[ovs-discuss] VXLAN support in OVS 2.5.0
Raymond Burkholder
ray at oneunified.net
Fri Jan 13 02:36:31 UTC 2017
Try running VirtualBox, and build two guests with shared networking. That will get you an appropriate simulation of computer to computer vxlan mechanisms.
From: ovs-discuss-bounces at openvswitch.org [mailto:ovs-discuss-bounces at openvswitch.org] On Behalf Of Shravan S K
Sent: Thursday, January 12, 2017 22:34
To: Scott Lowe <scott.lowe at scottlowe.org>
Cc: ovs-discuss at openvswitch.org
Subject: Re: [ovs-discuss] VXLAN support in OVS 2.5.0
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 <mailto: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>
> <mailto: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> >
> > <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 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> >>
> >> <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 <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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