| Mistake | Why It Fails |
|---------|---------------|
| 00:... | First octet bit 2 = 0 → Globally unique, not allowed. |
| 04:... | Bit 2 = 0 (binary 00000100). |
| 08:... | Bit 2 = 0. |
| FF:... | Broadcast address, invalid for a unicast adapter. |
| 10:... | 10 hex = 00010000 binary – bit 2 is still 0! |
| Using colons/dashes in the Registry | Registry requires raw hex string like 021A2B3C4D5E. |
| Forgetting to disable/enable adapter | Change only applies after a full adapter reset. |
Used: 02:11:22:33:44:55
First octet: 02 (binary 00000010) → Bit 2 = 1 → Locally administered → Success | Mistake | Why It Fails | |---------|---------------|
Follow these steps systematically. The solution is almost always in choosing a valid first octet. | Bit 2 = 0 (binary 00000100)
Let’s get to solutions. Choose the method that fits your technical comfort level. | | FF: