Hello Gurucharan,

Thank you for your reply.

Yes without the controller, I'm able to ping both nodes on br0.

I'll create the virtual interface on br0. Currently I have set the private ip 
on br0  of the VLAN 1751 eth2.1751 interface. I'll move the private ip to the 
virtual interface and configure it as VLAN 1751 interface. I'll try this and 
update you.

Thank you,
Sripriya


From: Gurucharan Shetty [mailto:[email protected]]
Sent: Friday, October 18, 2013 11:40 AM
To: Seetharam, Sripriya (MU-Student)
Cc: [email protected]
Subject: Re: [ovs-discuss] Need help with OpenvSwitch setup on Physical Nodes



On Thu, Oct 17, 2013 at 4:24 PM, Seetharam, Sripriya (MU-Student) 
<[email protected]<mailto:[email protected]>> wrote:
Hello All,

I need help with the following use case of two bare metal nodes running 
OpenvSwitch on them and connected on a Layer 2 VLAN. I have OpenDaylight 
controller running on a remote VM. I'm attaching the topology below.
[Description: Description: cid:[email protected]]
As you can see in the picture, I have OvS running directly on the bare metal 
node and not on any virtual machine/hypervisor. Both nodes are geographically 
distributed and are connected by a point to point VLAN 1751 through the 
physical interface eth2.1751

My goal: I would like to control the flows coming out of both nodes based on 
packet type and direct to Layer2 or Layer 3 VLAN accordingly.

Current status:
Installed OvS and created a OvS bridge br0 on both nodes and attached eth2.1751 
physical port to the OvS bridge.
I set the private ip address of eth2.1751 to OvS bridge on both nodes and added 
a route entry for br0.
Set the ODL controller on the remote VM on both nodes and I can see that the 
controller detects both the OvS.

Problem: I cannot ping both nodes when the controller is set since it is unable 
to detect the input interface of the bare metal nodes to direct the 
OpenvSwitch.  Till now, OpenVswitch has been used most often in a virtual 
environment and can detect the virtual input ports and map it accordingly to 
the physical ports. But in my case, since I have OvS running on the physical 
host itself, I'm not sure how to handle this use case.
Without the controller, you can ping from "br0" of the 2 OVS's? If not, try and 
figure out whats going on there.
>From what you are saying it looks to me that the "controller" does not have a 
>configuration option to add flows for the packets coming in from interface 
>"br0". You can probably workaround the problem by adding another interface to 
>"br0" which mimics a vif interface of the VM but does not have any VM actually 
>connected to it. (ovs-vsctl add-port br0 p0 -- set interface p0 type=internal).


Eitherways, it is not a Open vSwitch limitation in any sense. You may ask the 
same question in the Open Daylight forum to see if the controller can do 
something like this.


Can you please suggest me if such a use case can be implemented using 
OpenvSwitch and OpenDaylight and provide some guidance.
Thank you very much for your help.

-Sripriya


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