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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Problem description: Under certain network conditions we lose connections or are unable to establish connections, The VPN client attempts to connect and then returns “negotiation timout occurred” after around 30 seconds. Network background all of our internet traffic is route across a MAN connection (fiber 10 Mbit) to our co-lo where it passes through our ISA firewall array before reaching the internet. I generally notice issues when the MAN connection is experiencing moderate to traffic. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I have confirmed that the gateway was still working normally using our public wifi which connects to a different internet connection. I also check the load on the isa firewalls and they were running under 5% processor utilization. Our office switch was showing about 30% incoming and 10% outgoing utilization of the 10 Mbit feed.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal>Any suggestions on how I should troubleshoot this? I am fairly familiar with tcp/ip and can do traffic capturing at various points on the network but I am not vary familiar with the ike and ipsec protocols.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have a log and capture of the session from the vpn trace utility which I can provide.<o:p></o:p></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>VPN Client Professional Edition Version 2.2.2 & previous versions<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Tested on Windows 8 x64 running hyper-v role & also on Vista SP2 x86<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Gateway: Unknown, provided by our hosting provider<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>