Mac Address Assignment

Mac Address Assignment-59
While I was testing I used MACs in the space ::xx , but now we need to assign final MACs. represents any bit in the mac address, and X is the U/L bit and Y is the Uni/multi cast bit If the the eighth bit of a MAC address is 1, devices may have trouble getting IP addresses using DHCP.The question here is that the company that pays the project dont want to buy OUI mac space. If the eighth bit of a MAC address is 0, you may have more luck.Therefore, when the bit is inverted, it maintains its original scope (global unique address is still global unique and vice versa).

While I was testing I used MACs in the space ::xx , but now we need to assign final MACs. represents any bit in the mac address, and X is the U/L bit and Y is the Uni/multi cast bit If the the eighth bit of a MAC address is 1, devices may have trouble getting IP addresses using DHCP.The question here is that the company that pays the project dont want to buy OUI mac space. If the eighth bit of a MAC address is 0, you may have more luck.Therefore, when the bit is inverted, it maintains its original scope (global unique address is still global unique and vice versa).

They say that is it practically impossible to have 2 cards in the same network with the same MAC address. The 7th and 8th bit of MAC addresses are special: Bit 8 == 0 for unicast Bit 8 == 1 for multicast Bit 7 is also special - 0 = globally unique (assigned to a manufacturer to use) and 1 = locally administered (we should use these addresses!

Another reason that they are telling me is that they will use this ethernet device card in places where no more ethernet device except a WIFI router and maybe more of our cards would be connected.

The 16-bit 0x FFFE is then inserted between these two 24-bits for the 64-bit EUI address.

IEEE has chosen FFFE as a reserved value which can only appear in EUI-64 generated from the an EUI-48 MAC address.

This means another address is needed for your router to correctly forward data to each individual device on your network.

Each device on your network has a unique MAC address.

PCs, laptops, smartphones, tablets, smart devices, games consoles - to name a few.

When their devices connect to the internet, websites and online services must communicate with them using their public IP address.

Next, the seventh bit from the left, or the universal/local (U/L) bit, needs to be inverted.

This bit identifies whether this interface identifier is universally or locally administered.

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