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List:       openvswitch-discuss
Subject:    [ovs-discuss] Connect OVS to a VM
From:       fichera.sil () gmail ! com (Silvia Fichera)
Date:       2015-05-29 11:14:10
Message-ID: CAEFdjR1gApw9cmF5dW0=f2Wx9DGSJ7zBQzAx+owxTfsY8PUy_Q () mail ! gmail ! com
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Hi Justin,
unfortunately I can't install the switch in the hypervisor, I can just use
the VMs.

I'm starting from scratch before the installation of Openstack. First of
all I want to setup the SDN network.
The connection between the switch and the ODL Controller works, I can see
OF packeIn and packetOut with tcpdump on the controller interface.
Now the problem is to connect the OVS inside vm5 to the other VMs.

In vm3 and vm4 I have assigned an IP address to the interface eth1.
(respectively 10.0.0.3 and 10.0.0.4)
Than I have done:
ovs-vsctl add-br br-eth1
ovs-vsctl add-port br-eth1 eth1

In vm5 , so where I've installed OVS, I've done:
ovs-vsctl add-br br
ovs-vsctl add-port br eth1 -- set interface eth1 type=gre
options:remote_ip=10.0.0.3
ovs-vsctl add-port br eth2 -- set interface eth2 type=gre
options:remote_ip=10.0.0.4

But I think I still missing something because the traffic does not go
through the switch.
Any suggestion to go forward? Ho to create the "physical" link?

Thanks.

Silvia

P.S.
If could be usefull:
I'm considering eth0 as management network.
In vm3 and vm4 there are also eth1 and eth2 for both VMs.
In vm5 there are also eth1 eth2 eth3 and the openflow bridge/interface that
I've created to set the Controller.




2015-05-26 22:17 GMT+02:00 Justin Pettit <jpettit at nicira.com>:

>
> > On May 26, 2015, at 3:11 AM, Silvia Fichera <fichera.sil at gmail.com>
> wrote:
> >
> > Hi all,
> > maybe mine is a silly question but it's getting me crazy!
> > My university gave me five VMs in a server to make some experiments with
> OpenStack+OpendayLight.
> > So I have:
> > vm1 -> ODL Controller
> > vm2 -> OpenStack Controller
> > vm3 / vm4 -> Compute nodes
> > vm5 -> OVS
> >
> > TO configure my environment I've followed the ODL's wiki about VTN, but
> I still do not understand how to attach the VMs that represent the compute
> nodes  to the switch.
> >  I have already set the Controller ODL (in fact with 'sudo ovs-vsctl
> get-controller bridge' I can see the IP address and the port of my
> controller). My problem remains how to connect my hosts  that are VM to the
> OVS.
> >
> > If you need more clarification about the environment, please ask.
>
> You'll need to get interfaces from v3 and v4 into vm5.  Once you have
> that, you just need to use "ovs-vsctl add-port" to make them work with
> OVS.  I don't know enough about your environment to know how you'll plumb
> those compute nodes' interfaces into the VM, since it is going to be
> platform-dependent.  Normally, the OVS would be running in the hypervisor,
> which would then have access to the VMs' VIFs directly.
>
> --Justin
>
>
>


-- 
Silvia Fichera
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