You are troubleshooting a problem related to IPsec connectivity issues. You see that there is no ISAKMP security association established between peers. You debug the connection process and see an error message of 1d00h: ISAKMP (0:1): atts are not acceptable. Next payload is 0. What does this message indicate?
This indicates a policy mismatch.
This indicates that the offered attributes did not contain a payload.
IKE has failed initial attempts and will resend policy offerings to the peer router.
The time stamp of the message shows that it is one day old. This could indicate a possible mismatch of system clocks and invalidate the connection attempt.
Want to practice for 642-637 - Securing Networks with Cisco Routers and Switches (SECURE) v1.0 ?