[pox-dev] nw_proto not getting added in the flow

[Jayanth Silesh]

Hi Murphy,

Also, is there a way to match metadata field and write metadata without using the nicira extensions.
Thanks,
Jayanth 
Graduate Student
USC


On December 6, 2013 at 10:55:46 AM, Murphy McCauley (murphy.mccauley at gmail.com) wrote:

I am pretty sure this code will cause an exception, since I don't think the attributes you're setting on the match correspond to NXM types. Does it not?  

See inline...  

On Dec 5, 2013, at 4:27 PM, Jayanth xForums <jayanthsileshs.forums at gmail.com> wrote:  

> Hi All,  
>  
> I have written a small pox as follows but in the OVS 2.0 it does not add the nw_proto in the flow table.  
>  
> The pox code is as follows:  
>  
> # Turn on Nicira packet_ins  
> msg = nx.nx_packet_in_format()  
> event.connection.send(msg)  
>  
> # Turn on ability to specify table in flow_mods  
> msg = nx.nx_flow_mod_table_id()  
> event.connection.send(msg)  
>  
> msg1 = nx.nx_flow_mod()  
> #msg1.match = nx.nx_match()  
> msg1.match.of_dl_type = pkt.ethernet.IP_TYPE  

Try .eth_type = pkt.ethernet.IP_TYPE  

> #msg1.match.nw_proto = pkt.ipv4.TCP_PROTOCOL  
> msg1.match.of_nw_proto = 6  

Try .ip_proto = 6  

> msg1.actions.append(nx.nx_action_resubmit.resubmit_table(table = 1))  
> event.connection.send(msg1)  
>  
>  
> Thanks,  
> Jayanth  
> Graduate Student  
> USC  


Alternately, instead of using nx_flow_mod, use ofp_flow_mod_table_id, which is just like a normal ofp_flow_mod except with a table_id.  

-- Murphy
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