Cisco show command explained
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show interfaces
Switch#show interfaces FastEthernet0/1 is down, line protocol is down (disabled) Hardware is Lance, address is 0001.9737.0101 (bia 0001.9737.0101) BW 100000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Half-duplex, 100Mb/s input flow-control is off, output flow-control is off ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:08, output 00:00:05, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue :0/40 (size/max) 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 956 packets input, 193351 bytes, 0 no buffer Received 956 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 0 watchdog, 0 multicast, 0 pause input 0 input packets with dribble condition detected 2357 packets output, 263570 bytes, 0 underruns 0 output errors, 0 collisions, 10 interface resets 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out
- Input Errors - total number of errors, includes runts, giants, no buffer, CRC, frame, overrun and ignored counts
- Runts - discarded packets smaller then protocol allowed, eg. Ethernet frame smaller than 64 bytes
- Giants - discarded packets exceeded protocol allowed size, eg. Ethernet frame grater than 1518 bytes
- CRC - when calculated checksum is not the same as received
- Output Errors - errors that prevented the final transmission of datagrams out of the interface that is being examined
- Collisions - number of frames retransmitted due to Ethernet collisions
- Late Collisions - a collision that occur after 512 bits of the frame have been transmitted