RedHat-based Linux users can view their MAC address by executing “ip addr” and looking for the line labeled “link/ether”.Īs mentioned previously, MAC addresses can be spoofed (imitated/forged). If the "ifconfig" command fails, then try executing the command with Root privileges. Alternately, type "ifconfig | grep HWaddr". The MAC address will be in hexadecimal form (00:00:00:00:00:00). To find the MAC address, look for the value labeled "HWaddr". The command will list all NICs on the system and list various information for each one. The IEEE trademarked EUI-64.ĭebian-based Linux users can obtain their MAC address by typing "ifconfig" in a command-line. EUI-64 is an improved type of MAC address for IPv6. People can check a MAC address by using one of these "MAC address lookup" sites -įUN FACT: IPv6 NICs use EUI-64 (Extended Unique Identifier) instead of the 48-bit (12-hex digits) MAC address. People can identify the manufacturer of a NIC by its MAC address since the IEEE assigns a MAC address range to each manufacturer. Since virtualization does not use real hardware (besides the host's hardware), it is possible to create two virtual machines with a specific MAC address or randomized.
However, virtualization can be used to create virtual networks among virtual systems. MAC addresses are assigned by the manufacturer and stored on the NIC's hardware. Duplicate/conflicting MAC addresses may be caused by manufacturer mistakes/errors or spoofing. If so, those two NICs will have conflicts and problems on the network. However, some people may find two NICs with the same MAC address. MAC addresses are supposed to be unique among every NIC. NOTE: A MAC address may also be called a hardware address, Ethernet hardware address (EHA), burned-in address (BIA), or physical address. When using Linux, there are some special commands that users may benefit from learning such as viewing their MAC address or changing it. When using any type of operating system on a network, it helps to understand the concepts and ideas of MAC addresses. MAC addresses are used by most IEEE-802-compliant networks as an address for each NIC. A MAC address is a unique twelve-hex-digit (48 bits) fingerprint/identifier for network interface cards (NICs). A MAC address (media access control address) is very important in the field of computer networking.
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