Problem Description
On-site inspection found that the ARP entry usage on the switch remained at 100% persistently
Process Analysis
Display ARP all to view specific ARP entries and find a large number of similar ARPs learned through VXLAN tunnels.
Suspected that the issue was caused by learning excessive ARP packets from remote ends, then used the command vxlan tunnel arp-learning disable to turn off remote ARP auto-learning function, but the fault persisted.
Solution
After excluding remote self-learning, acknowledge that ARP is learned from different VISs. The large number of terminals under different VISs causes ARP to exceed specifications. It is recommended to improve device performance.