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Webcast-Catalyst9k
New Member

2950 Errors

I have a customer that is experiencing errors on a switch. All switches are Cisco 2950.

On a very regular basis, the link LED for the port flashes orange for a number of seconds (varies from 2 - 20). A print of show logging gives the following:

Syslog logging: enabled (0 messages dropped, 0 flushes, 0 overruns)

Console logging: level debugging, 13903 messages logged

Monitor logging: level debugging, 0 messages logged

Buffer logging: level debugging, 12254 messages logged

File logging: disabled

Trap logging: level informational, 13908 message lines logged

Log Buffer (4096 bytes):

33w3d: %SYS-5-CONFIG_I: Configured from console by vty0 (192.168.120.1)

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

33w3d: %LINK-4-ERROR: FastEthernet0/1 is experiencing errors

I know that it is experiencing errors. My question is, how can I find out what the errors are?

I have tried changing the port and even using a different switch with the same results. I have used a different NIC in the W2K server, but no change.

Thanks in advance.

5 REPLIES
Bronze

Re: 2950 Errors

Try a show int fa0/1 and look at the results.

Did you replace the cable yet?

Also, you could try locking down the port on the switch to full duplex/100 Mbps.

-HTH

New Member

Re: 2950 Errors

Try to avoid auto negotiation, fix the port speed and full duplex manually for the switch port and server NIC card.

New Member

Re: 2950 Errors

Thanks for the prompt reply guys.

Cable was the first thing I tried . No luck.

Port is set for 100Mb full duplex. I have forgotten to set the server NIC to the same (still on auto negotiation I guess).

I'll change that next time on site.

Purple

Re: 2950 Errors

This would probably be fixed if you set the switch to auto , the switch is hardcoded to 100/full and the server is set as auto so it will default to 100/half thus you will have a mismatch along with corresponding errors and slow response issues .

Purple

Re: 2950 Errors

This is speed or duplex mismatches , match both ends for speed and duplex , either auto on both ends or harcode the speed and duplex 100/full etc....

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