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<p class="MsoNormal"><img width="521" height="424" id="Picture_x0020_1" src="cid:image003.png@01D0145E.75813DF0"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have some of the basic question w.r.t Service-VM running the NFV. (These Service-VMs can be vNAT, vFW, vDPI, vRouting , vCPE etc ),
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>When these service-VM runs over the cloud (over OpenStack CN) each will be treated as Routable entity in the network ?<o:p></o:p></p>
<p class="MsoListParagraph">i.e, Each Service-VM will run its own routing protocol so that it is a reachable entity in the network ?<o:p></o:p></p>
<p class="MsoListParagraph"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Will there be any basic framework / basic elements that needs to run in these VM ?
<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">a.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Each Service-VM should also its routing instance + L3 Forwarding ..<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in">If so are they optional or mandatory
<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>When these Service-VM runs (which may be part vCPE) then each service packet will be carried till Service-VM or it will be handled in the OVS of the compute node it self ?<o:p></o:p></p>
<p class="MsoListParagraph">Then how this will be handled for routing packet ?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>If there are multiple ‘features running with in a Service-VM’ (example NAT,FW,IPSEC),
<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">a.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Then depending on the prefix(tenant/user traffic) may need to chain them differently .<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.5in;text-indent:-1.5in;mso-text-indent-alt:-9.0pt;mso-list:l0 level3 lfo2">
<![if !supportLists]><span style="mso-list:Ignore"><span style="font:7.0pt "Times New Roman"">
</span>i.<span style="font:7.0pt "Times New Roman""> </span></span><![endif]>Example for tenant-1 packet prefix P1: Service execution may be NAT
<span style="font-family:Wingdings">à</span> FW <span style="font-family:Wingdings">
à</span> IPSEC <o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.5in;text-indent:-1.5in;mso-text-indent-alt:-9.0pt;mso-list:l0 level3 lfo2">
<![if !supportLists]><span style="mso-list:Ignore"><span style="font:7.0pt "Times New Roman"">
</span>ii.<span style="font:7.0pt "Times New Roman""> </span></span><![endif]>Tennant-2 p2 : it may NAT->IPSEC->AAA<o:p></o:p></p>
<p class="MsoListParagraph"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">5.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>How the Service chain Execution, which may be running across multiple Service-VM is controlled.<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">a.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Is it controlled by configuring the OVS (Open V Switch ) running in the compute node ?<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">b.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>When the Service-VMs are running across different Compute nodes they need to be chained across OVS .
<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in">This needs to controlled by NFV Service Layer + OpenStack Controller ?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In my opinion there should be a some basic discussion on how these Service-VM’s framework and how they needs to be chained ,which entity are mandatory in such service to run over the cloud.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Please let me know if such discussion already happened ? Let me know others opinion for the same.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks & regards,<o:p></o:p></p>
<p class="MsoNormal">keshava<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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