The switch will need to support doing the encapsulation.  Open vSwitch can do 
VXLAN, GRE, and a few other types of encapsulation, but last I checked, I don't 
think classic IP-in-IP was one of them.  Are you willing/able to switch to 
another type (e.g., VXLAN) or modify Open vSwitch to support your encapsulation?

-- Murphy

On Mar 31, 2014, at 10:54 AM, Ting Xie <tx...@nyu.edu> wrote:

> Hi, 
> 
> I am working on a project where I need to simulate IP-in-IP encapsulation 
> using mininet and POX. The encapsulation part works, but it is very 
> inefficient and slow, since all packets get sent to the controller to get 
> encapsulated/decapsulated. Can you please guide me to a way where only the 
> first new packet is sent to the controller, after which a new rule is 
> installed in the switch to encapsulate/decapsulate the rest of the packets 
> belonging to the same flow? 
> 
> 
> Thanks,
> Best
> Ting

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