Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Cisco 2960 input and CRC error

                   input and crc error.jpg

The above is the port status of a problem port , we've connect and Access point to this port . It shows 25650input errors and 8559 CRC error, is it a cabling problem or the port is faulty , what does it means?

Everyone's tags (2)
VIP Purple

Cisco 2960 input and CRC error

Hi Raymond,

1. Please check the port setting on other side (Measn on AP).Both the end of the interfaces should have same speed and duplex settings.

2. Check the phyisical cabling

3. If  switch supports TDR, use the "test cable-diagnostics tdr" command.

4. use this command to clear the error: clear counters FastEthernet0/29


Dont forget to rate helpful posts.


Cisco 2960 input and CRC error

Hi Raymond,

Normally this points to layer 1 issues please check the following:

1. Check the speed/duplex both the ends

2. Check the cable / fiber / trasnceiver
3. Check by changing the speed and duplexto half or Auto
4. Chek if the grounding is proper

5. Check patch panel (if there is one)

Also this is a link for a cable test check it out:

Hope this helps.

Hall of Fame Super Gold

Re: Cisco 2960 input and CRC error

Duplicate posts. 

Go here.

CreatePlease login to create content