Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: MAC address conflict (wireless) resolved with arp -a

29 Jan 2013   #1

Windows 7 (XP, by Virtualization)
MAC address conflict (wireless) resolved with arp -a

Hi Everyone,

I had a very strange issue when setting up a DHCP reservation on my router. Whilst attempting the setup my Windows 7 computer was reporting one MAC address (both under ipconfig & through a program called Change MAC Address) and my router was reporting another (and NO there weren't other wireless devices connected to the router which I was not aware of!).

I Googled the subject, naturally, and didn't come up with much - however by shear luck I did stumble across a solution - this is what I did!

1). Opened a command prompt
2). Typed "arp -a" (minus the double talking marks) and hit enter
3). Opened Control Panel --> Network & Sharing Center --> Change Adaptor Settings
4). Right clicked on Wi-Fi Adapter & selected properties
5). Double clicked "Internet Protocol Version 4 (TCP/IPv4)"

*** At this point another Properties dialog box opens ***

6). Clicked on OK (didn't change any of the values!)
7). Clicked on OK (again didn't change any values!)
8). Ran the "arp -a" command again
9). Rebooted the Wireless Router & the computer

I did attempt various reboot combinations with the Wireless Router and the laptop before running the "arp -a" command as stated above, however these efforts didn't prove fruitful.

I hope that this helps somebody else out there on the web.

Kind Regards,


My System SpecsSystem Spec

30 Jan 2013   #2

Windows 7 Ultimate x64

Arp command
  -a            Displays current ARP entries by interrogating the current
                protocol data.  If inet_addr is specified, the IP and Physical
                addresses for only the specified computer are displayed.  If
                more than one network interface uses ARP, entries for each ARP
                table are displayed.

  -g            Same as -a.
I'm curious why you think arp -a fixed your issue.

Did you use the change mac progran before this?
My System SpecsSystem Spec

 MAC address conflict (wireless) resolved with arp -a

Thread Tools

Similar help and support threads for2: MAC address conflict (wireless) resolved with arp -a
Thread Forum
Solved windows has detected an IP address conflict Network & Sharing
IP address conflict help required please Network & Sharing
IP address conflict with another system on network. Network & Sharing
Need utility to find where IP address conflict is. Network & Sharing
Belkin USB Wireless G F5D7050 Driver Resolved Drivers
IP address conflict Network & Sharing
Wireless Keyboard/Wireless Mouse Speaker Conflict Hardware & Devices

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 12:41 PM.
Twitter Facebook Google+

Windows 7 Forums

Seven Forums Android App Seven Forums IOS App

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33