[ovs-discuss] gre tunnel create problem

faicker mo faicker.mo at gmail.com
Wed Jun 6 02:18:13 UTC 2012


I am happy to share my configuration.
2 hosts, 
192.168.1.100     eth0
192.168.1.101	eth0
Each has a vm. We config the vm in the same subnet.
We shouldn't add the eth0 on bridge. The bridge likes this:
br0:  vnet0
add the gre tunnel on br0:
ovs-vsctl add-port br0 gre0 -- set interface gre0 type=gre options:local_ip=192.168.1.100 remote_ip=192.168.1.101

The gre0 port should exist in "ovs-dpctl show" and "ovs-vsctl show".
Do the similar thing on 192.168.1.100.

Now,you can ping from each vm.


On 2012-6-6, at 上午1:12, ravi kerur wrote:

> Faicker,
> 
> Can you share your configuration with general public so everyone can
> benefit from it. At least I am having similar issues and still not
> working correctly. In your case have you setup flows using ovs-ofctl
> to match certain tunnel parameters?
> 
> Thanks,
> Ravi
> 
>> 
>> 
>> 
>> From: discuss-bounces at openvswitch.org
>> [mailto:discuss-bounces at openvswitch.org] On Behalf Of faicker mo
>> Sent: Tuesday, June 05, 2012 6:49 AM
>> To: Ben Pfaff
>> Cc: discuss at openvswitch.org
>> Subject: Re: [ovs-discuss] gre tunnel create problem
>> 
>> 
>> 
>> I solved it.
>> 
>> I compile the 1.4.1 source files, and used the openvswitch.ko module to
>> replace the default kernel module in linux 3.3.7.
>> 
>> Now, it's OK. Only this command is enough:
>> 
>> ovs-vsctl add-port br0 gre0 -- set interface gre0 type=gre
>> options:remote_ip=192.168.1.101
>> 
>> 
>> 
>> 
>> 
>> On 2012-6-4, at 下午6:59, faicker mo wrote:
>> 
>> 
>> 
>> I have to edit this  because the port is wrong. Sorry for my modifying the
>> log.
>> 
>> the port is netvm and linux creates a default port named gre0.
>> 
>> 
>> 
>> On 2012-6-4, at 下午6:54, faicker mo wrote:
>> 
>> 
>> 
>> I'm sorry, I have another question following this.
>> 
>> When I added the gre tunnel port on bridge, some errors occurred:
>> 
>> ---------------------------------
>> 
>> 56 Jun  4 18:33:42 archlinux ovs-vswitchd: 00062|dpif|WARN|system at br0:
>> failed to add gre0 as port: Invalid argument
>> 
>>  57 Jun  4 18:33:42 archlinux ovs-vswitchd: 00063|bridge|WARN|netvm port has
>> no interfaces, dropping
>> 
>>  58 Jun  4 18:33:42 archlinux ovs-vswitchd: 00064|bridge|INFO|destroyed port
>> netvm on bridge br0
>> 
>>  59 Jun  4 18:33:42 archlinux ovs-vswitchd: 00065|bridge|WARN|bridge br0:
>> using default bridge Ethernet address b6:8b:ef:f1:d6:41
>> 
>> --------------------------
>> 
>> Though the tunnel works. I found this because the tunnel port didn't appear
>> in the "ovs-dpctl show" result.
>> 
>> 
>> 
>> 
>> 
>> On 2012-6-2, at 上午5:17, Ben Pfaff wrote:
>> 
>> 
>> 
>> I was thinking that we should document it alongside each place where we
>> mention a feature.  For example, in ovs-vswitch.conf.db(5) we would
>> mention support for GRE in the same place that we describe GRE.
>> 
>> On Fri, Jun 01, 2012 at 02:15:56PM -0700, Justin Pettit wrote:
>> 
>> I was thinking the same thing.  Do you think we put it in the website
>> 
>> FAQ or a document in the repo?
>> 
>> 
>> 
>> --Justin
>> 
>> 
>> 
>> 
>> 
>> On Jun 1, 2012, at 2:14 PM, Ben Pfaff wrote:
>> 
>> 
>> 
>> We need to document which features work with the upstream kernel module
>> 
>> and which only with the separate one.  So far I don't think we do that.
>> 
>> 
>> 
>> On Fri, Jun 01, 2012 at 09:34:05AM -0700, Justin Pettit wrote:
>> 
>> My guess is that you're both using the upstreamed OVS kernel module,
>> 
>> which does not have the built-in support for tunneling.  You can use
>> 
>> Linux's native GRE tunnels and just attach them as you would other
>> 
>> interfaces to OVS.  You'll lose the ability to dynamically set the key
>> 
>> and create tunnels through the database, though.  If you need that
>> 
>> functionality, you'll need to use the kernel module that comes with
>> 
>> our distribution.
>> 
>> 
>> 
>> --Justin
>> 
>> 
>> 
>> 
>> 
>> On Jun 1, 2012, at 4:25 AM, Madko wrote:
>> 
>> 
>> 
>> I have exactly the same problem on Fedora 17 (kernel 3.3.7),
>> https://bugzilla.redhat.com/show_bug.cgi?id=821159
>> 
>> 
>> 
>> 
>> 
>> 2012/6/1 faicker mo <faicker.mo at gmail.com>
>> 
>> I create gre tunnel like this:
>> 
>> 
>> 
>> ovs-vsctl add-port br0 gre0 -- set interface gre0 type=gre
>> options:remote_ip=192.168.1.101
>> 
>> 
>> 
>> But I found:
>> 
>> 
>> 
>> ovs-vsctl show
>> 
>> 8a59928b-ebf3-44f9-85d4-80fdac32207f
>> 
>>   Bridge "br0"
>> 
>>       Port "br0"
>> 
>>           Interface "br0"
>> 
>>               type: internal
>> 
>>       Port "gre0"
>> 
>>           Interface "gre0"
>> 
>>               type: gre
>> 
>>               options: {remote_ip="192.168.1.101"}
>> 
>>       Port "vnet0"
>> 
>>           Interface "vnet0"
>> 
>> 
>> 
>> the /var/log/messages.log:
>> 
>> 
>> 
>> 7040 Jun  1 19:03:02 archlinux ovs-vswitchd: 00062|bridge|INFO|created port
>> gre0 on bridge br0
>> 
>> 
>> 7041 Jun  1 19:03:02 archlinux ovs-vswitchd: 00063|dpif|WARN|system at br0:
>> failed to add gre0 as port: Address family not supported by protocol
>> 
>> 
>> 7042 Jun  1 19:03:02 archlinux ovs-vswitchd: 00064|bridge|WARN|gre0 port has
>> no interfaces, dropping
>> 
>> 
>> 7043 Jun  1 19:03:02 archlinux ovs-vswitchd: 00065|bridge|INFO|destroyed
>> port gre0 on bridge br0
>> 
>> 
>> 7044 Jun  1 19:03:02 archlinux ovs-vswitchd: 00066|bridge|WARN|bridge br0:
>> using default bridge Ethernet address b3:8b:ef:f1:d6:41
>> 
>> 
>> 
>> -------
>> 
>> I searched, and I unloaded the gre,ip_gre module, but the problem is the
>> same.
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
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>> 
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>> 
>> 
>> 
>> 
>> 
>> --
>> 
>> Edouard Bourguignon
>> 
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