VPN Connection site to site Alibaba Virtual Private Cloud
Anyone have idea why "Phase 1 of IKE Tunnel Negotiation Failed" comes up when I try to use IPsec method to establish connection between on-prem and Alibaba Cloud
Solution 1:
IKE negotiates the IPSec security associations, called SAs, between two endpoints. Each security association has parameters that must match on both sides. Verify that you have configured the phase 1 policy with the same parameters for Encryption, Hash, Diffie-Hellman Group and Authentication.
Note: You have left a lot of important details out of your question.