After installing SP 1 on my 2008 R2 VPN Server IKEv2 VPN connections broke. The conneting computer gets Error 13863: Invalid Situation. Windows Server Event Log shows:
CoId={HEX STRING}: The following error occurred in the Point to Point Protocol module on port: VPN1-79, UserName: DOMAIN\user. Invalid situation
Rollback SP1 fixes this issue. I recommend not installing SP1 on any RRAS VPN server using IKEv2 until MS fixes. Other users have reported same issue.
