[ovs-discuss] internal port problem

[Fang]

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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