Description

Routers R1 nad R2 are connected through the serial HDLC line. The capture is displaying a moment when we shutdown the fastethernet interface of the R2 router. Capture displays the exchange of Query packet emitted by the R2 router for its neighbors (R1 here) asking them to provide information for missing route (the metric for the 192.168.2.0 network of the Query packet is set to max EIGRP value). The R1 router Acknowledge the receipt and answer with Reply EIGRP packet telling back it has no information about the 192.168.2.0 network (the metric for the 192.168.2.0 network of the Reply packet is set to max EIGRP value). The receipt is Acknowledged, as the result the route is deleted from the EIGRP topology and routing table of the R2 router.

Topology

|—-FA0/0-(192.168.1.1/24)—-|R1|—-s0/0—-(1.0.0.0/30)—-s0/0—-|R2|—-Fa0/0-(192.168.2.1/24)—-|

Number of packets: 4