In fact, Intel will look at the remaining numbers, the other 24 bits, start at the bottom and incrementing by one, start consuming the other half of the MAC address space. They said, “All right, the first half of this MAC address, the first 24 bits, that’s Intel.” Somebody registers it, in this case Intel. It’s like an address space that’s owned by somebody. It turns out the roundabout answer is the OUI is something that’s owned. If I go back to my command prompt, you’ll notice that they happen to agree because my machine also tells me that MAC address is owned by ‑‑ or manufactured by at least ‑‑ Intel. Go down and notice what it says here, Intel is the OUI, Organizationally Unique Identifier. I’ll paste in here what I copied, the 90e2ba, and find it. I’ll go ahead and use Wireshark OUI Lookup Tool. Let’s take a mental note of that for future reference. If I launch the command prompt and take a look at ipconfig/all, you’ll notice that part of the output right here, shows a physical address. I’ll launch a command prompt on this very box and let’s take a look at what we can find out about it. The OUI is an abbreviation that stands for Organizationally Unique Identifier. Instructor Mark Jacob was presenting a Q&A Session in our ICND1 CCNA class and answered a question regarding MAC Adresses and when they get associated to devices. Replace( '-', ':') Ĭonsole.This post is from our Cisco CCNA Training Course. AddressMatcher( vendorInfoProvider) įoreach ( var ni in System. Var addressMatcher = new MacAddressVendorLookup. Using ( var resourceStream = MacAddressVendorLookup. Get vendor information for current machine's network interfaces var vendorInfoProvider = new MacAddressVendorLookup.

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