ARP Analysis of Multi-IP ing

Multi-IP ing ARP analysis a company has 30 public IP addresses provided by China Unicom. Some public IP addresses are mapped to private IP addresses of internal servers, and some of them are directly configured on servers, some of them are not currently in use. The network topology is as follows: Here I just want to explain how the device 218.25.161.161 sends packets to the mapped server (218.25.161.186 as an example. For the three IP addresses 218.25.161.173, 218.25.161.183, and 218.25.161.162 that are directly connected to the vswitch, ARP is automatically executed to report their MAC and IP binding. Of course, the switch can find the corresponding port to send it out. How can we handle messages sent to 218.25.161.186? What is the MAC address corresponding to 218.25.161.186? Run the following command on www.2cto.com on PC (218.25.161.173): As shown in the following figure, the MAP device automatically performs ARP reply for the public IP address mapped by it, and the MAC address is the same; there is no ARP response for public IP addresses that are neither configured nor mapped, such as 218.25.161.185. In this way, all packets sent to the mapped public IP address are sent to the same port by the switch, which is further processed by the MAP device and then forwarded. This is similar to multiple IP addresses of a host, but multiple IP addresses are used for MAP, rather than devices. Author smstong