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    <div class="moz-cite-prefix">On 12/17/13, 6:36 AM, Erik Moe wrote:<br>
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cite="mid:CAEdm+oT-t065=VG_2tN+qUm0Mf5Nr8O8xYztf-kN8Y6kZJVCvw@mail.gmail.com"
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        <div class="gmail_extra">Hi,</div>
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        <div class="gmail_extra">thanks for your comments.</div>
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        <div class="gmail_extra">see answers below.</div>
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        <div class="gmail_extra">Thanks,</div>
        <div class="gmail_extra">Erik</div>
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          <div class="gmail_quote">On Tue, Dec 17, 2013 at 6:17 AM,
            Isaku Yamahata <span dir="ltr"><<a
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                href="mailto:isaku.yamahata@gmail.com" target="_blank">isaku.yamahata@gmail.com</a>></span>
            wrote:<br>
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              .8ex;border-left:1px #ccc solid;padding-left:1ex">Added
              openstack-dev<br>
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                  <span style="color:rgb(34,34,34)">The document is
                    view-only. So I commented below.</span><br>
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              - 2 Modeling proposal<br>
                What's the purpose of trunk network?<br>
                Can you please add a use case that trunk network can't
              be optimized away?<br>
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            <div>In some use cases the trunk network will trunk all
              VLANS from a VM, so they can for example be 'tunneled' to
              another VM or externally. In the use case where a VM wants
              to connect to multiple Neutron networks, the trunk network
              is a logical connection between the VM trunk port and the
              L2-gateways. From my point of view it looks a little
              strange for this use case, but I think this is what we
              said during our meeting in Hong Kong (Unless I
              misunderstood something...). </div>
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            <div>I added use case where two VMs are connected through a
              trunk network. This can not be optimized away. The network
              would have to be able to trunk all VLANs between the VMs.</div>
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    I see the case where admin user wants to have more than one L2
    gateways to talk to the same VM trunk port. Also, these L2 gateways
    may connected to the untagged networks that belongs different
    tenants. The trunk network should belong to a single tenant though.<br>
    Yi<br>
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