Error Message Decode Help Needed

Answered Question
Mar 1st, 2010

I am getting the following error message from two devices on my network:

CRYPTO-4-RECVD_PKT_MAC_ERR: decrypt: mac verify failed for connection id=<removed> local=<removed> remote=<removed> spi=F1E30F16 seqno=0000905D

Cisco decodes the message as:

%CRYPTO-4-RECVD_PKT_MAC_ERR : decrypt: mac verify failed for connection id=[dec]

Explanation   MAC verify processing failed. This may be due to the use of the wrong key by either party during the MAC calculations. Some might consider this a hostile event.

Recommended Action   Contact the peer's administrator.

Can anyone help me understand this?

I've looked in vain for MAC Verify processing, I've also checked for MAC calculations etc...

I need to know what's causing this error, and whether it is a significant problem. The VPN seems to work, but am I losing performance as a result of this?


Thanks

Gareth

I have this problem too.
0 votes
Correct Answer by slmansfield about 6 years 9 months ago

If you have verified that your keys are correct, it seems this might be a bug.

https://supportforums.cisco.com/message/708073#708073

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slmansfield Tue, 03/02/2010 - 12:49

Just FYI, I had the same problem on my 1841 routers and upgraded to the latest release of 12.4(T) and have not had the problem since.

contech-nelsong Tue, 03/02/2010 - 12:54

That's just what I wanted to hear thanks.


The device is scheudled for an up to a new revision, and this will do nicely for me to get the donwtime.


Thanks for your help.

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