<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>On May 2, 2013, at 3:52 PM, Sayed Qaiser Ali Shah Shah wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Thanks for your reply.<br><br>So, is it possible to delete flow entries from OVS flow table when it reached some limit by sending some sort of command from POX controller?<br></blockquote><div><br></div><div>When what reaches a limit? The flow table size? Or are you still talking about queues? If you mean queues, the answer is no. OVS and OpenFlow are not meant for queue manipulation.</div><div><br></div><div>-- Murphy</div><div><br></div><br><blockquote type="cite"><div class="gmail_quote">On Fri, May 3, 2013 at 3:32 AM, Murphy McCauley <span dir="ltr"><<a href="mailto:murphy.mccauley@gmail.com" target="_blank">murphy.mccauley@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><div>It sounds like you're talking about monitoring and manipulating the contents of queues, which is a very fine-grained operation that must operate at very small timescales. This isn't addressed by OpenFlow and probably isn't suitable for a remote controller. OpenFlow allows for assigning packets from a flow to a specific queue -- once they're past that point, they're out of OpenFlow's hands. I don't think OVS provides anything beyond that.</div>
<div><br></div><div>You may be able to achieve what you want by assigning flows to queues intelligently (e.g., put the things you may want to drop into a lower priority queue). If not, what you want to do is modify the queuing code (e.g., either in the Linux kernel or by using something like Click).</div>
<span class="HOEnZb"><font color="#888888"><div><br></div><div>-- Murphy</div></font></span><div><div class="h5"><br><div><div>On May 2, 2013, at 11:12 AM, Sayed Qaiser Ali Shah Shah wrote:</div><br><blockquote type="cite">
Hello Everybody,<br><br>I am working on queues in OVS and using POX controller. I have created queues in OVS and am assigning flows to Queues via POX controller. I can delete flows from OVS manually but I want to do is dynamically delete flows from queue, so that controller tells OVS to delete specific flow from queue when its full and how can we check that whether queue is full or not? Is there any technique to do this? As far as I searched, I didn't find any such thing on Internet.<br clear="all">
<br>-- <br><b style="color:rgb(51,51,153)"><span style="">Regards</span><br style=""><br style=""><span style="">Sayed Qaiser Ali Shah</span><br style="">
<span style="">MSIT-12</span><br style=""><span style="">NUST (SEECS)</span></b><br>
</blockquote></div><br></div></div></div></blockquote></div><br><br clear="all"><br>-- <br><b style="color:rgb(51,51,153)"><span style="background-color:rgb(255,255,255)">Regards</span><br style="background-color:rgb(255,255,255)">
<br style="background-color:rgb(255,255,255)"><span style="background-color:rgb(255,255,255)">Sayed Qaiser Ali Shah</span><br style="background-color:rgb(255,255,255)"><span style="background-color:rgb(255,255,255)">MSIT-12</span><br style="background-color:rgb(255,255,255)">
<span style="background-color:rgb(255,255,255)">NUST (SEECS)</span></b><br>
</blockquote></div><br></body></html>