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10-01-2014 07:05 AM
10-01-2014 07:05 AM
Testing Issue with HP VAN SDN Controller 2.3.5
Hi,
I have an issue when I'm trying to deploy applications for test. I disabled verifying signed Jar files by doing the following 2 steps:
(1) Modifying the /opt/sdn/virgo/bin/dmk.sh script and adding "-Dsdn.signedJar=none" in "JMX_OPTS".
(2) Setting com.hp.sdn.adm.mgr.impl.AppManager.verifyZips to flase in HP SDN Controller Console.
and I was able to deploy the applications successfully but the issue is that when I try to run a mininet topology to test against, I receive the following message:
"Unable to contact the remote controller at <controller ip>:6633"
Even restarting the services "sdnc and sdna" doesn't solve it. I had to reinstall the controller again.
Any suggestions to solve this issue?
BR,
Ahmad
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10-09-2014 03:43 AM
10-09-2014 03:43 AM
Re: Testing Issue with HP VAN SDN Controller 2.3.5
Hello Ahmad,
Since the issue occurs when you try to run the mininet topology , so please share the command you are running for mininet.
Also you have re-installed the controller , are you still facing the same issue?
Before starting mininet, could you please try to ping the Controller IP and check whether it is working?
You can check if Controller is listening on port 6633 using below command
netstat -nl | grep 6633
Thanks,
HP SDN Team
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10-09-2014 05:23 AM
10-09-2014 05:23 AM
Re: Testing Issue with HP VAN SDN Controller 2.3.5
Hello,
Currently I'm not facing this issue but sometimes it appears wihtout changing anything. Sometimes restarting sdna and sdnc solves the problem and sometimes not. But now it's working fine.
The mininet command I'm using is:
sudo mn --mac --controller=remote,ip=192.168.186.128 --topo=tree,depth=2,fanout=2
Thanks,
Ahmad
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10-27-2014 10:51 PM
10-27-2014 10:51 PM
Re: Testing Issue with HP VAN SDN Controller 2.3.5
Hello Ahmad,
Doing a follow up to check if you need any further assistance with respect to the query posted.
Please do let us know if your problem is solved.
If you have more questions on the same topic please do reply on the same thread or open a new post if new topic.
Thanks,
HP SDN Team
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10-27-2014 11:12 PM
10-27-2014 11:12 PM
Re: Testing Issue with HP VAN SDN Controller 2.3.5
Hello,
Yes, the problem has been solved but subjected to occur again. If so, I will reply on the same thread. My appreciation for your help.
BR,
Ahmad Al Gohary
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04-25-2015 05:10 PM
04-25-2015 05:10 PM
Re: Testing Issue with HP VAN SDN Controller 2.3.5
Hi,
I have observed the same problem. Sometimes (for example after restarting server which runs controller) the mininet is unable to connect to controller. Multiple restart of sdnc/sdna solve it.
Krystof
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06-05-2016 06:00 PM
06-05-2016 06:00 PM
Re: Testing Issue with HP VAN SDN Controller 2.3.5
Hi, I am having the same issue. Some times I can not connecto to the controller. I am using mininet.
Please help.
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06-06-2016 07:46 AM
06-06-2016 07:46 AM
Re: Testing Issue with HP VAN SDN Controller 2.3.5
Can I ask that you please update your environments to the 2.7.10 release? We've made a lot of improvements to everything in the many releases sense 2.3.5 as well as delivering a VMware OVA installation package.
Please see this link for download options:
https://h10145.www1.hpe.com/Downloads/SoftwareReleases.aspx?ProductNumber=J9863AAE
Please report back if you're still having trouble with mininet after upgrade.
Cheers,
-Scott
HPE Aruba
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06-06-2016 08:25 AM - last edited on 06-18-2021 03:53 AM by Ramya_Heera
06-06-2016 08:25 AM - last edited on 06-18-2021 03:53 AM by Ramya_Heera
Re: Testing Issue with HP VAN SDN Controller 2.3.5
When using mininet and the VAN controller, always make sure that the mininet topology is not looped when the controller setting is hybrid.mode=true. This would occur even with the latest releases of VAN, but only in looped topologies (the 'tree' topology referenced above is not looped).
Detailed description follows ...
The hybrid.mode=true setting means that the VAN controller will delegate traditional forwarding decisions and topology calculations to the controlled switches, rather than doing specific path-paving itself. This is done to take advantage of the decades of forwarding logic built into switching ASICs. This means that VAN will rely upon spanning-tree or other data-plane protocols to resolve loops in the topology, so that VAN can focus on directing packets related to installed SDN applications (DNS, Lync, etc).
Since mininet does not resolve looped topologies on its own, this causes mininet to loop all packets when VAN is configured with hybrid.mode=true ... mininet assumes the controller will resolve the loop, and the VAN controller delegates that decision back to mininet.
Here's a technical paper which gives the conceptual motivations for hybrid.mode=true:
http://h20195.www2.hp.com/V2/GetDocument.aspx?docname=4AA5-6738ENW&cc=us&lc=en
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06-09-2016 02:19 PM
06-09-2016 02:19 PM
Re: Testing Issue with HP VAN SDN Controller 2.3.5
I was using HPE SDN VAN Controller 2.5.20 the controller is installed on a virtual machine. The problem is that when I run
netstat -nl | grep 6633. Sometimes it is listening and sometimes it does not. When it is listening mininet can connect to the controller easily.
I tried HPE SDN VAN Controller 2.7.10 and I have the same problem.