CRC errors on cisco switch

[Srinivas N]

Dear All,

One of my wi-fi site having 2nos cisco 2950 switchs. in that network some D-link unmanageble swithes also there

and access points also connected to cisco switchs and D-link switchs.

after one or two days i am not able to connect the wi-fi, then i need to restart the access point then only wi-fi is working fine.

I upgraded the latest ios also.

I connected some access points to the cisco switch ports, those ports are showing crc error messages like below.

145 input errors, 144 CRC, 1 frame, 0 overrun, 0 ignored

and log file also show some errors like below.

000186: Jun 23 03:44:01: %SYS-5-CONFIG_I: Configured from console by vty0 (115.1

19.187.45)

000187: Jun 23 05:44:36: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/5, changed state to down

000188: Jun 23 05:44:38: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/5, changed state to up

000189: Jun 23 06:38:19: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/5, changed state to down

000190: Jun 23 06:38:21: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/5, changed state to up

000191: Jun 23 06:38:25: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/5, changed state to down

000192: Jun 23 06:38:27: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/5, changed state to up

what could be the problem,

I updated the lates IOS and changed the RJ45 connector both side.

Plz help on this.

Thanks,

Srinivas. N.

[Leo Laohoo]

How to use Time-Domain Reflectometer (TDR)
https://supportforums.cisco.com/docs/DOC-18983

Nice one Jimmy!

LOL

[jimmysands73_2]

I will admit, I do not have it bookmarked...lol. But google produced it quite easily.....

[pjmonline]

Sorry if I missed it but what brand and model of access point are these?

Sent from Cisco Technical Support iPhone App

[Parvesh Paliwal]

is there any logs on the WAP side?

try to connect the device directly using a small  (1 meter or so ) cable.