Is there a way to get the mac addresses and ip of each router connected to a switch?

Question

Like what the title says, is there a way to get the mac addresses and/or ip of all routers connected to a switch in asp.net c#?

If so, is there a way to determine if the connected router is on and off?

The setup of my routers and switch is in the image link.

Answer 1

Managed switches uses SNMP (Simple Network Management Protocol) where you can get information such as the port connection for every port, see here .

Some more information you can get via LLDP (Link Layer Discovery Protocol), see here

I think this should be enough hints. For some work you can use pcap via c#.