Re: [ovs-discuss] Turn bridge into a HUB

[Luiz Angelo Daros de Luca]

Thanks!

Both did the trick. I only changed flood_vlans to flood_vlans=0-4095 to
include untagged vlans

Regards,


Em ter, 20 de mar de 2018 às 17:14, Ben Pfaff  escreveu:

> By default, VLAN tags will be preserved.
>
> If you don't need any MAC learning, then you could omit the
> priority=5 flow I listed, if you go that route.
>
> On Tue, Mar 20, 2018 at 04:30:38PM +, Luiz Angelo Daros de Luca wrote:
> > Thanks Ben,
> >
> > And how about vlan tags? Will it preserve them? Or should I set a "native
> > vlan" for both in and out ports?
> >
> > There is no "regular vlan" on this bridge. It is for flooding only.
> >
> > Em seg, 19 de mar de 2018 às 17:31, Ben Pfaff  escreveu:
> >
> > > On Mon, Mar 19, 2018 at 07:58:40PM +, Luiz Angelo Daros de Luca
> wrote:
> > > > Hello,
> > > >
> > > > I have a physical port receives traffic from mirrored ports in a
> physical
> > > > (core) switch. I would like to pass these packets to multiple VMs
> (xen),
> > > > replicating vlan tags when existing.
> > > >
> > > > With linux bridges, I set aging to 0 and, as it does not understand
> vlan
> > > > tags, everything works. Now I want to setup the same situation with
> ovs.
> > > > I'm still a newbie with ovs.
> > > >
> > > > Xen uses the /etc/xen/scripts/vif-openvswitch that allows me to
> specify
> > > tag
> > > > and trunk argument when a vm port is added (not much besides that).
> As I
> > > > might receive multiple vlans, I would like to not list all of them.
> > > >
> > > > I saw that flood_vlans might be useful. I simply need to flood all
> > > traffic
> > > > from the physical port on every other port but the physical one,
> > > > replicating vlan tags.
> > >
> > > You could set this up with flood_vlans, but you would have to list the
> > > vlans.  ovs-vsctl supports ranges, so you could probably do this
> easily,
> > > e.g.:
> > > ovs-vsctl set bridge br0 flood_vlans=1-4095
> > >
> > > Another way to do this would be to add flows or to use a controller to
> > > add flows.  All you really need is a high-priority flow that does
> normal
> > > processing for your "regular vlan" and another one that falls back to
> > > flooding, e.g.:
> > >
> > > priority=5, vlan_vid=1234, actions=normal
> > > priority=4, actions=flood
> > >
> > --
> >
> > Luiz Angelo Daros de Luca
> > luizl...@gmail.com
>
-- 

Luiz Angelo Daros de Luca
luizl...@gmail.com
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Re: [ovs-discuss] Turn bridge into a HUB

[Ben Pfaff]

On Mon, Mar 19, 2018 at 07:58:40PM +, Luiz Angelo Daros de Luca wrote:
> Hello,
> 
> I have a physical port receives traffic from mirrored ports in a physical
> (core) switch. I would like to pass these packets to multiple VMs (xen),
> replicating vlan tags when existing.
> 
> With linux bridges, I set aging to 0 and, as it does not understand vlan
> tags, everything works. Now I want to setup the same situation with ovs.
> I'm still a newbie with ovs.
> 
> Xen uses the /etc/xen/scripts/vif-openvswitch that allows me to specify tag
> and trunk argument when a vm port is added (not much besides that). As I
> might receive multiple vlans, I would like to not list all of them.
> 
> I saw that flood_vlans might be useful. I simply need to flood all traffic
> from the physical port on every other port but the physical one,
> replicating vlan tags.

You could set this up with flood_vlans, but you would have to list the
vlans.  ovs-vsctl supports ranges, so you could probably do this easily,
e.g.:
ovs-vsctl set bridge br0 flood_vlans=1-4095

Another way to do this would be to add flows or to use a controller to
add flows.  All you really need is a high-priority flow that does normal
processing for your "regular vlan" and another one that falls back to
flooding, e.g.:

priority=5, vlan_vid=1234, actions=normal
priority=4, actions=flood
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