Part of the ping of the private network host is not accessible, and part of the ping can be connected.

ask a question about the connection of linux hosts. There are three hosts in the intranet, An and B can ping each other, C cannot ping A, C can ping B,

where An and B are wired connections to the Internet, the ip is 10.12.41.44 and 10.12.41.151 respectively, and both An and B have only lo loopback addresses and Ethernet network cards such as enp0s31f6. C is the router separated from the intranet to surf the Internet wirelessly, in the form of ip address 192.168.

does anyone know why C can"t ping A? (mainly to download several files from the form of http://xxxx:8080), how to troubleshoot? Thank you

Ping Network

Mar.11,2021

how much is the router IP? Can I visit Amab?
if not, start with the router

I answered my own question and tried to find out what the problem was.

shut down host A (the network is cut off, so A's ip should not be accessible, as I thought at first). Then visit the ip of http://A, find that the management interface of the printer is displayed, and check the network configuration of the printer.

the printer was manually assigned the same ip as host A without my knowledge. Ip, using arping An on host A cannot detect ip conflicts.

anyway, changes the printer's ip address and changes it to DHCP, so that you can connect to host A from C.

by the way, these commands are also used when checking on host B:

arp-an A's ip-sharp View ip,mac address mapping to
arp-da's ip-sharp delete the original mapping

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