This object reports the highest number of EIGRP packets that have ever been waiting in the input queue for processing, for this autonomous system. This is a historical high-water mark rather than a live gauge, so an admin uses it to judge whether this router has ever come close to being overwhelmed by incoming EIGRP traffic, which would be a leading indicator of packets eventually being dropped from that queue. If this object shows a value close to whatever the platform's maximum input queue size is, an admin would treat that as evidence the router has previously come dangerously close to EIGRP packet processing overload, even if it's not currently experiencing that condition.