Hi Alexandre,

VXLAN on KVM works very well and we've had it in production for a number of 
years now.


Please see this document on how it is implemented: 
https://cwiki.apache.org/confluence/display/CLOUDSTACK/Linux+native+VXLAN+support+on+KVM+hypervisor

Cloudstack does create all the VXLAN configuration for each new network, you  
just need to have a working underlay that supports multicast (e.g. an IP on the 
VXLAN interface and iptables rules rules that allow multicast traffic).
We place our VXLANs into a VLAN and expose that VLAN via a KVM traffic label to 
the VXLAN guest network.

- Si



________________________________
From: Alexandre Bruyere <bruyere.alexan...@gmail.com>
Sent: Wednesday, November 14, 2018 10:32 AM
To: users@cloudstack.apache.org
Subject: Information on VXLAN implementations (and other guest isolation 
methods)

Hello.

I'm currently investigating guest isolation methods for a project. The idea
was thrown about to use VXLANs, but it's rather fuzzy on how it actually is
implemented.

Does Cloudstack automatically create and maintain VXLAN connections, or
does it ride off an already-implemented VXLAN system configured under the
hood?

And what would be the use cases for VXLANs? Would it be appropriate to use
in a small-scale network for hybrid clusters? If not, what would the
Cloudstack community recommend?

Thanks for your time!

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