Interface Reset

I find that there is a interface reset on a switch. Why does it happen ? Is that normal ?


POES1#sh interface gig1/0/3
GigabitEthernet1/0/3 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 381c.1a54.9683 (bia 381c.1a54.9683)
  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:01, 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 131000 bits/sec, 184 packets/sec
  5 minute output rate 1450000 bits/sec, 140 packets/sec
     22281742 packets input, 4883611836 bytes, 0 no buffer
     Received 337610 broadcasts (202041 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 202041 multicast, 0 pause input
     0 input packets with dribble condition detected
     39272907 packets output, 35488600343 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     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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atlas_shudderedSr. Network EngineerCommented:

Interface resets indicate a loss of carrier.  On a LAN interface it could be anything as sinister as a faulting host NIC or cabling to something as simple as the host being shutdown, disconnected or it's NIC being shutdown and brought back up.

If the interface detail above is from the interface in question, I don't think I'd be overly concerned.  There are no other errors on the interface since the switch last reboot.  If you are really worried about it, you could clear the counters on the interface and then check it over a regular interval to see if you can determine when it is happening and then investigate further.


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Typically there is always 1 interface reset present when show interface command is issued. I see it all the time on devices. There is nothing to be worry about.
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