Mac Address To Ip Finder Software

11.08.2020

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Get Mac Address Of Ip Address
Ip To Mac Address Lookup
Mac Address To Ip Finder Software Windows 7
Mac Ip Address Check

As a Network Administrator/Engineer you may be asked to find MAC addresses and/or IP Addresses, hopefully this can make your job a little bit easier. These commands work on most Cisco Switches and Routers but sometimes the commands can vary from device to device.

MAC Address or media access control address is a unique ID assigned to network interface cards (NICs). It is also known as a physical or hardware address. It identifies the hardware manufacturer and is used for network communication between devices in a network segment. MAC Address usually consists of six groups of two hexadecimal digits.
KT-Finder is a stand alone application you can carry with you. Launch application. (IP Link and KT-Finder must be in the same IP range) Select IP Link next to Device. Enter MAC Address and click Connect.

5 Steps total

Aug 10, 2016 MAC IP; Full Form: Media Access Control Address. Internet Protocol Address. Purpose: It identifies the physical address of a computer on the internet. It identifies connection of a computer on the internet. Bits: It is 48 bits (6 bytes) hexadecimal address. IPv4 is a 32-bit (4 bytes) address, and IPv6 is a 128-bits (16 bytes) address.

Step 1: Connect to your Cisco Devices

Connect to the Switch/Router by using a console cable or a terminal emulator like Putty or Secure CRT. If you are successful it should look something like this.

Step 2: Find The MAC Addresses

On the layer 2 device (switch) enter the username and password if needed. Next enter 'enable' mode on the switch by typing enable. Next type the command 'show mac address-table'. If successful it should look like the picture. It's worth noting that on some Cisco devices the command 'show mac-address-table' also works.

Get Mac Address Of Ip Address

Step 3: Find the IP Address

On the layer 3 device ( L3 switch or router) in my case I am using a router, enter the username and password if needed. Next enter 'enable' mode on the router by typing enable. Next type 'show ip arp' if done correctly you should get an output similar to the picture.

Step 4: Filtering the results on a Router

In the example I have provided there were only 9 IP addresses. However in the real world there could be dozens or even hundreds of IP addresses. To help filter the results on a router type 'show ip arp ?' You will see gigabitethernet' as an option this will let you filter results by interface or sub-interfaces. In my exmaple it typed 'sho ip arp gigabitEthernet 0/0.10' and that listed all IP's on my sub-interface.

Step 5: Filtering the results on a Layer 3 Switch

As stated in Step 4, you will likely have more than 9 IP Addresses. This can be made worse in a messy closet with a 48 port switch running the closet and maybe even some layer 2 switches under that. Luckily in addition to being able to filter by interface you can also filter by VLAN. So type in 'show ip arp ?' and you will see 'vlan' as a listed filter. As you can see I typed in 'sho ip arp vlan 20' and it listed only those IP's in vlan 20. In this case it was the vlan interface and a PC.

I hope this guide was helpful for you. If you aren't sure about something or feel like I missed a step, please let me know.

9 Comments

Anaheim
GDBJNC Apr 27, 2018 at 01:15pm
Great post.
Another way to find that information is to first PING the address of the system you are looking for. Then issue:
show arp i .
This will then show you the MAC address associated with the IP address.
Then issue:
show mac address-table i
This will give you the port that the device is currently connected.
Cayenne
Jim6795 Apr 27, 2018 at 01:15pm
Thanks for posting this *after* I finished a 'What's Connected Where' jihad on our network. :^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.
As 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. It helps to Ping the subnet's broadcast address (e.g. '10.1.1.255') to load the ARP table. (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. If you're all Cisco, 'show cdp neighbor' (or 'sh cdp nei') will get you to the next switch. Also, 'sh ip arp i 0/24' will show just the MAC address(es) on that port.)
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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. to find out what's connected where. Did I mention it's a *lot* of work?
(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?)
Datil
CrimsonKidA Apr 27, 2018 at 02:04pm
Good stuff, thanks for posting this! My go-to Cisco command is: show ip interface brief (show ip int bri). Another thing I've learned that is very helpful (I'm still a noob with Cisco stuff) is tab-completion and using a '?' after the start of a command, such as 'show ?'
Cayenne
Ed Rubin Apr 27, 2018 at 03:09pm
Unfortunately dumping the mac table and working through it is the only way to reliably find stuff and identify its switch port. I've done a similar process with HP switches. One thing that helps a lot is an ip scanner application that does MAC vendor ID lookups for you. This can help with jim6795's problem of identifying an undocumented switch IP since you can look for the the switch maker's vendor ID and then try ssh or telnet, or http/https depending on the product.
Jalapeno
TS79 Apr 27, 2018 at 06:53pm
Spiceworks has the ability to harvest this information using SNMP and will create a map showing which device is on which switchport. It must have the correct MIB installed for your switch and you must configure SNMP. The feature could use some more work but basic components are there.
Jalapeno
SadTech0 Apr 27, 2018 at 08:06pm
Thanks for posting this *after* I finished a 'What's Connected Where' jihad on our network. :^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.
As 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. It helps to Ping the subnet's broadcast address (e.g. '10.1.1.255') to load the ARP table. (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. If you're all Cisco, 'show cdp neighbor' (or 'sh cdp nei') will get you to the next switch. Also, 'sh ip arp i 0/24' will show just the MAC address(es) on that port.)
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. to find out what's connected where. Did I mention it's a *lot* of work?
(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?)
Couldn't you just use CDP? #show cdp nei detail will show you the ip of the connected devices.
Thai Pepper
TaylorC Apr 27, 2018 at 08:45pm
Hey everyone thanks for the great feed back, it's really cool having this featured. @SadTech0 if you cant to the console port and you don't know the IP Address you could use a tool like angry IP scanner and find the switch that way. CDP may or may not work depending on your network configuration and/or topology. Barring some major obstruction you should try to console in get the ip and start an inventory. Hope that helps.
Thai Pepper
Todd_in_Nashville Apr 30, 2018 at 12:34pm
Keep in mind, in some security minded environments, CDP may be disable if it's not needed. It's one of those things that give out unnecessary reconnaissance info to the bad guys. If one of your edge routers gets compromised, it can be used to start footprinting your internal network.
Thai Pepper
John3367 Apr 30, 2018 at 08:51pm
Great info.
Another helpful thing you should add!
SHOW INVENTORY ---> To show the SERIAL number of the Cisco device you are on.
**I always use those commands you show to troublshoot. They are very helpful. I usually PING an IP address. then I type a 'show arp' and get its MAC address. then I will type 'show mac-address table' which will show me which PORT the device is connected to!

Tool for finding the MAC address of computers on the network

This tool is an easy way to find the MAC address of a local or remote computer on the network. Select the target and method and find the MAC address of a remote computer on the network.

With Find MAC Address, you can find the MAC address of not only their local or remote computer, but also of any other computer that fits within the specified range of IP addresses. Unlike similar softwares, Find MAC Address can find the MAC addresses of computers using five methods (ARP, NetBios, NetAPI, WMI, SNMP).

The software can not only find the MAC address of a computer, but also lookup the manufacturer of its network card. After selecting one of the four methods and specifying the target, users will obtain all possible information about the MAC addresses.

Key features

Ip To Mac Address Lookup

Getting the MAC address of the local computer.
Getting the MAC address of one remote computer either by its name or IP address.
Getting the MAC addresses of all computers on the network.
Getting the MAC addresses of all computers within the specified range of IP addresses.
Getting the MAC addresses of all computers from the specified computer list.
Five methods for finding MAC addresses (ARP, NetBIOS, NetAPI, WMI, SNMP).
Detecting the manufacturer of the network card by its MAC address.
Detecting the names of network cards (only if WMI or SNMP is used).
Searching the scan results.
Saving the scan results to and loading them from a file in the XML format.
Exporting the network scan results to text files or a Web document.