One of the switches in my network, there is more than one interface has a lot of collisions. May I know it could be effect the switch or is it a normal situation? I also attach one of the interface’s information. I really appreciate any advice.
FastEthernet0/23 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0018.1904.8217 (bia 0018.1904.8217)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Half-duplex, 100Mb/s, media type is 100BaseFX
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 12w4d
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 148000 bits/sec, 29 packets/sec
5 minute output rate 21000 bits/sec, 27 packets/sec
121642981 packets input, 2246753017 bytes, 0 no buffer
Received 183 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
124977329 packets output, 2804069558 bytes, 0 underruns
14018 output errors, 271824 collisions, 0 interface resets
0 babbles, 14018 late collision, 419821 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
100BaseFX can also be half-duplex. Some hubs used that many years ago. If you think about, even copper ethernet has separate wires for TX and RX, in that there is no difference from fiber.
And the errors are not even that many, one each 8500 good packets approx.
But in any case, the best thing is to set the devices in full-duplex.