topic Re: OpenFlow 1.3 running on Simware7 in Software Defined Networking

OpenFlow 1.3 running on Simware7

YohanGunasekara — Fri, 06 Feb 2015 08:38:51 GMT

Dear Experts,

I am trying to putup a SDN network with Simware 7. OpenFlow can be configured without any issue. Controller can see the switches, OF instances. But links in between the swicthes or the nodes are not getting updated.

Has anyone done this kind of demo before?

If yes, please share your experiences.

Thanks.

Yohan

Re: OpenFlow 1.3 running on Simware7

piricchio72 — Fri, 06 Feb 2015 08:53:30 GMT

Hi Yohan,

I did not try to use Simware but I would suggest you to disable Hybrid mode form the Controller Manager configuration.

default value is true, I would modify it to flase and reboot the controller service.

Keep in mind that HP Network Simulator cannot simulate hardware-based Comware features and that switching features based on ASICs cannot be tested using this tool, this might not prevent the controller to draw the topology but will impact your testing.

Regards,

Antoino

SDN CoE Team

Re: OpenFlow 1.3 running on Simware7

YohanGunasekara — Mon, 09 Feb 2015 08:57:42 GMT

Hi,

My controller is running on Hybrid Mode == False.

I am aware that the HW Base ASIC features may not run. I need to have a 4 OF nodes running in a ring and manipulate the traffic path. But the links and nodes are not being discovered.

Thanks.

Yohan

Re: OpenFlow 1.3 running on Simware7

Gerhard P — Wed, 13 Jul 2016 14:33:30 GMT

Hi!

I just found this post as I had the same problem when trying managing a virtual switch running in in the HP Comware Simulator (HCL Cloud Lab). I am running Version 7.1.59 of the Comware Simulator and Version 2.7.10 of the HPE VAN SDN Controller. Without setting the hybrid mode to false there are errors with the automatically added flows and the simulated switch will not added successfully. There are errors generated by the flows that are required for hybrid mode. I assume this is caused by the absence of real physical ports and some required reserved port types.

Withoud hybrid mode, the switch is detected and you can add flows to the table (1 table is supported with the number 0). The active logical and reserved ports appear in the OpenFlow Monitor view of the switches.

Re: OpenFlow 1.3 running on Simware7

ShaunWackerly — Fri, 15 Jul 2016 19:58:50 GMT

Hi Yohan and Gerhard,

The difference between hybrid.mode=true and hybrid.mode=false in this respect is that when hybrid.mode=true the default behavior becomes output=NORMAL, so the VAN SDN controller needs to push specific flows which will copy ARP/DHCP (host discovery) and BDDP (link discovery). When hybrid.mode=false, the default behavior is output=CONTROLLER so there is no need to these flows to get packets to the controller.

If you aren't seeing the forwarding behavior you expect, could you please attach the following on this thread?

The flows which currently exist on the device (OpenFlow Monitor->Flows)
The ports being reported by the device (OpenFlow Monitor->Ports)

If you could attach a small packet capture (OpenFlow Trace) then that would also be helpful, but it isn't strictly necessary.