I suppose that you installed flows that has ipv6 match/action by
NXTFlowMod, and then retrieve flow stats by ofp_stats_request.
But there is no ipv6 flow while ovs-ofctl shows the ipv6 flow.

If you use OF1.0 with nicira extension, nx_flow_stats_request with NXST_FLOW
should be used. (Or use OF1.2+)

thanks,

On Tue, Mar 19, 2013 at 07:25:02PM +0800, jian lee wrote:
> hello,
> I would like to make a little programme to handle ipv6 flow table with
>  openflow1.0 and nicira extention,just like ofctl_v1_0.py does,the
> programme should have the ability to get,add,modify and delete the ipv6
> flow table,but at the first step,I don't know how to get the ipv6 flow
> table,I had tried using ofctl_rest.py,and only to find the common flow table
> entries,the other flow entries I added with NXTFlowMod() which had ipv6 
> options
> couldn't be shown,but they truly existed,using ovs-ofctl I could find them,so 
> I
> want to know does the nx_match.py have the function which can help me find 
> flow
> entries added with nicira extention,if it doesn't how can I achieve my goal
> with ryu,can you give me some advice,a little example may be better.
> Thanks very much!
> Jian Li 

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