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Failure in negotiate progress IPsec phase 2

I have Fortigate v6.4.5, and my peer has Cisco. I have setup an IPSec Tunnel, and I have repeatedly checked the settings, they are the same. Phase1 is up but Phase2 isn't up and it keeps giving error in negotiating progress IPsec phase 2. 


Esteemed Contributor III

You need to run "IKE debugging". That would tell you, or imply you, what part of phase2 either of them didn't like.

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