11-25-2008 02:12 PM - edited 03-06-2019 02:40 AM
Hi to all!
I'm having alot of input errors in a Gigabit interface of a catalyst 4500, it is configured as trunk an connected to a catalyst 2960G, in the interface of the 2960G are not any input errors just in the 4500, we already replace the cable between the devices but the situation remains.
CORE1#sh int gi7/45
GigabitEthernet7/45 is up, line protocol is up (connected)
 Hardware is Gigabit Ethernet Port, address is 001b.d403.ffcc (bia 001b.d403.ffcc)
 Description: Trunk SERVERS2-2 0/47
 MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
    reliability 255/255, txload 14/255, rxload 2/255
 Encapsulation ARPA, loopback not set
 Keepalive set (10 sec)
 Full-duplex, 1000Mb/s, link type is auto, media type is 10/100/1000-TX
 input flow-control is off, output flow-control is off
 ARP type: ARPA, ARP Timeout 04:00:00
 Last input 00:00:16, output never, output hang never
 Last clearing of "show interface" counters 4d16h
 Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
 Queueing strategy: fifo
 Output queue: 0/40 (size/max)
 5 minute input rate 10877000 bits/sec, 2163 packets/sec
 5 minute output rate 56541000 bits/sec, 5627 packets/sec
    953098496 packets input, 1206543544279 bytes, 0 no buffer
    Received 664857 broadcasts (354055 multicast)
    0 runts, 0 giants, 0 throttles
    401342 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
    0 input packets with dribble condition detected
    477363643 packets output, 169391220601 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 output buffer failures, 0 output buffers swapped out
Here is the configuration of the two interfaces:
Catalyst 4500
interface GigabitEthernet7/45
description Trunk SERVERS2-2 0/47
switchport trunk encapsulation dot1q
switchport mode trunk
logging event link-status
Catalyst 2960
interface GigabitEthernet0/47
description Trunk CORE1 7/45
switchport mode trunk
media-type rj45
Do you have any idea of what could be causing the input errors?
Thanks in advance for your help.
11-25-2008 02:44 PM
You may be running into oversubscribed ports in the 4500. Remember the 6Gbps threshold per module on this chassis.
Have you tried moving this connection to another switchport and/or module and see if you can duplicate it?
__
Edison.
11-25-2008 02:51 PM
Hi Edison,
I moved it to another switchport but not to another module, I'll try that tomorrow night and see what happen.
I'll post what happen.
Thanks
08-13-2009 02:04 AM
Hi,
I am experinecing the same problem, input errors only on the 4500 side of multiple links to core 6500s. Did you find a resolution to this?
Regards,
Richard.
08-13-2009 06:54 AM
Hi Richard,
The problem was that we were over the 6Gbps threshold per module on the 4500, we moved the connection to another module.
Hope this help.
Regards,
08-14-2009 07:34 AM
Hi,
How did you know you were over the 6Gbps threshold are there counters available to show this?
Regards,
08-14-2009 07:41 AM
Hi,
With a sh inter summary and manually add the RXBS and TXBS value from every interface on the module.
Regards,
08-13-2009 08:59 AM
Quote:
"You may be running into oversubscribed ports in the 4500. Remember the 6Gbps threshold per module on this chassis."
I notice that there are no input/output drops on the interface so I doubt this is an oversubscription case.
What are those input errors??
I bet they are 1504 bytes dot1q frames.
Please paste a:
sh int gi7/45 counters all
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