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Mon, Jun 19, 2023 10:17 pm

Checking and setting the port speed on a Cisco switch

You can check the port speed on a Cisco network switch from its command-line interface (CLI) by logging into the switch and then issuing the show interface command. If you want to see the parameters, including port speed, for all ports on the switch, the command without any additional command line arguments will display information for all the ports on the switch. If you are only interested in the rate for a particular port, then specify it after the command. E.g., show interface fa0/1.

Hadrian>show interfaces fa0/1
FastEthernet0/1 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 0009.e897.d281 (bia 0009.e897.d281)
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
     reliability 255/255, txload 32/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 10Mb/s, media type is 100BaseTX
  input flow-control is unsupported output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:00, 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 72000 bits/sec, 29 packets/sec
  5 minute output rate 1286000 bits/sec, 728 packets/sec
     686444 packets input, 756803225 bytes, 0 no buffer
     Received 6 broadcasts (0 multicast)
     0 runts, 0 giants, 0 throttles
     4 input errors, 4 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     1626390 packets output, 293258140 bytes, 0 underruns
     0 output errors, 0 collisions, 2 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

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