Hi Wei Zhou, OVS with VLAN is okay for us, we dont need GRE. Did Wido send an email? I didn’t receive it...
We were thinking of accelerating the network by using a kernel bypass functionality of our Network Card. The network cards documentation states we can do so by using ‘KVM Libvirt Direct Passthrough’ architecture. This is where we use a libvirt direct‐passthrough configuration, and vNICs (NIC to multiple vNIC using SR-IOV) are used in KVM host to provide network acceleration for guest VMs. The guest continues to use a paravirtualized driver and is unaware this is backed with a vNIC from the network adapter. But this requires the Guest VMs VirtIO-NET to talk to macvtap. Then, the macvtap talks to the vNIC. As I understand, Cloudstack default uses KVM bridge for networking and was hoping that OpenVSwitch can be used to achieved the ‘KVM Libvirt Direct Passthrough’ architecture instead. Regards, Bryan On 4 Feb 2025 at 6:17 PM +0800, Wei ZHOU <ustcweiz...@gmail.com>, wrote: > Hi, > > I tested OVS some weeks ago. > > OVS with VLAN isolation works well in my testing. There are some issues > when tested OVS with GRE isolation. > > Similar concern as Wido, does OVS increase the network performance ? > > > -Wei > > > > On Tue, Feb 4, 2025 at 2:05 AM Bryan Tiang <bryantian...@hotmail.com> wrote: > > > Hey Guys, > > > > Does anyone have any experience using OpenVSwitch with Cloudstack? Is it > > actively maintained? > > > > We are using native bridges now with KVM. > > > > Have some scenarios where we need to accelerate the networking in our > > cloud. > > > > We were thinking to pass GuestVM traffic to the NIC or vNIC (SR IOV) , but > > the closest we can find to being able to that on Cloudstack was OpenVswitch. > > > > But we’re not sure if features like VPC, Autoscaling, Live Migration, > > would still work as those are pretty important to us. > > > > Would using OVS also not be compatible with any future enhancements of > > Cloudstack? > > > > Regards, > > Bryan > >
