[ovs-discuss] newbie discovering ovs

[Xavier COUDIN]

Well, some half-good news.

It's almost working.
Did not recompile as kernel-module yet.

VirtualBox can create pseudo-ethernet interface , to put the VMs in 
local network (limited to the host).
The name of those interfaces are vboxnet0  (vboxnet1,.......).
If cleary appear in the ifconfig of the host.
But...Virtualbox REFUSES to create thos interface WITHOUT an ip-adress, 
so I kept the suggested address 192.168.57.1 for vboxnet1. Then I 
configurated the VM (win-2k virtual machine) to use this vboxnet1 as its 
ethernet interface. Actually, the VM does not receive the ip 
192.168.57.1, and is asking for an ip through dhcp.

Now in OVS, I created a bridge br0. I added 2 ports to the br0
- port eth0 of the host (without tag, so 802.1q)  connected to an 
external manageable switch
- vboxnet1 tag=6

....working
The WM can obtain an ip-adress from the dhcp, and can ping an address on 
the internet  (ex. www.google.com)

...but
When I try to access to the web with a web-browser, I can only receive a 
few frames and then it remains waiting, waiting, waiting........
When I disconnect the VM from the ovs bridge and tie it back to the 
(host) linux-bridge  (eth1), the web-browser is running fine.


So it is not fully workable for the moment. I will try to rebuild ovs 
with kernel-module option and see if I can get somothing better.

Also I will try the solution with building tap0 and tap1 
pseudo-ethernet-cards (I gess, using the kvm functionalities of Linux) 
to see if it can improve my problem.





Le 20/01/2011 09:43, Xavier COUDIN a écrit :
> Ben Pfaff a écrit :
>> On Wed, Jan 19, 2011 at 09:51:31AM +0100, Xavier COUDIN wrote:
>>> I installed ovs from sources. Compilation was OK, initialization was 
>>> OK.
>>> I chose to compile-install it without kernel module, so that means
>>> as userspace. Maybe in the future I will compile kernel modules, but
>>> I prefered to test in userpsace for the moment.
>>
>> We don't test the userspace version of OVS very much, so it could easily
>> have bugs that the kernel version doesn't, even bugs that keep it from
>> working at all.
>>
> Maybe, but I believe also that I have personnal difficulties to handle 
> it. Until now I was just using WmWare ESX and ESXi, wich is an 
> integrated solution (virtualization + virtualswitch). So of course in 
> that case, it is much easier to connect a vm to a vs.
>
> Anyway thanks to all of you for your support.
>
>> I hope that you read the instructions in INSTALL.userspace.
> I hope so. I printed the sheet and tried to follow every step that was 
> written.
>
>


-- 
Xavier COUDIN  -  coordinateur informatique
Lycée Pays-de-Retz, 44210 Pornic, tel 02 40 82 40 19  poste 167
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