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Every Network Interface Controller (NIC) on the network must be uniquely identified by a MAC address for communications within a network segment. A MAC address is a 48-bit value represented as six octets of two hexadecimal digits. MAC addresses are primarily assigned by device manufactures. The first three octets are the Organizationally Unique Identifier (OUI). The MAC address is normally pre-programmed on the EK-TM4C1294XL LaunchPad board. There is also a sticker on the back of the LaunchPad with the written MAC address. The pre-programmed MAC addresses will have the first three octets equal to 00:1A:B6 which uniquely identifies Texas Instruments. If you have a virgin device then the MAC address is not pre-programmed. You must program the MAC address yourself with the addresses that are allocated to your organization.
There are three tools to read and program the MAC address.