VPN issue on Cisco 7206

Answered Question

Hi Experts,

We have a VPN setup between a Cisco 871 router and a Cisco 7206 VXR router.

The 7206 is a HUB location and the 871 is one of the spokes.

The 871 uses a DSL connection to connect to the internet.

Today we've been getting a large amount of logs on the 7206, logs are as below-

Dec 14 17:47:48.326 est: %CRYPTO-4-IKMP_BAD_MESSAGE: IKE message from <IP> failed its sanity check or is malformed

Dec 14 17:48:57.078 est: %CRYPTO-4-IKMP_BAD_MESSAGE: IKE message from <IP> failed its sanity check or is malformed

Dec 14 17:50:33.191 est: %CRYPTO-4-IKMP_BAD_MESSAGE: IKE message from <IP> failed its sanity check or is malformed

Dec 14 17:51:47.383 est: %CRYPTO-4-IKMP_BAD_MESSAGE: IKE message from <IP> failed its sanity check or is malformed.

Can someone advise if there may be a problem with the DSL connection or if this indicates something else.

I have this problem too.
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