[ovs-discuss] internal port problem

Fang wchunx416 at 126.com
Mon Mar 18 05:30:45 UTC 2013


Thank you.You have helped me a lot.I will continue to study the documents.








At 2013-03-18 12:55:18,"Jesse Gross" <jesse at nicira.com> wrote:
>I would recommend reading the ovs-ofctl man page for examples.  Your
>description is too vague to be more specific than that.
>
>On Sun, Mar 17, 2013 at 7:46 PM, Fang <wchunx416 at 126.com> wrote:
>> Just want to try.If I use different bridges,VM cannot access to the
>> internet.I am now trying to link the virtual environment into the physical
>> network using OVS.
>>
>>
>>
>>
>>
>>
>> At 2013-03-18 08:46:02,"Jesse Gross" <jesse at nicira.com> wrote:
>>>On Fri, Mar 15, 2013 at 9:06 PM, Fang <wchunx416 at 126.com> wrote:
>>>> At 2013-03-15 23:31:07,"Jesse Gross" <jesse at nicira.com> wrote:
>>>>>On Thu, Mar 14, 2013 at 10:28 PM, Fang <wchunx416 at 126.com> wrote:
>>>>>> Thank you for your reply.I have two more questions.
>>>>>> 1.What's the difference between "internal port" and "fake bridge"?I can
>>>>>> use
>>>>>> "fake bridge" to replace "internal port" in my test.
>>>>>
>>>>>A fake bridge uses an internal port to emulate the vlan model used by
>>>>>the Linux bridge.  Therefore, they are functionally the same but a
>>>>>fake bridge allows the use of bridge commands to manipulate it.  If
>>>>>you don't have existing tools then it is better to not use this
>>>>>compatibility layer.
>>>>>
>>>>>> 2.If I use gre tunnel,i have to add the gre port to the different
>>>>>> bridge
>>>>>> with the host NIC(eth0).Is there any way to put "gre port"
>>>>>> and eth0 on one bridge without causing a loop?
>>>>>
>>>>>You could use OpenFlow rules to completely isolate them.  This
>>>>>basically just creates two bridges within one.
>>>>
>>>> Thank you,but could you give me an example about gre
>>>> my configuration
>>>>  Bridge "br0"
>>>>         Port "br0"
>>>>             Interface "br0"
>>>>                 type: internal
>>>>         Port "tap1"
>>>>             Interface "tap1"
>>>>         Port "eth0"
>>>>             Interface "eth0"
>>>>         Port "gre0"
>>>>             Interface "gre0"
>>>>                 type: gre
>>>>                 options: {remote_ip="192.168.0.156"}
>>>>          ovs_version: "1.7.1"
>>>> do you mean drop the packets from eth0 to gre0?
>>>
>>>It's not really clear what your goal is here in trying to use only a
>>>single bridge, so it's hard to say how to achieve that.
>>
>>
>>
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