Experimental Design of Router Debugging based Neighbor Cache States Change of IPv6 Nodes

Current IPv6 node neighbor cache teaching practices focus on theoretical introductions and graphical explanations, and lack targeted experiments on neighbor cache states change. Since the neighbor cache states of IPv6 nodes change rapidly and some specific states are difficult to observe, the EVE-NG platform, which can combine Cisco router debugging with Wireshark packet capture and analysis, is introduced to experimental teaching to set up two comparative verification experiments of IPv6 neighbor cache states change, which are states observation of IPv6 node neighbor cache based on address resolution and packet parsing, and refined observation of IPv6 node neighbor cache states based on router debugging. Through these two phased experiments, students can not only visually observe the changes of the neighbor cache states of IPv6 nodes, but also deeply understand the timer and event-triggered change mechanism of the neighbor cache states of IPv6 nodes. Judging from actual teaching practices of two different classes, the EVE-NG experimental platform and two phased experiments have been well evaluated by the students, which have achieved good experimental teaching effects.