3550 CRC errors

[jw]

I continulaay get input CRC errors on my 3550 only when I connect to routers (2621). I have changed ports on both the 3550 and 2621 and changed the cable, but still get the CRC errors.

Config is below

Any help is appreciated -

Jeff

3550 config

!

interface FastEthernet0/2

no switchport

ip address 209.3.59.9 255.255.255.252

duplex full

speed 100

!

2621 config

!

interface FastEthernet0/1

ip address 209.3.59.10 255.255.255.252

speed 100

full-duplex

!

[neclink]

It seems like the problem is not on the interface, but a host on your lan is generating the bad packets. also you will need to examine the entire config to really determine the actual source of problem.

kaash

[jw]

Turns out to be an interoperability issue between the 3550 and 26xx routers. If directly connected, there are CRC errors on data coming from the 2600 to the 3550. If I place a hub between the 3550 and 2600, the errors disappear. Cisco support now has the issue

Thanks

Jeff

[pushkar1782]

hey check out the cable ..crimp the cross cable again....bcoz when u connected thru hub u changed the cable from cross to straight its working now..but if u put back original cross cable its not working ..this means cable problem ..crimp the cable with AT & T standard .....it will work definitely ...

do tell the results

[jw]

The issue was resolved by Cisco support yesterday. Turned out to be a CDP problem with the 3550 when connectied to a 26xx router. Per Cisco Support it is bug CSCef71702 and resolved in 12.2(35)SEA

Thanks to all who provided things to look at

Jeff

[Erick Bergquist]

Did the CRCs go away when you upgraded?

[jw]

Since CDP is not a big issue, we have not upgraded yet, but will during our next maintenance cycle. As long as we have CDP off, there are no errors

Jeff