Hi

You told about an explicit action called "userspace". What is the ovs-ofctl 
command option ? Is it the same ?

Regards
Jimson

-----Original Message-----
From: "Justin Pettit" <[email protected]>
Sent: ‎21-‎10-‎2015 12:11 PM
To: "jimson jimson" <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [ovs-discuss] User space & kernel space actions.


> On Oct 20, 2015, at 9:10 PM, jimson jimson <[email protected]> wrote:
> 
> Hi
> 
> Are there any user space actions in ovs which can be done only at user space 
> ? Any examples?

Yes, there are a few.  Setting an ARP field can only be done in userspace.

> Is 'normal' action a user space only action?

No, userspace figures out where the packet should go, but the pushes down 
kernel flows to do the forwarding.

> If we have a set of actions to be performed, say a user space action then a 
> kernel space action , will they both be performed at the user space? Or is it 
> like, the kernel throws exception -> ovs does user space action -> packet is 
> given to kernel -> kernel does further processing ?

There's an explicit "userspace" action that acts like an output.  Actions will 
be executed in the order that they're listed, but sending to userspace doesn't 
pause the processing after it.

--Justin


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