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[Aru s <arumon82@xxxxxxxxx>]

Hi  Logan,

Thanks for the reply. I have one more question.
How we will check whether the tunneling is established or not?
I have gone through lot of documents of gre setup and all are says that the
"ovs-vsctl show" command will show the tunnel info.
Also is there a doc to understand how the magic happens for tunneling.

Regards,
Arumon


On Tue, Mar 12, 2013 at 6:23 PM, Logan McNaughton <logan@xxxxxxxxxxxx>wrote:

> For Quantum GRE tunneling, the network node and compute nodes need a NIC
> on your data network. You assign each of those NIC's an IP (for instance,
> 192.168.1.1-3). Then (assuming you are using openvswitch with GRE
> tunneling) you set up your quantum configs. Look at the Quantum
> administration guide for an example of GRE tunneling with openvswitch.
>
> After that you just let it work its magic. All VM traffic is encapsulated
> inside GRE packets traveling between the nodes, it'll all look like packets
> in that 192.168.1-3 network.
>
> Once the packet reaches its destination node, the GRE encapsulation is
> removed and the VM packet is read.
> On Mar 12, 2013 6:36 AM, "Aru s" <arumon82@xxxxxxxxx> wrote:
>
>>  Hi,
>>
>> I am trying to configuring openstack with one controller and one network
>> and two compute nodes.
>> I am not able to understand how the communication of the VM's happens
>> which are for the same tenant with same ip range but on the different
>> compute hosts.
>> Please help me to understand how GRE communication happens.
>>
>> Regards,
>> Arumon
>>
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