[ovs-discuss] How to create mirror packet over GRE on OVS+DPDK

Guoshuai Li ligs at dtdream.com
Mon Sep 25 06:14:43 UTC 2017


You can catch packets on your management interface.


I guess your package sent to the userspace from vm by dpdk , and then 
through the tunnel to return to the kernel.

I do not know if this will be a problem.


I suggest you can try your management interface using OVS bridge with 
dpdk, such as "g1".


This is my configuration:

7: br-agg: <BROADCAST,PROMISC,UP,LOWER_UP> mtu 1600 qdisc pfifo_fast 
state UP qlen 1000
     link/ether 6c:92:bf:04:f9:18 brd ff:ff:ff:ff:ff:ff
     inet 10.157.145.213/24 brd 10.157.145.255 scope global br-agg
        valid_lft forever preferred_lft forever
     inet6 fe80::6e92:bfff:fe04:f918/64 scope link
        valid_lft forever preferred_lft forever

[root at gateway1 ~]# ovs-vsctl show
b99b043b-951b-4bc7-9fd7-329d60d443a5
     Bridge br-agg
         Port bond-agg
             Interface "agg-dpdk-2"
                 type: dpdk
                 options: {dpdk-devargs="0000:02:00.1"}
             Interface "agg-dpdk-1"
                 type: dpdk
                 options: {dpdk-devargs="0000:02:00.0"}
     Bridge br-int
         Port "ovn-d172cc-0"
             Interface "ovn-d172cc-0"
                 type: geneve
                 options: {csum="true", key=flow, 
remote_ip="10.157.145.212"}
         Port br-int
             Interface br-int
                 type: internal
         Port "ovn-d131e4-0"
             Interface "ovn-d131e4-0"
                 type: geneve
                 options: {csum="true", key=flow, 
remote_ip="10.157.145.214"}
         Port "ovn-844fcd-0"
             Interface "ovn-844fcd-0"
                 type: geneve
                 options: {csum="true", key=flow, 
remote_ip="10.157.145.211"}




> Hi
>
> thank for your reply.
>
> the 192.1.2.159 is actually on the same subnet of the management
> interface, it is not part of the OVS bridge.
>
>
>
> On Mon, Sep 25, 2017 at 1:37 PM, Guoshuai Li <ligs at dtdream.com> wrote:
>> I think you may have caught the tunnel inner package.
>>
>> Is the tunnel outbound from interface dpdk0? how about caught dpdk0 with
>> mirror?
>>
>> Or use dpdk-pdump?
>>
>>> Hi
>>>
>>> How do I configure mirroring of all traffic to a GRE tunnel on OVS+DPDK?
>>>
>>> I have a OVS+DPDK setip as below.
>>>
>>> # ovs-vsctl show
>>> 9fe3ef4d-7f29-4a21-80ea-62a705f5d934
>>>       Bridge "g1"
>>>           Port "g1"
>>>               Interface "g1"
>>>                   type: internal
>>>           Port "dpdk0"
>>>               Interface "dpdk0"
>>>                   type: dpdk
>>>                   options: {dpdk-devargs="0000:00:09.0"}
>>>
>>> I tried to create gre tunnel for packet mirroring
>>>
>>> #ovs-vsctl add-port g1 gre0 -- set interface gre0 type=gre
>>> options:remote_ip=192.1.2.159 -- --id=@p get port gre0 -- --id=@m
>>> create mirror name=m0 select-all=true output-port=@p -- set bridge g1
>>> mirrors=@m
>>>
>>> I cannot find any packet arrive on 192.1.2.159, any idea?
>>>
>>> I have tried to use the same command in an OVS setup without DPDK
>>> enabled, it works.
>>>
>>> please help
>>>
>>> - RBK
>>>
>>>
>>> On Mon, Sep 25, 2017 at 1:26 PM, Sun Paul <paulrbk at gmail.com> wrote:
>>>> Hi
>>>>
>>>> How do I configure mirroring of all traffic to a GRE tunnel on OVS+DPDK?
>>>>
>>>>
>>>> I have a OVS+DPDK setip as below.
>>>>
>>>> # ovs-vsctl show
>>>> 9fe3ef4d-7f29-4a21-80ea-62a705f5d934
>>>>       Bridge "g1"
>>>>           Port "g1"
>>>>               Interface "g1"
>>>>                   type: internal
>>>>           Port "dpdk0"
>>>>               Interface "dpdk0"
>>>>                   type: dpdk
>>>>                   options: {dpdk-devargs="0000:00:09.0"}
>>>>
>>>> I tried to create gre tunnel for packet mirroring
>>> _______________________________________________
>>> discuss mailing list
>>> discuss at openvswitch.org
>>> https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
>>



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