Can't Connect to Yosemite VPN Server from Mavericks Clients

Hi All,
I upgraded my Mac Mini Server to Yosemite and none of the Mavericks Clients I have (a 13 inch MBA and a 2010 MM) can connect. However all other machines running Yosemite can connect without issue, this includes another 2010 MM and an 11 inch MBA and all iOS 8+ devices. I've tried deleting and recreating the VPN configuration in the local machines. Anyone else seeing anything like this issue? The Mountain Lion to Mavericks upgrade had a similar issue but I believe that racoon was just broken in that release.
Thanks

Hi Linc,
One of them I am upgrading, the other is a machine I am waiting on a different application to update first prior to upgrading. I am guess I am just a bit frustrated, after the Mountain Lion to Mavericks update I had to call in 4 times and talk my way to enterprise support to get anyone that would even try to assist with Server/VPN. It was the 3rd call that they actually acknowledged an issue- guess I was just attempting to verify if others were seeing this prior to calling in. I don't think its unreasonable to think a server upgrade could support clients like with an OS that is a year old. Just want to make sure I am not "seeing things" when looking at racoon logs and seeing very familiar error messages.
Thanks

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