Trying some ARP workaround (configure a static ARP entry on the PC like 192.168.2.2 for the switch's MAC) won't help because you'd get the switch to receive the frame and extract the IP packet, but since the destination IP isn't local it'd be ignored (a layer-3 switch would even try to forward the packet).ĭNS doesn't help here. Alternatively, the switch could have another routable IP address and there's a router willing to forward in between. Either the PC needs to have an (additional) IP address within 169.254.0.0/16 or the switch needs to have an IP address within (assuming) 192.168.2.0/24. How would I be able to open an SSH connection with the device knowing only it's MAC adress? If you've configured the switch as a DHCP server then you will need to configure a static address.

If you've configured the switch as a DHCP client then your DHCP server isn't working. This means that these two cannot talk to each other - they're both part of different IP networks and there's no router in betweeen (which isn't possible because of the unroutable .y address). ARP is intended for use by system administrators and is not generally useful as a way to track down computers and people on the Internet.On PC, the extra network adapter is configured as static 192.168.2.1.Ī switch with DHCP enabled is connected to 192.168.2.1 and if I login using the console (RS232) I see that it has .x source: link-local, MAC: xx:xx. ARP works only within the small group of computers on a local area network (LAN), though, not across the Internet. Using 'arp,' you can in fact determine the MAC address of some computers from their IP address. In Windows, Linux and other operating systems, the command line utility 'arp' shows this information. Most computers allow you to see the list of IP and MAC addresses that ARP has collected there. Using ARP, each computer maintains a list of both IP and MAC addresses for each device it has recently communicated with. The technology called ARP - Address Resolution Protocol included with TCP/IP makes it possible. However, computers connected to the same TCP/IP local network can determine each other's MAC addresses. Simply stated, a computer's own hardware configuration determines its MAC address while the configuration of the network it is connected to determines its IP address. These two addresses originate from different sources. It is usually not possible for a person to get the MAC address of a computer from its IP address alone.

How to get ip address from mac address