Cat5500: swBusCRCErrorDrop

[snitram]

Hello,

we get on our Cat5500 the following messages:

%SYS-3-PORT_ERR:Port x/y swBusCRCErrorDrop

Concerning Cisco we should hard code duplex settings, but the are hard coded. Any ideas?

Regards, Snitram

[Prashanth Krishnappa]

What connects to these ports? Are both sides hardcoded? If it is a end workstation, you might want to check the NIC card/driver as well. Check out the following page on CCO

http://www.cisco.com/warp/public/473/180.html#subtopic1l

[snitram]

Hello,

there are workstations and a ISL-Trunk to a router. All ports are on all sides hardcoded. The error message is not constricted to one ore two ports, but they appear on all ports of the module.

Best regards, Snitram

[burleyman]

Do you have any HUBs in your network? If so you need to make sure the duplex is set to half and not full. Also what type of cabling are you running across? If you are running on CAT5 or better speed should not be an issue, however, if you are running on CAT3, then the speed needs to be set to 10MB. Also, if you do have HUBs then make sure what speed they can run at, 10MB or 10/100MB, and that everything connected to them are set accordingly.

Hope this helps,

Burleyman

[ize0213]

No Hubs. Cabeling: CAT5. Everything seems to be connected accordingly.

I have no other idea but hardware-issue, because the messages are comming from all ports of the module.

Best regards, Snitram

[Prashanth Krishnappa]

I did some research and did not find any known hardware issues. Check for any duplex mismatches on all ports especially ISL trunk ports. A mismatch on one single ISL trunk can cause this on other ports due to the following bug

http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw11398

If you still have any issues, I suggest that you open a TAC case

[sd1248]

Hi There,

Is this problem resolved? What actions you took?

We are having similar problem and almost did everything except changing the slot of the Ethernet card.

Thaks in advance.

Sunil

[snitram]

Hi Sunil,

after changing a defective 24-Port 10/100 MBit linecard the problem was resolved. But it was dificult to find out the linecard that was defective :-(

hth

Best regards, Snitram

[sd1248]

Thanks Snitram,

I have already changed Ethernet blade (on the other end also). May be there is a problem in the backplane.

Thanks anyway.

Sunil

[sd1248]

We replaced RSM/VIP combo, and have not received these errors in last 40 hrs. but now we are getting "dmaXferLengthErrors".

Sunil

[snitram]

Hi Sunil,

how often do you get this errors?

Do you have speed/duplex hard coded?

Best regards, Snitram

[sd1248]

Hey Snitram,

We have received 8 "dmaXferLengthErrors" during last 40 hours after replacing the RSM/VIP. Speed/Duplex are already hardcoded on both ends.

Thanks

Sunil

[snitram]

Hi,

http://www.cisco.com/en/US/products/hw/switches/ps679/products_tech_note09186a0080143d13.shtml

Symptom 2: %SYS-3-PORT_ERR:Port 6/23 dmaXferLengthErrors (236)

Generally this message is logged when errordetection is enabled for port counters by issuing the command set errordectection portcounters enable. This command is only useful if a network impacting problem exists. By default, this command is disabled. The code dictates that these counters should be zero, but if they reach a certain threshold, you will off a syslog message. The oversubscription could also be due to a spanning tree loop which could have oversubscribed the port resulting in Direct Memory Access (DMA) queue being full. Disable the errordetection by issuing the set errordectection portcounters disable command and see if the message disappears. After disabling the errordetection counters if you still receive this message, open a case with the Cisco Technical Assistance Center (TAC).

Check the counters; if they do not increment, forget the only 8 messages.

Best regards, Snitram