Dear all,
this is about 3 switches 2950-48-EI having errors at the GBIC ports (WS-G5483) They are arranged in a triangle (MDF1, MDF2 and MDF3) using their Gigabit links. SpanningTree blocks one of the Gbic ports at MDF3.
Now, MDF1 and MDF3 display Gbic errors similar to the ones below but MDF2 is clean. I have already tried all this without any success:
- replacing all 3 cables in the triangle
- made sure links are 1000/Full on both sides
- set link to 'access' (they were trunk 'before')
- upgrading IOS (now is 12.1(20)EA1)
anyway, errors are still there. Please find details below:
# show controllers ethernet-controller gigabitEthernet 0/2
Transmit
4286198868 Bytes
16349702 Frames
414256 Multicast frames
781252 Broadcast frames
0 Pause frames
0 Single defer frames
0 Multiple defer frames
0 1 collision frames
0 2-15 collisions
0 Late collisions
0 Excessive collisions
0 Total collisions
0 Control frames
0 VLAN discard frames
0 Too old frames
0 Tagged frames
0 Aborted Tx frames
Receive
3699419955 Bytes
15538117 Frames
6106 FCS errors
13818 Multicast frames
356520 Broadcast frames
0 Control frames
0 Pause frames
0 Unknown opcode frames
0 Alignment errors
0 Length out of range
6450 Symbol error frames
0 False carrier errors
0 Valid frames, too small
0 Valid frames, too large
321 Invalid frames, too small
22 Invalid frames, too large
0 Discarded frames
Transmit and Receive
6474382 Minimum size frames
5604719 65 to 127 byte frames
9264325 128 to 255 byte frames
1075111 256 to 511 byte frames
546105 512 to 1023 byte frames
8922834 1024 to 1518 byte frames
0 1519 to 1522 byte frames
#sh int gi 0/2
GigabitEthernet0/2 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 000b.fd94.8eb2 (bia 000b.fd94.8eb2)
Description: MDFSwitch3
MTU 1500 bytes, BW 1000000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
1000BaseT module in GBIC slot.
Last input 00:00:10, output 00:00:01, output hang never
Last clearing of "show interface" counters 3d14h
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 1388000 bits/sec, 341 packets/sec
5 minute output rate 2540000 bits/sec, 396 packets/sec
15877541 packets input, 3844248416 bytes, 0 no buffer
Received 371206 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
6271 input errors, 6249 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 13866 multicast, 0 pause input
0 input packets with dribble condition detected
16776738 packets output, 353897391 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
*** Any ideas will be much appreciated !!! ***
