If Ethernet is the only connection to your computer at the time you run getmac. Click the Apple icon in the top-left corner of your screen. In the command prompt window, you can type either getmac or ipconfig /all. Then click Advanced > TCP/IP and you will see your computer’s IP address next to IPv4 Address and your router’s IP address next to Router. (ETA: What if you can't get to the Console port? How do you get the IP address of the switch in order to SSH or (if you must) Telnet in?)Ĭouldn't you just use CDP? #show cdp nei detail will show you the ip of the connected devices. To find out what MAC address the router has got the computer will first put its DNS query on hold in a queue. To find your IP address on a Mac, go to System Preferences > Network and select your connection in the left sidebar. The amazing thing to me is, this far into the 21st Century, this is still the only way I could find to get this information - i.e. Also, 'sh ip arp | i 0/24' will show just the MAC address(es) on that port.) If you're all Cisco, 'show cdp neighbor' (or 'sh cdp nei') will get you to the next switch. Arduino Ethernet Shield connected to the Wi-Fi routers LAN port using an Ethernet cable. Mac OS X Under the Apple menu, select System Preferences Select Network usually in the 3rd row Select a connected network in the left-side menu The IP. (Small tip: When you see a large number of MAC addresses showing up on a single port, there's a switch on that port into which those MAC addresses are connected.

It helps to Ping the subnet's broadcast address (e.g. :^D After beating Google to death over it, hoping for some useful tool, I ended up using exactly the same process (plus the online MAC address lookup to ID the device manufacturer), so I can affirm this works perfectly, if you work it.Īs you can see, the 'sh arp' or 'sh ip arp' commands also give you the MAC addresses, so essentially the 'sh mac add' is only to get the port in which the device is connected. Thanks for posting this *after* I finished a 'What's Connected Where' jihad on our network.

How to get mac from ip