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<p class="MsoNormal">Hi, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have been trying to enable the networking SFC mechanism in OpenStack. I have successfully created port pairs, port pair groups, port chain and a flow classifier. However, I am unable to get the service chain working. The architecture
of the set up I have deployed is attached. I have used the queens version of OpenStack.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The steps that I followed are as below.<o:p></o:p></p>
<p class="MsoNormal">• Create port<o:p></o:p></p>
<p class="MsoNormal"> neutron port-create --name <p1-p6> sfc-Network<o:p></o:p></p>
<p class="MsoNormal">• Create VMs and attach the interfaces with them accordingly<o:p></o:p></p>
<p class="MsoNormal"> VM1 – P1 & P2; VM2 – P3 & P4; VM3 – P5 & P6 <o:p></o:p></p>
<p class="MsoNormal">• Create port pairs<o:p></o:p></p>
<p class="MsoNormal"> neutron port-pair-create pp1 -- ingress p1 -- egress p2<o:p></o:p></p>
<p class="MsoNormal"> neutron port-pair-create pp2 -- ingress p3 -- egress p4<o:p></o:p></p>
<p class="MsoNormal"> neutron port-pair-create pp3 -- ingress p5 -- egress p6<o:p></o:p></p>
<p class="MsoNormal">• Create port pair groups <o:p></o:p></p>
<p class="MsoNormal"> neutron port-pair-group-create -- port-pair pp1 ppg1<o:p></o:p></p>
<p class="MsoNormal"> neutron port-pair-group-create -- port-pair pp2 ppg2<o:p></o:p></p>
<p class="MsoNormal"> neutron port-pair-group-create -- port-pair pp3 ppg3<o:p></o:p></p>
<p class="MsoNormal">• Create flow classifier<o:p></o:p></p>
<p class="MsoNormal"> neutron flow-classifier-create --source-ip-prefix <ip of p1> --destination-ip-prefix <ip of p6> --logical-source-port p1 fc1<o:p></o:p></p>
<p class="MsoNormal">• Create port chain <o:p></o:p></p>
<p class="MsoNormal"> neutron port-chain-create --port-pair-group ppg1 --port-pair-group ppg2 --port-pair-group ppg3 --flow-classifier fc1 pc1<o:p></o:p></p>
<p class="MsoNormal">I am testing this architecture by sending a ping request from VM1 to VM3. Therefore, the destination port is P6. If SFC is working correctly, I should be able to see the packets go through the VM2 to VM3 when I do a tcpdump in VM2. As I
am new to OpenStack and SFC, I am not certain if this is logically correct. <o:p>
</o:p></p>
<p class="MsoNormal">I would like to pose two questions. <o:p></o:p></p>
<p class="MsoNormal">1) All the VMs are on the same network, is it logically correct to expect the ping packets to be routed from VM1 > VM2 > VM3 in the SFC scenario? Because all the ports are on the same network, I get a ping response but it is
not via VM2 even though the port chain is created through VM2. <o:p></o:p></p>
<p class="MsoNormal">2) If not, how do I make sure that the packets are routed through VM2 which is the second port pair in the port pair chain. Could it be something to do with the OpenVSwitch configuration?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any help would be highly appreciated. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Kalyani Rajkumar<o:p></o:p></p>
<p class="MsoNormal">High Performance Networks Group, University of Bristol<o:p></o:p></p>
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