[ovs-discuss] VXLAN support in OVS 2.5.0

Shravan S K sra9449 at gmail.com
Fri Jan 13 02:33:44 UTC 2017


Because of lack of hardware, I'm trying a vxlan setup on a single computer.
On 13-Jan-2017 04:47, "Scott Lowe" <scott.lowe at scottlowe.org> wrote:

> Please don't drop the list.
>
> Before we go down that path, can you help me understand what you're
> trying to achieve by building a VXLAN tunnel between two VMs on the same
> host?
>
>
>
> On 01/12/2017 10:15 AM, Shravan S K wrote:
> > I am not sure how to do the config for what you said.
> > Can you please explain how to configure the setup that you're suggesting
> ?
> >
> > Shravan
> >
> > On 12 January 2017 at 02:17, Scott Lowe <scott.lowe at scottlowe.org
> > <mailto:scott.lowe at scottlowe.org>> wrote:
> >
> >     On 01/11/2017 03:54 AM, Shravan S K wrote:
> >     > Like this?
> >     > vm01-------------------|
> >     > |------------------vm03
> >     >
> >     > br1(vxlanport1)------------br-int1=================br-int2--
> --------(vxlanport2)br2
> >     > vm02-------------------|
> >     > |-------------------vm04
> >     >
> >     > What is the need for the bridges br-int1 and br-int2? Why is it not
> >     > possible without them(as the topology shown earlier in this
> thread)?
> >
> >
> >     [SL] No, I don't think this is the configuration you'd want to use.
> The
> >     "br-int" bridges aren't strictly required; you could use br1 and br2.
> >     The trick here---as you're trying to create a VXLAN tunnel within a
> >     host---would be that you'll need 2 IP endpoints (one for each end of
> the
> >     tunnel), and you'd need each bridge with a VXLAN port to be
> associated
> >     with one of those IP endpoints.
> >
> >     As I said, though, I haven't tested a configuration like this.
> Further,
> >     to be honest, I'm not really sure what you're trying to accomplish
> with
> >     such a configuration.
> >
> >
> >     > Shravan
> >     >
> >     > On 11 January 2017 at 11:59, Scott Lowe <scott.lowe at scottlowe.org
> <mailto:scott.lowe at scottlowe.org>
> >     > <mailto:scott.lowe at scottlowe.org <mailto:scott.lowe at scottlowe.org>>>
> wrote:
> >     >
> >     > Please see my response inline, prefixed with [SL].
> >     >
> >     >
> >     > On 01/10/2017 09:50 PM, Shravan S K wrote:
> >     >> I am asking if that can be done on a single physical host having
> >     >> OVS. Say, as mininet creates bridges which act as switches. Can
> >     >> vxlan be setup using Mininet?
> >     >
> >     >
> >     > [SL] I don't know if it's possible for Mininet to set up VXLAN;
> >     > that's a question best asked on a Mininet-related forum.
> >     >
> >     > As for whether it can be done on a single host, I suppose if you
> were
> >     > to use 2 separate bridges for physical connectivity along with 2
> >     > separate bridges for the tunnels, it might work. I've never tried
> it,
> >     > though, so this is just conjecture.
> >     >
> >     >
> >     >> Shravan
> >     >>
> >     >> On 10 January 2017 at 23:33, Scott Lowe <scott.lowe at scottlowe.org
> <mailto:scott.lowe at scottlowe.org>
> >     <mailto:scott.lowe at scottlowe.org <mailto:scott.lowe at scottlowe.org>>
> >     >> <mailto:scott.lowe at scottlowe.org
> >     <mailto:scott.lowe at scottlowe.org> <mailto:scott.lowe at scottlowe.org
> >     <mailto:scott.lowe at scottlowe.org>>>> wrote:
> >     >>
> >     >> Please see my response below.
> >     >>
> >     >>
> >     >> On 01/10/2017 02:26 AM, Shravan S K wrote:
> >     >>> Is it possible to create a VXLAN setup using just bridges created
> >     >>> by OVS? (using ovs-vsctl to create these bridges,ports and vxlan
> >     >>> config)
> >     >>>
> >     >>> vm01-------------------|             |------------------vm03
> >     >>>                           br1-------br2
> >     >>> vm02-------------------|             |-------------------vm04
> >     >>
> >     >>
> >     >> Yes, this is possible. On each hypervisor where OVS is running and
> >     >> where you have VMs you'd like to connect over VXLAN tunnels,
> create
> >     >> a bridge ("br-tun", for example). Create and configure a VXLAN
> port
> >     >> appropriately on br-tun on each hypervisor, and then connect your
> >     >> VMs. You should be good to go. My website has an example of doing
> >     >> this with GRE; VXLAN should be nearly identical.
> >     >>
> >     >> Hope this helps,
> >
> >
> >     --
> >     Scott
> >
> >
> >
>
>
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