[ovs-discuss] add-flow normalization question

YIMIN CHEN ymchen.nbzj at gmail.com
Tue Jul 10 03:05:28 UTC 2012


Hi Reid,

I tried with dl_type specified, now the flow is added correctly. Thank you!

Yimin

On Tue, Jul 10, 2012 at 10:22 AM, Reid Price <reid at nicira.com> wrote:
> Hi Yimin,
>
> You are using nw_dst as a flow match criteria, but nw_dst only makes sense
> in the context of IP.  Try doing
>
>   ovs-ofctl add-flow br0 ip,nw_dst=11.1.1.5,actions=output:3
>
> Note that "ip" is simply shorthand for "dl_type=0x0800".
>
> I've seen this question go through (and be answered) in the archives, but a
> quick google search didn't turn up anything to link to.
>
>   -Reid
>
> On Mon, Jul 9, 2012 at 7:07 PM, YIMIN CHEN <ymchen.nbzj at gmail.com> wrote:
>>
>> Hi,
>>
>> I am experimenting with ovs-ofctl tool to manually add flows to
>> openvswitch1.4.2. I am getting an issue with add-flow that I couldn't
>> figure out what I did wrong.
>>
>> What I ran into is that whenever I tried to add a flow matching an
>> destination IP, that match does not show up in the flow entry. Below
>> is an example of what I did:
>>
>> ymchen at ymchen-lnx:~/ymchen/openvswitch-1.4.2$ sudo ovs-ofctl add-flow
>> br0 nw_dst=11.1.1.5,actions=output:3
>> Jul 10 10:01:06|00001|ofp_util|INFO|normalization changed ofp_match,
>> details:
>> Jul 10 10:01:06|00002|ofp_util|INFO| pre: nw_dst=11.1.1.5
>> Jul 10 10:01:06|00003|ofp_util|INFO|post:  <==== nw_dst is gone!
>>
>> Now if I dump flows, you can see nw_dst=11.1.1.5 is no longer there:
>>
>> ymchen at ymchen-lnx:~/ymchen/openvswitch-1.4.2$ sudo ovs-ofctl
>> dump-flows br0NXST_FLOW reply (xid=0x4):
>>  cookie=0x0, duration=3.18s, table=0, n_packets=0, n_bytes=0,
>> actions=output:3
>>
>> Could anyone shed some light on what I did wrong?
>>
>> Thanks!
>> Yimin
>> _______________________________________________
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>
>



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