Cisco VPN Client and L2TP over IPsec impossible?

[Farmoor]

I've tried to get L2TP over IPsec running now for quite som time. The VPN server is a Cisco VPN 3005 Concentrator, and the client is the Cisco Systems VPN Client version 3.6.3(A). A tunnel connection is easily created without L2TP ("pure" IPsec in other words), both with and without certificates. But when I try to get L2TP to work, I get an error message that says:
"Received invalid phase 2 L2TP/IPSec Responder ID payload.
Expected ID: Type 1, Proto 17, Port 1701, Addr 194.xx.xx.xx
Received ID: Type 1, Proto 0, Port 0, Addr 194.xx.xx.xx"

Is it even possible to get L2TP to work with Ciscos VPN Client? I would think so, but am now beginning to doubt that. Please help me if you have any ideas what so ever!
(The reason I want L2TP over IPsec is that it supports more protocols than just IP)

 

[johlang]

Yes, I do think it is possible to run L2TP/IPsec. Perhaps you should check this configuration parameter: make sure you use IPsec in transport mode and not tunnel mode.

 

[Farmoor]

Thank you for the response, but that didn't do the trick. I am using IPsec i transport mode. Anyone else?