Stuck in Active:
When a router lost any one route (route went down) then it will start query about that down route to the neighbor routers. And the neighbor router will send query to next and so on until they get reply about that route. During this mean time all routers went too stuck in active mode.
STUB Router is used to eliminate this stuck in active problem. Stub router won’t receive query, reply to query etc.
#router eigrp 100
#eigrp stub
NOTE:
Ø Stub router won’t send the redistributed routes from any router to other
# eigrp stub redistribute (won’t work)