problemns to reveal my machines

I scan my network lan, Dude I found a few computers, then repeat the scan and some of them I do not find them the most, despite being turned on andfunctioning . (I have not changed anything)

if you enter them manually using ip, sees them, ie I can see statistics like ping, cpu, etc. .. etc. .. but does not give me the tracking map on the Rx, Tx,

how do I add in the map map?

how do I give myself Rx, Tx by computer added manually?

network cards, through the bios there some option Dude wake up in order to help them recognize devices?

help me!! :frowning:

Not sure what the trouble is here but maybe… Check device discovery advanced, put checks in add links and graph link bit rate? Also on every device make sure SNMP is setup and running with a community string.