CCIE R&S V5.1 Written Exam: Implement and Troubleshoot IPsec with Pre-Shared Key
I will be discussing Implement and Troubleshoot IPsec with Pre-Shared Key as part of Layer 3 Technologies and Fundamental Routing Concepts CCIE Routing and Switching (R&S) V5.1 exam blueprint topics.
Implement and Troubleshoot IPsec with Pre-Shared Key :
4.2.a Implement and troubleshoot IPsec with preshared key
4.2.a [i] IPv4 site to IPv4 site
4.2.a [ii] IPv6 in IPv4 tunnels
4.2.a [iii] Virtual tunneling Interface [VTI]
Let me summarize some of the key takeaways related to CCIE R&S V5.1 Written Exam: Implement and Troubleshoot Static Routing as relevant to CCIE Routing and Switching (R&S) V5.1 written exam blueprint topics.
- “%CRPTO-4-IKMP_BAD_MESSAGE: IKE” message from 188.8.131.52 failed its sanity check or is malformed 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
- In Cisco IOS, the most secure way to protect preshared key is to use secure type 6 format. For security reasons, neither the removal of the master key, nor the removal of the password encryption aes command unencrypts the passwords in the router configuration. Once passwords are encrypted, they are not unencrypted. Existing encrypted keys in the configuration are still able to be unencrypted provided the master key is not removed.
I sincerely hope that you found this article and video helpful. Please post your questions or suggestions in the comments and tell me how you are preparing for your CCIE Routing and Switching (R&S) V5.1 written and lab exams.