[ovs-discuss] Why VXLAN setting for OVS needs remote IP option?

Zang MingJie zealot0630 at gmail.com
Fri Jul 5 14:28:26 UTC 2013


The vxlan of ovs doesn't follow the spec, it doesn't implement the
control plane, only packet encapsulation, you need other control plane
concept like openflow. Linux kernel (>3.8) includes another
implementation which follows the spec.

On Fri, Jul 5, 2013 at 4:18 PM, JinHwan Hwang <calanchue at gmail.com> wrote:
> http://networkstatic.net/configuring-vxlan-and-gre-tunnels-on-openvswitch/
>
> using GRE
> ovs-vsctl add-port br1 gre1 -- set interface gre1 type=gre
> options:remote_ip=192.168.1.10
> ovs-vsctl add-port br1 gre1 -- set interface gre1 type=gre
> options:remote_ip=192.168.1.11
>
> using VXLAN
> ovs-vsctl add-port br1 vx1 -- set interface vx1 type=vxlan
> options:remote_ip=192.168.1.10
> ovs-vsctl add-port br1 vx1 -- set interface vx1 type=vxlan
> options:remote_ip=192.168.1.11
>
> I found that VXLAN setting use very similar setting with GRE version. That
> makes me confusing about VXLAN concept. As i read through googling(I haven't
> used it before), VXLAN use IP multicast, and IP multicast needs a multicast
> group address, not a specific IP of a node. How VXLAN things works at OVS? I
> could assume that there exists some default multicast group address. But if
> it is the case, why do i need to fill specific remote address?
> If VXLAN needs a specific IP of a node, how can i construct vxlan network
> consist of several nodes? Do i need to set up full-mesh setting for each
> node?
>
> thanks for your help
>
> ps. Are there any documents about using vxlan in ovs? I can't find any
> things about vxlan in man page. I want to look through options for using
> vxlan.
>
>
>
>
>
>
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