[ovs-discuss] question about the OVS-OFCTL

[Asadullah Hussain]

Just a suggestion, Try "dl_type=0x0800" (ethernet packets) in the rule too.
This may help in rule matching too.


On 21 November 2013 05:23, terryxing <xingtianyi at gmail.com> wrote:

> Hi Ben,
>
>
> I have three VMs, I want like this, VM1 ping VM2, duplicate the packets to
> VM3
>
> root at node-35:~# ovs-ofctl add-flow br-int
> "dl_src=VM1,priority=100,actions=NORMAL,mod_dl_dst=vm3_mac_address,NORMAL"
>
> I can use the above command to make the packet first output to normal, and
> then modify the destination mac and output to normal again (reach the
> modified dest_mac). It works fine ! I run tcpdump on VM3 and I saw it
> capture the packet from VM1 to VM2.
>
> But, when I use the IP address  (by changing nw_src nw_dst) to do the same
> thing, the tcpdump on VM3 only shows that
>
> "ARP, request who-has VM2 IP tell VM2IP"
>
>
> Do you know how can I make it work by matching and modifying  IP header
> instead of mac ?
>
> Thanks very much
>
>
> On Tue, Nov 12, 2013 at 10:32 AM, terryxing <xingtianyi at gmail.com> wrote:
>
>> I tried the add-flow command before, and it is just there when I use
>> dump-flows to see the flow table. I am just wondering that if it will just
>> staying there if I keep the OVS running.
>>
>> BTW, the port mirroring works, Thank your so much.
>>
>>
>> On Tue, Nov 12, 2013 at 10:30 AM, Ben Pfaff <blp at nicira.com> wrote:
>>
>>> When you try it, what do you see?
>>>
>>> On Tue, Nov 12, 2013 at 09:56:27AM -0800, terryxing wrote:
>>> > it is okay for the short-lived controller exit, but will the rule last
>>> in
>>> > OVS If I just keep it running ?
>>> >
>>> >
>>> > On Tue, Nov 12, 2013 at 8:00 AM, Ben Pfaff <blp at nicira.com> wrote:
>>> >
>>> > > On Mon, Nov 11, 2013 at 11:23:36PM -0800, terryxing wrote:
>>> > > > What do you mean by short-lived ? How long it can last and can I
>>> save the
>>> > > > flowtable ?
>>> > >
>>> > > Most controllers run until you stop them.  ovs-ofctl connects and
>>> > > executes the command you give it, then exits.
>>> > >
>>>
>>
>>
>
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>


-- 
Asadullah Hussain
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