Hi Ali, I have been trying to get to this and realized this is getting pushed back more and more on my plate. So short answers....
> What do you mean by checking the flow entries of the switches??? Use dpctl dump-flows to see what flows are in the switches. You can bring up the terminals for the switches using screen -r of<x>. > By switches > you mean Openflow switches and kindly explain what is the procedure to check > them??? Yes, I am referring to OpenFlow switches. Knowing the dpctl options can be useful for these debugging. Wireshark would help a lot too. I noticed that NS-3 has started to support OpenFlow. That might be a viable option for you too. Sorry, I really wanted to spend some time on this but just don't see when that would be at this moment. Regards KK 2011/4/17 Ali hussain <alihussain...@hotmail.com>: > > Hi > I havent been yet successful in re-establishing the wirefilter as yet > when you kill it.i iam using the same procedure as described in my previous > mail below.I noted something that when you create a double wirefilter in xml > i.e host 1 attached to both OF 1 and OF 2, by adding the code ,BELOWthe OF 1 > wirefilter code the hosts ping but as soon as you delete the wire filter > attached to OF 1, the pings stop although the host is still connected to OF > 2. But if u add this code above OF 1 than the ping continue after deleting > OF1 but ends when deleting OF2. I have also tried deleting both wirefilter > and then creating them but it attaches to the same OF switch that is above > the other in the code. > > So how do i create a new wirefilter after killing the old one. > > What do you mean by checking the flow entries of the switches???By switches > you mean Openflow switches and kindly explain what is the procedure to check > them??? > > > Regard Ali > >> From: yap...@stanford.edu >> Date: Sat, 26 Feb 2011 09:15:35 -0800 >> Subject: Re: [openflow-discuss] Simple Handover(Without using AP's) >> To: alihussain...@hotmail.com >> CC: openflow-discuss@lists.stanford.edu >> >> Hi Ali, >> >> I might sound repetitive here. But check the flow entries on the >> switches and see if the re-route was done successfully! >> >> One thing that is hard to do is to detect the handover in the control >> plane. What OpenRoads/OpenFlow Wireless does is to use WiFi >> association to do that. Can't do this in the virtual environment >> though. >> >> Regards >> KK >> >> 2011/2/26 Ali hussain <alihussain...@hotmail.com>: >> > >> > Hi KK, >> > Thanks for your reply.Well after killing the wirefilter and >> > than >> > creating a new o ne with the other openflow switch the arp packet of >> > ping >> > dont reach the controller .Is there a problem in the creation procedure >> > of >> > the wirefilter?Im using nox-zaku (0.9). >> > >> >> From: yap...@stanford.edu >> >> Date: Fri, 25 Feb 2011 13:41:14 -0800 >> >> Subject: Re: [openflow-discuss] Simple Handover(Without using AP's) >> >> To: alihussain...@hotmail.com >> >> CC: openflow-discuss@lists.stanford.edu >> >> >> >> Hi Ali, >> >> >> >> I suggest re-routing the flow since your host has "handed over" from >> >> one switch to another. Check the flow entries on the switches and see >> >> if the re-route was done successfully. Which controller are you using >> >> here? >> >> >> >> Regards >> >> KK >> >> >> >> 2011/2/25 Ali hussain <alihussain...@hotmail.com >: >> >> > He llo KK >> >> > Thanks for you reply.At first i was having some >> >> > trouble >> >> > running the code but they all have been sorted out as the 2 hosts are >> >> > pinging . >> >> > >> >> > When i type the command ps ax | grep wire i can see the wire filter >> >> > and >> >> > can >> >> > kill it using the command sudo kill -9 XXXX (the id of the wire >> >> > filter).After killing it the pinging stop.After that i use the >> >> > following >> >> > command to establish a new wire filter command between host 1 and >> >> > open >> >> > flow >> >> > switch 2: >> >> > >> >> > dpipe vde_plug $PWD/vde/ctlhost1of2 = wirefilter --mgmt >> >> > $PWD/vde/wiremgmthost1of2of2host1 --mgmtmode 700 = vde_plug >> >> > $PWD/vde/ctlof2host1 & >> >> > >> >> > >> >> > It say: wirefilter: bidirectional filter starting... >> >> > >> >> > But the host d ont ping each other anymore.If i use the previous >> >> > command >> >> > again: >> >> > >> >> > root@XXX:/home/ali/Desktop/openflowvms# dpipe vde_plug >> >> > $PWD/vde/ctlhost1of1 >> >> > = wirefilter --mgmt $PWD/vde/wiremgmthost1of 1of1host1 --mgmtmode >> >> > 700 = >> >> > vde_plug $PWD/vde/ctlof1host1 & >> >> > >> >> > the host start to ping again.I dont understand that why not a >> >> > connection is >> >> > being established between the later switch (OF2) and the host. >> >> > >> >> > >> >> > I also tried to change the topology in XLM by creating a dual wir e >> >> > of >> >> > Host1 >> >> > connected to both OF1 and OF2. But if ,in XML, Host 1 is attached to >> >> > OF >> >> > 1 >> >> > first than OF 2 than deleting the wire filter between host 1 and OF 1 >> >> > kills >> >> > the ping although it is already attached to OF2 via a wire filter. >> >> > >> >> > >> >> > Thank You, >> >> > Hussain >> >> > >> >> > >> >> > ; >> >> > >> >> > _______________________________________________ >> >> > openflow-discuss mailing list >> >> > openflow-discuss@lists.stanford.edu >> >> > https://mailman.stanford.edu/mailman/listinfo/openflow-discuss >> >> > >> >> > >> > >> > _______________________________________________ >> > openflow-discuss mailing list >> > openflow-discuss@lists.stanford.edu >> > https://mailman.stanford.edu/mailman/listinfo/openflow-discuss >> > >> > > _______________________________________________ openflow-discuss mailing list openflow-discuss@lists.stanford.edu https://mailman.stanford.edu/mailman/listinfo/openflow-discuss
