<div dir="ltr">Youngho:<div><br></div><div><div class="gmail_extra"><div class="gmail_quote">On Mon, Sep 2, 2013 at 10:51 PM, yungho <span dir="ltr"><<a href="mailto:yungho5054@gmail.com" target="_blank">yungho5054@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><span lang="en"><span>Hello</span>,</span><div>
<span lang="en"><span>       I</span> <span>CentOs6.4</span> <span>environment</span> <span>to deploy</span> <span>OpenStack G</span> <span>version</span><span>, Controller Node, Network Node, Compute Node.</span> <span>Networks</span> <span>using</span> <span>Quantum,</span> <span>but</span> <span>is still</span> <span>on the</span> <span>Quantum</span> <span>network model</span> <span>do not know,</span> <span>and want to know</span> <span>under what circumstances the</span> <span>use of</span> <span>gre,</span> <span>under what circumstances</span> <span>the vlan</span> <span>mode.</span></span><br>

</div></div><div class="gmail_extra"><br></div></blockquote></div><div class="gmail_extra"><br></div><div>Do you have administrative privileges on the networking switch that connects your compute hosts together? If so, I would recommend using vlan mode. You will need to configure your switch appropriately.</div>
<div><br></div><div>If you aren't able to modify the settings on your switch, or if your nodes are not all connected to the same L2 network, then you will need to use GRE tunnels.</div><div><br></div><div>I believe that GRE will work for pretty much all scenarios (since it just requires IP connectivity), but I think it introduces some overhead. However, I have no first-hand experience with it.</div>
<div><br></div><div>Take care,</div><div><br></div><div>Lorin</div><div>-- <br></div><div dir="ltr">Lorin Hochstein<br><div>Lead Architect - Cloud Services</div><div>Nimbis Services, Inc.</div><div><a href="http://www.nimbisservices.com" target="_blank">www.nimbisservices.com</a></div>
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