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From "David Amorín" <david.amo...@adderglobal.com>
Subject Re[2]: GRE Isolation Performance
Date Thu, 05 Nov 2015 07:19:41 GMT
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" <RBergsma@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.amorin@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
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >


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