%CRYPTO-6-IKMP_MODE_FAILURE: Processing of Quick mode failed with peer at x.x.x.x I receive this message fairly often on my site to site VPNs. What exactly does this mean? Is this something that should concern me?
Yes my tunnels are up. But the output of sh crypto isakmp sa shows that they are in QM_IDLE for a few minutes, then the conn_id goes to MM_NO_STATE and (deleted). Then the conn_id increments 1, the state goes to QM_IDLE and so on.
Will this slow the throughput of my tunnel?
Does anyone know the fix off the top of their head? Or do I need to run the debug crytpo commands?
It looks like your IKE Phase II (Isakmp) is getting reset randomly. You may want to check your isakmp lifetime setting on both ends.
Are you using IKE keep alives (DPD)? Do you manage both the end of the tunnels? If so, a config example would add greater value to suggest any fix for this problem.
Yes it surely would degrade your performance of the tunnel as the IKE negosiations are happening frequently even after the tunnel establishments. But the data traffic will continue as the the IPsec tunnel is not being removed/reset.
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
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