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interfaces input errors in 3560 switches

Hello 

recently I had to engage my old 3560 switches in my network awaiting for new switches to be received for the new building.

suddenly I started to receive many complains on about all my 3560 switches 7 switches WS-C3560-24PS connected clients.

when i checked interfaces I found many interfaces input errors.

I have reset interfaces to default and then reconfigured it after clearing error counter and after few days it started again to count input errors.

ports connected to "ip phone + PC data" or pc data only port.

most of these switches are connected through up-links lacp ether-channel to 2960x gig ports as up-links.

hard to think all switches have problems, but easier to think about the passive connectivity.

I want to know why I receive these input errors, is it switch port asic problems or passive connectivity side problem? how

Switch port config sample 

description PC & IPphone
switchport access vlan 10
switchport mode access
switchport nonegotiate
switchport voice vlan 5

mls qos trust device cisco-phone
mls qos trust cos
spanning-tree portfast

show error displayed

3560G-4#sho int | inc error
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 output errors, 0 interface resets
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 output errors, 0 interface resets
26 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 output errors, 0 collisions, 0 interface resets
24 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 output errors, 0 collisions, 0 interface resets
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 output errors, 0 collisions, 0 interface resets
26 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 output errors, 0 collisions, 0 interface resets
25 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 output errors, 0 collisions, 0 interface resets
24 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 output errors, 0 collisions, 0 interface resets
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 output errors, 0 collisions, 0 interface resets
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 output errors, 0 collisions, 0 interface resets
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 output errors, 0 collisions, 0 interface resets

 

3560G-EDGE2#sho int fa 0/1 controller
FastEthernet0/1 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 001a.6c1c.8e83 (bia 001a.6c1c.8e83)
Description: Pc and IP phone
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)
Full-duplex, 100Mb/s, media type is 10/100BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:42, output 00:00:01, output hang never
Last clearing of "show interface" counters 6d01h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 11154
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 63000 bits/sec, 39 packets/sec
5 minute output rate 74000 bits/sec, 78 packets/sec
5776843 packets input, 1376192035 bytes, 0 no buffer
Received 79633 broadcasts (49272 multicasts)
0 runts, 0 giants, 0 throttles
28 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 49272 multicast, 0 pause input
0 input packets with dribble condition detected
21160712 packets output, 3487180641 bytes, 0 underruns
0 output errors, 0 collisions, 0 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

Transmit FastEthernet0/1 Receive
3815056956 Bytes 2804150233 Bytes
7471773 Unicast frames 12446414 Unicast frames
19796750 Multicast frames 105918 Multicast frames
16544246 Broadcast frames 67496 Broadcast frames
0 Too old frames 2748533898 Unicast bytes
0 Deferred frames 11150896 Multicast bytes
0 MTU exceeded frames 6455529 Broadcast bytes
0 1 collision frames 28 Alignment errors
0 2 collision frames 0 FCS errors
0 3 collision frames 0 Oversize frames
0 4 collision frames 14271 Undersize frames
0 5 collision frames 50 Collision fragments
0 6 collision frames
0 7 collision frames 1838898 Minimum size frames
0 8 collision frames 753877 65 to 127 byte frames
0 9 collision frames 9415966 128 to 255 byte frames
0 10 collision frames 139906 256 to 511 byte frames
0 11 collision frames 198724 512 to 1023 byte frames
0 12 collision frames 285384 1024 to 1518 byte frames
0 13 collision frames 0 Overrun frames
0 14 collision frames 0 Pause frames
0 15 collision frames
0 Excessive collisions 0 Symbol error frames
0 Late collisions 0 Invalid frames, too large
0 VLAN discard frames 1372 Valid frames, too large
0 Excess defer frames 50 Invalid frames, too small
5498672 64 byte frames 0 Valid frames, too small
31105579 127 byte frames
3809961 255 byte frames 0 Too old frames
474635 511 byte frames 0 Valid oversize frames
282773 1023 byte frames 0 System FCS error frames
2588867 1518 byte frames 0 RxPortFifoFull drop frame
52282 Too large frames
0 Good (1 coll) frames
0 Good (>1 coll) frames

4 REPLIES 4
Leo Laohoo
VIP Community Legend

Output is not helpful.
Post the complete output to the command "sh interface <PORT> controll" in a text file.

Show added, check up

In 6 days there were "28" input errors? I'm not worried about that.
Total Output Drops, however, is more of a concern.

Ok good, knowing that I have already cleared the counter to follow up with the ports.

anyway, what is the count number that I concern, and why that ?

Thank you.