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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hi lasterjetyang:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">>There is one thing I am not quite sure, maybe you can coach me. by using OVS or OpenDayLight or floodlight, the east-west bound traffic will be defined as flow, and I personally don't understand how storm could happen
in OpenFlow. <br>
>PS I could be wrong on this.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks for your reply.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">As far as I know, to ARP or DHCP broadcast request packets , SDN controller can reponse packets directly by flowtable instead of broadcast.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">But BUM(broadcast, unknown unicast, or multicast) are not only these two type of packets, for example , many APPs use UDP broadcast.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Right now there are many types of packets that current sdncontroller could not deal with but only forward normally.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In addition, I think the traditional network(not support openflow or SDN) still exist for long time .
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So I think BUM will still exist, traffic storm will still occur.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks for your suggestions!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Zhou Yu<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> laserjetyang [mailto:laserjetyang@gmail.com]
<br>
<b>Sent:</b> Sunday, March 02, 2014 10:38 AM<br>
<b>To:</b> Yuzhou (C)<br>
<b>Subject:</b> Re: [openstack-dev] [neutron]the discussion about traffic storm protection in network virtualization environment<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">you might want to list how storm happened in either using OVS or Linux Bridge. This looks to me a QoS control.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US">Right now, Nuetron has more problem than traffic control. The L2 agent should be unified, the L3 agent should be unified.<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US">You might want to join the IRC chat and talk to Gary, Dan, locally you can approach Yong Sheng and the NEC guy to get a core sponsor.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">To go further, can you protect the network traffic in nova-network? It is really not necessary to get a blueprint to achieve your goal in nova-network setup. Neutron should be re-architectured.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">There is one thing I am not quite sure, maybe you can coach me. by using OVS or OpenDayLight or floodlight, the east-west bound traffic will be defined as flow, and I personally don't understand how storm could happen
in OpenFlow. <br>
PS I could be wrong on this.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">On Thu, Feb 27, 2014 at 8:40 PM, Yuzhou (C) <<a href="mailto:vitas.yuzhou@huawei.com" target="_blank">vitas.yuzhou@huawei.com</a>> wrote:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hi everyone:<br>
<br>
A traffic storm occurs when broadcast, unknown unicast, or multicast (BUM) packets flood the LAN, creating excessive traffic and degrading network performance.<br>
So physical switch or router offer traffic storm protection, these approaches:<br>
1.Storm suppression, which enables to limit the size of monitored traffic passing through an Ethernet interface by setting a traffic threshold.<br>
When the traffic threshold is exceeded, the interface discards all exceeding traffic.<br>
2.Storm control, which enables to shut down Ethernet interfaces or block traffic when monitored traffic exceeds the traffic threshold. It also enables an interface to send trap or log messages when monitored traffic reaches a certain traffic threshold,
depending on the configuration.<br>
I want to get traffic storm protection in network virtualization environment as same as in physical network. So I registered a BP: <a href="https://blueprints.launchpad.net/neutron/+spec/traffic-protection" target="_blank">https://blueprints.launchpad.net/neutron/+spec/traffic-protection</a>
and<br>
wrote a Wiki: <a href="https://wiki.openstack.org/wiki/Neutron/TrafficProtection" target="_blank">
https://wiki.openstack.org/wiki/Neutron/TrafficProtection</a><br>
<br>
I would like your opinions about this subject. Specifically, how to avoid traffic storm and protect traffic in network virtualization environment ? Is there other approaches?<br>
Welcome to share your experiences about it .<br>
<br>
Thanks,<br>
<br>
Zhou Yu<br>
<br>
<br>
<br>
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