On a device first boot, a randomly value is generated and stored. There are several solutions and we going to examine them all.
Sometimes it is required to get the unique ID of android device (phone, tablet, tv, wear) while developing the android application. if needed.How to get Unique ID to identify Android devices Android Note: Option 3-6 can be augmented with additional permission to restrict bandwidth, ACL, VLAN, etc.
User will be able to connect and there are no difference between random MAC and unique MAC User will be prompted but can bypass and gain same level of access as unique MAC User will be able to connect, but user will be asked to login after X # of days User will be able to connect, but after the device goes to sleep and awakes, user will be asked to login again User will be able to connect, but will be redirected to a help page instructing user to disable random MAC feature for this networkīest option, if you do not want random MAC to enter the network. User will not be able to connect to the wireless networkīad experience as there could be many other reasons that user cannot connect to the network Now that ISE can detect the random MAC, here are few options to consider: With this, ISE policy rule can be created using a regular expression match against the RADIUS Calling-Station-ID attribute within the RADIUS Access-Request which includes the client MAC on virtually all Cisco devices: ^.* For a simple rule, any MAC address’ first octet that ends 2,6,A,E would be a random MAC address.
So based on the rule, all of the numbers below would qualify as a random MAC address. Any MAC address that has locally significant bit set as one and is also a unicast address can be considered a random MAC address. As noted in the diagram below, locally significant address 2’s bit of first byte is set to one. The good news is that generation of random MAC follows rules set by IEEE. ISE or wireless authentication system is in a unique position in the network to control the use of random MAC address for the rest of the network. As MAC address as a unique identifier is hard-coded into products and solutions throughout Cisco and 3rd party, which includes MDM/EMM, wireless performance monitoring, and device profiling systems.
The implementations of MAC randomization are different depending on the vendor but here are few examples of the behavior: Microsoft Windows 10 This causes issue on the network elements which relies on MAC addresses to uniquely identify the endpoint or the user behind it.
Fast forward few years, now devices started using random MAC addresses for the association to the wireless networks. By randomizing the MAC address used in the probe request frame, devices were able to hide real MAC address thus providing some level of privacy. In the beginning, the randomization of MAC was used to probe for known wireless networks by the devices. But the way it is utilized has changed since it was first introduced. Mobile endpoints utilizing random MAC address is nothing new.