active time of 3 minutes):
0 seconds-> Query sent
90 seconds (half the Active time) -> SIA-Query sent
<- SIA Reply received
180 seconds (half the Active time) -> SIA-Query sent
<- SIA Reply received
270 seconds (half the Active time) -> SIA-Query sent
<- SIA Reply received
360-> Reset neighbor
So as long as SIA-Replies are received the neighbor is not reset for 2x SIA timer, if SIA-Reply is not received then the neighbor would reset after 180 seconds as normal. So the time to wait for a Query would either be 3 minutes or 6 minutes depending on the state of the network and hosts involved.
So back to my original point if you were to configure the EIGRP to wait up to 4 minutes then correct answer would be to configure the active-time as 2 minutes?
Nick
