Refer to the exhibit.
Which type of mismatch is causing the problem with the IPsec VPN tunnel?
crypto access list
Phase 1 policy
transform set
preshared key
IKE Message from X.X.X.X Failed its Sanity Check or is Malformed
This debug error appears if the pre-shared keys on the peers do not match. In order to fix this issue, check the pre-shared keys on both sides.
1d00H:%CRPTO-4-IKMP_BAD_MESSAGE: IKE message from 198.51.100.1 failed its
sanity check or is malformed
https://www.cisco.com/c/en/us/support/docs/security-vpn/ipsec-negotiation-ike-protocols/5409-ipsec-debug-00.html#anc17
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