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Community Member

CAT6509 MSFCII error message

Hi,

Whilst waiting for feedback from my 'technical representative", I thought I'd run this error message by you guys..

2002 Jul 24 14:38:37 UTC +01:00 %SYS-4-SUPERVISOR_ERR:Forwarding engine IP checksum error counter = 31893

I have two 6509 switches running together in a datacentre. One exhibits this error message, the other doesn't. Both switches are configured with the same config, less the obvious differences.

The error message is written to the logging buffer every 30 minutes exactly.

No other performance concerns are evident.

Anybody had this problem/seen something similar? Any direction would be gratefully received. TAC just says 'contact your technical representative'. Iam seriously hoping that this is not indicative of a hardware problem....

Thanks,

Dave

3 REPLIES
Community Member

Re: CAT6509 MSFCII error message

Dave,

Cisco has a useful tool called 'Error Message Decoder' where you copy and paste error messages into the decoder and it endeavours to explain what is happening. This is located at the following URL:

http://www.cisco.com/cgi-bin/Support/Errordecoder/home.pl

I have pasted your error message into it and it prodcued the following:

1. %SYS-4-SUPERVISOR_ERROR: [chars]/[chars]

This message indicates that the supervisor engine's error counters have incremented. The first [chars] is the counter name and the second [chars] is the counter value ( the 64-bit counters are converted to string format before being printed).

Recommended Action: Contact your technical support representative.

Related documents: No specific documents apply to this error message.

Don't know if this helps any? Maybe it is worth clearing the counters and seeing if the error message disappears?

Good luck,

Dazzler.

Community Member

Re: CAT6509 MSFCII error message

Dave,

Cisco has a useful tool called 'Error Message Decoder' where you copy and paste error messages into the decoder and it endeavours to explain what is happening. This is located at the following URL:

http://www.cisco.com/cgi-bin/Support/Errordecoder/home.pl

I have pasted your error message into it and it prodcued the following:

1. %SYS-4-SUPERVISOR_ERROR: [chars]/[chars]

This message indicates that the supervisor engine's error counters have incremented. The first [chars] is the counter name and the second [chars] is the counter value ( the 64-bit counters are converted to string format before being printed).

Recommended Action: Contact your technical support representative.

Related documents: No specific documents apply to this error message.

Don't know if this helps any? Maybe it is worth clearing the counters and seeing if the error message disappears?

Good luck,

Dazzler.

Cisco Employee

Re: CAT6509 MSFCII error message

The error message that you referenced

SYS-4-SUPERVISOR_ERR:Forwarding engine IP length error counter = xx

indicate that the supervisor dropped so many "bad" packets which has with bad IP length

Here is an example for you

- - - - - - - - - - - - - - - Frame 1 - - - - - - - - - - - - - - - - -

SUMMARY Delta T Destination Source Summary

M 1 [10.0.0.1] [10.0.0.2] IP D=[10.0.0.1] S=[10.0.0.2] LEN=308 ID=0

IP: ----- IP Header -----

IP:

IP: Version = 4, header length = 20 bytes

IP: Type of service = 00

IP: 000. .... = routine

IP: ...0 .... = normal delay

IP: .... 0... = normal throughput

IP: .... .0.. = normal reliability

IP: Total length = 1500 bytes <----- HERE

IP: Identification = 0

IP: Flags = 0X

IP: .0.. .... = may fragment

IP: ..0. .... = last fragment

IP: Fragment offset = 0 bytes

IP: Time to live = 64 seconds/hops

IP: Protocol = 255 (?)

IP: Header checksum = 6021 (correct) <--- Valid Checksum

IP: Source address = [10.0.0.2]

IP: Destination address = [10.0.0.1]

IP: No options

IP: [308 byte(s) of data] <----- HERE

This is a not a good packet and so it is dropped. The same goes for IPX packet. This is the intended behaviour of the 6500 as documented in the following bug

CSCdu25724 - Valid L2 frames with inconsistent IP Total Length are dropped

http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdu25724

You can span who is sending this invalid /incosistent packets and stop or just ignore the message. This message is just a informational message from the switch to

you.

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