Assign ip address using mac address

Currently my preferred method if the device isn't listed in Spiceworks: There was a time when I was a baby admin and I didn't want to raise alarms by installing a scanner that I wrote a batch file yes, that long ago that PINGed every IP on a subnet, then immediately ran ARP redirecting output to a text file. But that depends on the device in question being set to respond to PING requests. This does not work for any host on the other side of a router.

Any hosts on the other side of the router will show the routers MAC address. I realize this is an old topic, but someone like myself may be looking for an answer.

I became admin of a network with little over devices, which none of the cabling was mapped. I was told I was responsible for the cabling, so I began looking for a way other than toning out all the cables.

• Add Device > Auto Config IP.
• Using ARP to configure the IP address.
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I was fortunate to have Cisco switches and Windows Server Furthermore I could also get the computer name from DHCP and correlate that to which user was on the machine using PDQ inventory to see who was logged in to the machine. Most of this of course depends on the devices being in use. I am interested in this thread, hopefully someone can help.

Find an ip address from a known mac address

There are 4 types of arp message: So, that being said, is it possible to manually send a rarp request? Sort of a arp based ping? There is arping, but we need rarping Of course, I understand that I can't arp outside my default gateway, but if there is a rarp request, how is it used inside the local network?

Thanks to whatever guru can explain what we're missing. My instance where I found this useful was after updating the firmware on a switch remotely via TFTP, the IP of the switch would change making pinging redundant, obviously. Trying a network scan over Spiceworks or rescanning the single device would not update the IP and I needed an alternate way to find it. This method worked perfectly.

Thank you. Hopefully this helps those trying to understand the purpose of this practice and how it was in-fact useful. I understand the issues in attempting to use a MAC address to locate a device from outside of its local network. The hardware configuration is: The router is connected to Comcast with a Motorola SB modem.

How to find an IP address for a known MAC address in Windows

Comcast assigns a system wide dynamic IP. There is no static IP. On initial setup, a WiFi connection is first established between the thermostat and the router. It is then possible to read or set thermostat values using Total Connect Web pages.

Does anyone understand how this works with Total Connect? This post was extremely helpful, thanks itdownsouth: I used show interface to find MAC addresses on our switches reason for this is poor network documentation and mis-labeled switchports and wall jacks Tedious, but found 5 or 6 now seeing hexadecimal thoughts now though By the way, the reason this is working great for me is the lack of routers -- all switches, so if you have only one subnet like we do, this will do -- otherwise, you will probably need to login to the router or switch on the other side of the router to find MAC address tables on the other networks.

If the computer is unreachable, you may see something like this: PING If you press Ctrl-C , you may see something like this: Again, the exact wording of the message you see may differ from this, depending on your operating system. The Ethernet connection to the computer has been made correctly, and all hubs, routers, etc. To set the new IP address of the network interface which you have obtained from your network administrator, use the ping command and arp command with the -s flag create an ARP entry. In the following procedure, we assume that the MAC address of your network interface is Substitute your values for these addresses when you type in the commands.

From the command line, type: Record the current IP address, subnet mask, and default gateway settings. You will need this information later to return your PC to its original settings. IP address: Subnet mask: Default gateway: Be sure to change it to Enter This displays the embedded web page of the IP Link device.

Click the Configuration tab. Click Submit. The new IP address is written to the device and the web browser connection is immediately lost. The device, with its new IP address, is now ready to be connected to your AV network.

Step 1: Open the command prompt

Return the IP address , Subnet mask , and Default gateway fields to their original settings. If the original PC setting was Obtain an IP address automatically , return to this setting and leave the other fields blank. Global Configurator 3. All rights reserved.