How to disable random MAC address in Windows 7

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• Hi,

  When i goto Network and sharing center & click on Show Full Map, the computer issues a random mac address.

  The switch is configured to block unauthorized mac addresses. Due to this the port is blocked and the user has no access to the network.The MAC coming up in the logs of the switch is different than the actual MAC address.

  The drivers are updated.

  Cisco switch is being used without NAC.
  The Network Card is of Intel 82566DM-2.LAN Switch LOG capture details :
  Nov 17 11:18:28.011 IST: %PM-4-ERR_DISABLE: psecure-violation error detected on Gi4/14, putting Gi4/14 in err-disable state
  Nov 17 11:18:28.015 IST: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 000d.3adb.8600 on port GigabitEthernet4/14.
  Nov 17 11:18:29.011 IST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet4/14, changed state to down.

  This issue is there in Windows 7 only have checked a Vista machine for this issue and it is working fine. The MAC address which is coming up in the logs is of Microsoft. I checcked it on this website. http://www.techzoom.net/lookup/check-mac.en .

  • Edited by Wednesday, December 2, 2009 3:38 PM mistake

There's two controls for using random hardware addresses—one is for all Wi-Fi networks and the other is for the specific Wi-Fi network you choose. When you turn it on for all networks, random hardware addresses are used while your PC scans for networks and connects to any network. When it's turned on for a specific network you choose, random hardware addresses are used the next time you connect to that network.

Use random hardware addresses for all networks:

1. Select the Start button, then select Settings > Network & Internet > Wi-Fi .

2. Turn on Use random hardware addresses.

Use random hardware addresses for a specific network:

1. Select the Start button, then select Settings > Network & Internet > Wi-Fi > Manage known networks.

2. Choose a network, then select Properties and choose the setting you want under Use random hardware addresses for this network.

Why use random hardware addresses?
Open Wi-Fi

MAC Randomization creates a random MAC address when joining a Wi-Fi network for the first time or after “forgetting” and rejoining a Wi-Fi network. It Generates a new random MAC address after 24 hours of last connection.

To ensure optimization of your HomePass® app features, you may want to consider disabling MAC Randomization on your devices. It is done on a per SSID basis so you can turn off the randomization for your home SSID but allow it to function for hotspots outside of your home.

To Disable MAC Randomization on iOS Devices:

1. Open the Settings on your iPhone, iPad, or iPod, then tap Wi-Fi or WLAN
2. Tap the information button next to your network
3. Turn off Private Address
4. Re-join the network

To Disable MAC Randomization on Android Devices:

1. Open the Settings
2. Tap Network & Internet -> Wi-Fi
3. Tap the gear icon associated with your network
4. Tap MAC address type
5. Tap Phone MAC
6. Re-join the network

If you are still having trouble, contact us. We're here to help!

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