[nox-dev] Congestion
Is there any way I can simulate congestion on a OpenFlow Network? Regards -- Rohit Manohar Graduate Student North Carolina State University Raleigh, US. ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
[nox-dev] Ip Address
I am trying to change the IP source for a flow. For that I am doing the following: src_ip = '10.0.0.4' actions = [[openflow.OFPAT_OUTPUT, [0, prt[0]]],[openflow.OFPAT_SET_NW_SRC,src_ip]] When I run the code, I get the following error. Any idea what might be causing it? 00035|pyrt|ERR:unable to invoke a Python event handler: Traceback (most recent call last): File ./nox/lib/util.py, line 116, in f event.total_len, buffer_id, packet) File ./nox/coreapps/examples/pyproject.py, line 166, in packet_in_callback forward_l2_packet(dpid, inport, packet, packet.arr, bufid) File ./nox/coreapps/examples/pyproject.py, line 107, in forward_l2_packet inport, buf) File ./nox/lib/core.py, line 378, in install_datapath_flow (idle_timeout, actions, buffer_id), hard_timeout) File ./nox/lib/core.py, line 257, in send_flow_command oactions = self.make_action_array(actions) File ./nox/lib/core.py, line 168, in make_action_array a = struct.pack(HHI, htons(action[0]), htons(8), iaddr.addr) AttributeError: 'int' object has no attribute 'addr' Regards, -- Rohit Manohar Graduate Student North Carolina State University Raleigh, US. ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
[nox-dev] Iperf
I want to use iperf on openflow. Is there any documentation regarding how to use iperf with various options on mininet? e.g If i want iperf to run for a specified period of time OR using specific bandwidth OR generate traffic on specific ports like 8080 or between specific hosts, what options are available. Regards -- Rohit Manohar Graduate Student North Carolina State University Raleigh, US. ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
[nox-dev] Checksum
I want to change the IP address of a flow. For this I am using actions = [[openflow_SET_NW_SRC, ip]]. I want to know what happens to the checksum? If is recalculated automatically or I have to call a function to do it? Regards, -- Rohit Manohar Graduate Student North Carolina State University Raleigh, US. ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
[nox-dev] Adding Flows
I want to add a flow. Where should I do it? I open a xterm for an openflow switch and run sechhan to connect it to a Nox-controller. If i want to run dpctl, I need to first stop seechan and hence I lose the connection with the nox-controller. Regards, -- Rohit Manohar Graduate Student North Carolina State University Raleigh, US. ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
[nox-dev] Devices
How do I identify which port is connected to which switch? I add devices as './dpctl addif nl:0 eth0' specifying the port being used for connection, but I am not able to figure out which device is at the other of the link. -- Rohit Manohar Graduate Student North Carolina State University Raleigh, US. ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
[nox-dev] Cycles
I am trying to build the following topology in Nox: Openflow2 -- - End1 -- Openflow1 Openflow4 End2 -- - - Openflow3 When I register Openflow4 with NOX, some sort of traffic loop is getting created. NOX is continuously registering packet-in events even when I haven't set up any flows. Are cycles not supported by NOX? If yes, do I need to indicate it in the .conf file? Regards, -- Rohit Manohar Graduate Student North Carolina State University Raleigh, US. ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
[nox-dev] Different Controllers for Different Switches
I am simulating Load Distribution for Servers. I need to run the distribution component only on the switch that is connected to the servers. All other switches need to perform normal routing. Can I use different controllers for different switches on the same network(by using a different port number)? Regards, -- Rohit Manohar Graduate Student North Carolina State University Raleigh, US. ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
[nox-dev] Version Problem
I have installed nox and want to use a virtual testing environment using qemu. I have used Openflow1.0 to make the nox controller. When I try ./secchan nl:0 tcp:10.0.2.2:2525 I get an error 'Version Negotiation failed. We support version 0x97 to 0x97 inclusive but peer supports no later than version 0x01. Which version on openflow should I use to make the nox-contorller? -- Rohit Manohar Graduate Student North Carolina State University Raleigh, US. ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
[nox-dev] Functionality in a Switch
I am working on a project to implement load distribution based on link
utilization. The basic idea is to distribute the load over output ports that
will take the flow to its destination. Consider a flow to a destination that
is reachable from a switch via 3 output ports {P1, P2, P3}. I want to
distribute the flow over them in round-robin fashion. For this, I plan to
use the counters maintained by Openflow switch for that flow. Right now, I
have built a nox-controller that is able to detect flows and after that push
the flow on to the switch. I wanted to know how can I configure multiple
switches to do round-robin from my Nox-controller.
Regards,
--
Rohit Manohar
Graduate Student
North Carolina State University
Raleigh, US.
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[nox-dev] Actions Based on Counters
Is is possible to define multiple actions for a single flow based on counters for that flow. The idea is to choose different output ports based on number of packets encountered in that flow. Regards, -- Rohit Manohar Graduate Student North Carolina State University Raleigh, US. ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
[nox-dev] Problem in Download
Hey I am trying to download NOXCore using: git clone git://noxrepo.org/noxcore but I am getting an error: 'fatal: The remote end hung up unexpectedly' Can you please suggest solution? Regards, -- Rohit Manohar Graduate Student North Carolina State University Raleigh, US. ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
