![]() Last input 00:00:00, output 00:00:00, output hang never Last clearing of "show interface" counters never MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) ARP type: ARPA, ARP Timeout 04:00:00 The router output in Example 4-1 shows the MAC address (00-10-7b-3a-92-3c) of an Ethernet interface.Įxample 4-1 Router Interface MAC Address router> show interface ![]() The MAC address is 48 bits in length (6 octets) and is represented in hexadecimal. It is an implementation of Layer 2 of the OSI reference model-or more specifically, the MAC layer of the IEEE model to identify the station. This is the MAC address, which is also called the physical address. Ethernet or Token Ring router interfaces and all device network interface cards (NICs) are identified with a unique burned-in address (BIA).
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