Hi Remi, I really apprecciate your comments.
If i have understood correctly, it is possible to use OVS with STT tunnels over CS. Is that correct? David -----Mensaje original----- > De: "Remi Bergsma" <rberg...@schubergphilis.com> > A: users@cloudstack.apache.org > Fecha: 05/11/2015 09:52 > Asunto: Re: Re[2]: GRE Isolation Performance > > Hi David, > > STT support was added to mainstream OVS only a few months ago, last summer. > Before that you had to patch it in. > > To be honest, in 2012 when we started using this, STT was the only option > that could use the offloading of the nic. Today, VXLAN also is able to do > that. For new deployments, that is the way forward as it is widely adopted > and supported. > > I never tried VXLAN without a controller, but it is worth investigating. For > sure Nicira and Nuage support it. > > We might consider dropping GRE support, but that's more of a subject for the > dev list. If you have stats/performance details to share, that might help > showing it is not a real option any more for production deployments. > > Regards, Remi > > Sent from my iPhone > > > On 05 Nov 2015, at 08:19, David Amorín <david.amo...@adderglobal.com> wrote: > > > > It looks VXLAN and STT are currently the best options. If OVS has support > > for STT tunnels, why CS doesn't support this configuration? > > > > David > > > > > > -----Mensaje original----- > >> De: "Remi Bergsma" <rberg...@schubergphilis.com> > >> A: users@cloudstack.apache.org > >> Fecha: 04/11/2015 20:29 > >> Asunto: Re: GRE Isolation Performance > >> > >> Hi David, > >> > >> I haven’t used GRE myself, but I do know that performance wise you need > >> something that offloads to the nic, as with vlan tagging (instead of > >> having the cpu do all the work). Did you consider VXLAN? That has nic > >> offloading support in most nics these days. We are using STT (also does > >> offloading) with Nicira and it is very fast. If I had to build again, I’d > >> investigate VXLAN. > >> > >> > >> > >> Regards, > >> Remi > >> > >> > >>> On 04/11/15 12:31, "David Amorín" <david.amo...@adderglobal.com> wrote: > >>> > >>> Hi all, > >>> We are working in an environment with CS 4.5.2 / XenServer 6.5 with > >>> multiple zones (Spain and Netherlands) using GRE Isolation and we have > >>> some concerns that we would like to share with you. Basically, we make a > >>> CPU benchmark between VLAN isolation and GRE isolation and the results > >>> show us that the consumption of CPU with GRE isolation is too much > >>> compared with VLAN isolation. > >>> > >>> > >>> Can anyone share with us the experience working with GRE isolation? > >>> > >>> > >>> We are not sure if this configuration in production will be safe, > >>> scalable and with an acceptable level of performance. > >>> > >>> > >>> Thanks, > >>> > >>> > >>> David > >
