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From "Imran Ahmed" <>
Subject RE: OVS Plugin
Date Fri, 14 Apr 2017 17:49:37 GMT
Hi Dag,

Thank you for your response. I was consulting that documentation link as well. As the documentation
says, after selecting the GRE isolation type for guest network, we have to enable the OVS
plugin under the service providers list inside cloudstack UI.  I could not somehow find OVS
in that list. 

But anyway we have switched to VLAN isolation mode and using default Linux bridging as they
underlying networking provider now. I personally liked to go for VXLAN but the physical switches
had a limitation so we had no option but go for VLAN.

Currently this solution will support not more than 100 vlans  so  that’s considerable for



-----Original Message-----
From: Dag Sonstebo [] 
Sent: Friday, April 14, 2017 8:58 PM
Subject: Re: OVS Plugin

Hi Imran,

OVS is the same as GRE tunnelling, which you will have as an isolation method for guest networking
– see

Please let us know how you get on – especially how your hypervisor nodes cope with CPU load
once the GRE tunnels start growing in numbers (historically this has not scaled well).

Dag Sonstebo
Cloud Architect

On 13/04/2017, 21:37, "Imran Ahmed" <> wrote:

    Dear Team,
    I have setup cloudstack 4.9 with KVM hypervisor and advanced networking on
    CentOS7. Also we installed and setup openvswitch on the hypervisors (KVM)
    Below are traffic labels for kvm
    Cloudbr0  for management
    Cloudbr1 for guest
    Cloudbr2 for public 
    After configuring the zone, pod , cluster, host, primary and secondary
    storages we wanted to enable the OVS plugin under service providers for the
    guest network.
    However OVS is not shown in the list. 
    Please suggest what could be wrong here.
    Kind regards,
53 Chandos Place, Covent Garden, London  WC2N 4HSUK

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