[ovs-discuss] A Problem with Openvswitch to Create and Test VLAN Function. I Need help!

Wed Jun 20 12:11:41 UTC 2012

Hi,

If it can help, I wrote a documentation about Openstack Essex + Quantum +
OVS in multi node architecture.

Maybe you will find an answer :

https://github.com/EmilienM/doc-openstack

Regards

On Wed, Jun 20, 2012 at 2:11 PM, Emilien Macchi <emilien.macchi at gmail.com>wrote:

> Hi,
>
>
> If it can help, I wrote a documentation about Openstack Essex + Quantum +
> OVS in multi node architecture.
>
> Maybe you will find an answer :
>
> https://github.com/EmilienM/doc-openstack
>
>
>
> Regards
>
>
> On Wed, Jun 20, 2012 at 8:03 AM, Gang Bao <baogang2004 at gmail.com> wrote:
>
>> Description of my problem has been posted on
>> https://answers.launchpad.net/quantum, but I have never received any
>> idea from it :-(
>>
>> My environment includes two physical hosts.
>> One of them (domain name cc201) installed all of nova components and
>> Glance, Quantum, Keystone, Horizon, Open-vSwitch as controller and network
>> node; the other installed only nova-compute, Quantum, Open-vSwitch as
>> compute node.
>>
>> also I run quantum-agent, load 8021q module.etc
>> Everything seems runs well.
>> But I found a curious problem!
>>
>> On cc201, I create networks 192.168.153.0/24(network3<http://192.168.153.0/24%28network3>,
>> its vlan ID is 6)、192.168.155.0/24(network5<http://192.168.155.0/24%28network5>,
>> its vlan ID is 8)
>> I run nova-manage on host cc201 to create VMs.
>> the VMs are:
>> 192.168.153.2 (on host cc201)
>> 192.168.153.4 (on host cc202)
>> 192.168.153.5 (on host cc202)
>> 192.168.153.6 (on host cc202)
>> 192.168.155.2 (on host cc201)
>> 192.168.155.3 (on host cc201)
>> 192.168.155.4 (on host cc202)
>>
>> I log on one of them to ping another of them and capture packets through
>> eth1(eth1 interface the openvswitch port on both of my hosts cc201 and
>> cc202, by using command ovs-vsctl add-port eth1 br-int), results are as
>> below:
>>
>> I run tcpdump -i eth1 -v -w to capture and save packets
>> when I log on 192.168.153.2 (on cc201, in vlan6):
>> ping 192.168.153.4 (on cc202, in vlan6): (result is they connected)
>> on eth1 of cc201:I can see vlan 6 tag in ICMP request and reply, it is
>> what I expected
>> on eth1 of cc202:I can see vlan 6 tag in ICMP request and reply, it is
>> what I expected
>>
>> when I log on 192.168.153.2 (on cc201, in vlan 6):
>> ping 192.168.155.2 (on cc201, in vlan8): (result is they are not
>> connected)
>> this result is also what I expect
>>
>> But when I log on 192.168.153.2 (on cc201, in vlan 6)
>> ping 192.168.155.4 (on cc202, in vlan 8): (result is they connected!!!)
>> on eth1 of cc201: I cannot see vlan 6 tag in ICMP, instead, I can see
>> vlan 8 tag in ICMP request and reply!!!
>> on eth1 of cc202: I cannot see vlan 6 tag in ICMP, instead, I can see
>> vlan 8 tag in ICMP request and reply!!!
>> another words, it has the wrong vlan tag! (expect 6 but actually 8!)
>>
>> so what happened ? Is this a known bug of quantum or openvswitch?
>>
>> more details is as below:
>> 1)nova config on cc201: nova.conf--http://paste.openstack.org/show/18588/
>> nova-compute.conf--http://paste.openstack.org/show/18589/
>> 2)nova config on cc202: nova.conf--http://paste.openstack.org/show/18590/
>> nova-compute.conf--http://paste.openstack.org/show/18591/
>> 3)other command results on cc201--http://paste.openstack.org/show/18592/
>> 4)other command results on cc202--http://paste.openstack.org/show/18593/
>>
>> when I ping from 192.168.153.2 to 192.168.155.2(result is not connected):
>> on cc201, the execution result of command "ovs-dpctl dump-flows br-int"
>> is as below:
>> http://paste.openstack.org/show/18625/
>> and on cc201, the execution result of command "ovs-dpctl show":
>> http://paste.openstack.org/show/18626/
>>
>>
>> when I ping from 192.168.153.2(on cc201) to 192.168.155.4(on
>> cc202)(result if connected!!??)
>> on cc201, the execution result of command "ovs-dpctl dump-flows br-int"
>> is as below:
>> http://paste.openstack.org/show/18627/
>> and on cc202, the execution result of command "ovs-dpctl show":
>> http://paste.openstack.org/show/18628/
>> and on cc202, the execution result of command "ovs-dpctl dump-flows
>> br-int" is as below:
>> http://paste.openstack.org/show/18629/
>>
>>
>>
>>
>> _______________________________________________
>> discuss mailing list
>> discuss at openvswitch.org
>> http://openvswitch.org/mailman/listinfo/discuss
>>
>>
>
>
> --
> *Emilien Macchi*
> Phone : +33 685 117 748
> Twitter : EmilienMacchi <https://twitter.com/#/EmilienMacchi>
> Website : http://my1.fr
>
>

-- 
Emilien Macchi
*SysAdmin (Intern)*
*www.stackops.com* | emilien.macchi at stackops.com**
*

*

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