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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">With “</span>ovs-ofctl -O OpenFlow13 dump-flows br-int” I don’t see ANY entries for packets to 48.0.0.0/8 or 16.0.0.0/8<o:p></o:p></p>
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<p class="MsoNormal">Only this one entry (which I think is a static route which I have in the router between the floating network and the private network).<o:p></o:p></p>
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<p class="MsoNormal">David<span style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Aswin Suryanarayanan [mailto:asuryana@redhat.com]
<br>
<b>Sent:</b> 20 July 2018 12:28<br>
<b>To:</b> Lake D Mr (PG/R - Elec Electronic Eng) <d.lake@surrey.ac.uk><br>
<b>Cc:</b> odl netvirt dev <netvirt-dev@lists.opendaylight.org>; openstack@lists.openstack.org; Ge C Dr (Elec Electronic Eng) <c.ge@surrey.ac.uk><br>
<b>Subject:</b> Re: [netvirt-dev] VM as a router with ODL/OpenStack<o:p></o:p></span></p>
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<p class="MsoNormal">On Fri, Jul 20, 2018 at 4:32 PM, <<a href="mailto:d.lake@surrey.ac.uk" target="_blank">d.lake@surrey.ac.uk</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi Aswin<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I’ve just noticed that I don’t think the packet is ever actually making it through to OVS.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">If I do a “ovs-dpctl dump-flows” then I see the immediate drop on ingress port 5.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">But if I extend that to “ovs-ofctl -O OpenFlow13 dump-flows br-int” the only entry I see is:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">cookie=0x8000003, duration=3823.308s, table=21, n_packets=0, n_bytes=0, priority=18,ip,metadata=0x30d40/0xfffffe,nw_dst=48.0.0.0/8 actions=group:150007<o:p></o:p></p>
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<p class="MsoNormal">Oh I think it is hard to understand the reason from this flow. Were you able to identify where the packet is dropped from “ovs-ofctl -O OpenFlow13 dump-flows br-int” ?
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a name="m_-8999864152201905370__MailEndCompose"></a> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I’ve just checked the port names and “Port 5” is:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">name : "br-prov2-patch"<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">ofport : 5<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">David<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Aswin Suryanarayanan [mailto:<a href="mailto:asuryana@redhat.com" target="_blank">asuryana@redhat.com</a>]
<br>
<b>Sent:</b> 20 July 2018 10:45<br>
<b>To:</b> Lake D Mr (PG/R - Elec Electronic Eng) <<a href="mailto:d.lake@surrey.ac.uk" target="_blank">d.lake@surrey.ac.uk</a>><br>
<b>Cc:</b> odl netvirt dev <<a href="mailto:netvirt-dev@lists.opendaylight.org" target="_blank">netvirt-dev@lists.opendaylight.org</a>>;
<a href="mailto:openstack@lists.openstack.org" target="_blank">openstack@lists.openstack.org</a>; Ge C Dr (Elec Electronic Eng) <<a href="mailto:c.ge@surrey.ac.uk" target="_blank">c.ge@surrey.ac.uk</a>><br>
<b>Subject:</b> Re: [netvirt-dev] VM as a router with ODL/OpenStack</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Fri, Jul 20, 2018 at 1:02 PM, <<a href="mailto:d.lake@surrey.ac.uk" target="_blank">d.lake@surrey.ac.uk</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hello<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I’m trying to use a VM as a router in an OpenStack + ODL installation.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I have the VM set up with two internal addresses - 10.10.5.21 and 10.10.6.21. They are allocated floating public addresses of 10.201.81.21 and 10.201.82.21 respectively.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I am using a TREx load generator which sources from
<a href="http://16.0.0.0/8" target="_blank">16.0.0.0/8</a> and sinks to <a href="http://48.0.0.0/8" target="_blank">
48.0.0.0/8</a>. <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I have added routes both ways on the routers between the floating and private addresses.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I have read that I need to disable “port security” on the VM ports to allow IP spoofing - does this also include the router ports?<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Router ports have port security disabled by default , no need to do that explicitly.
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Also, when I start a test session generating traffic from 16.0.0.0 -> 48.0.0.0. I see a flow in OVS which matches but has an action of “drop.”<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Which table exactly is the packet dropped?
<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">How do I overcome this?<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thanks in advance<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">David<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Sent from my iPhone<o:p></o:p></p>
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_______________________________________________<br>
netvirt-dev mailing list<br>
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<a href="https://lists.opendaylight.org/mailman/listinfo/netvirt-dev" target="_blank">https://lists.opendaylight.org/mailman/listinfo/netvirt-dev</a><o:p></o:p></p>
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