<tt><font size=2>Uwe Sauter <uwe.sauter.de@gmail.com> wrote on 04/25/2015
04:17:35 PM:<br>
<br>
> Or instead of using Linux bridges you could use a manually created
<br>
> OpenVSwitch bridge. This allows you to add "internal"<br>
> ports that could be used by Neutron like any other interface.<br>
> <br>
> - Create OVS bridge<br>
> - Add your external interface to OVS bridge<br>
> * If your external connection supports/needs VLANs, configure
<br>
> external interface as trunk<br>
> - Add any number of internal interfaces to OVS bridge<br>
> * Tag each interface with its VLAN ID, if needed<br>
> - Configure Neutron to use one internal interface for each subnet
<br>
> you'd like to use (no VLAN configuration required as<br>
> this happenes outside of Neutron)<br>
> <br>
> Regards,<br>
> <br>
> Uwe<br>
> <br>
> Am 25.04.2015 um 21:41 schrieb George Shuklin:<br>
> > Can you put them to different vlans? After that it would be very
easy task.<br>
> > <br>
> > If not, AFAIK, neutron does not allow this.<br>
> > <br>
> > Or you can trick it thinking it is (are) separate networks.<br>
> > <br>
> > Create brige (br-join), plug eth to it.<br>
> > Create to fake external bridges (br-ex1, br-ex2). Join them <br>
> together to br-join by patch links<br>
> > (</font></tt><a href="http://blog.scottlowe.org/2012/11/27/connecting-ovs-bridges-with-"><tt><font size=2>http://blog.scottlowe.org/2012/11/27/connecting-ovs-bridges-with-</font></tt></a><tt><font size=2><br>
> patch-ports/)<br>
> > <br>
> > Instruct neutron like there is two external networks: one on
br-<br>
> ex1, second on br-ex2.<br>
> > <br>
> > But be alert that this not very stable configuration, you need
to <br>
> maintain it by yourself.<br>
> > <br>
> > On 04/25/2015 10:13 PM, Mike Spreitzer wrote:<br>
> >> Is there a way to create multiple external networks from
<br>
> Neutron's point of view, where both of those networks are<br>
> >> accessed through the same host NIC? Obviously those
networks <br>
> would be using different subnets. I need this sort of<br>
> >> thing because the two subnets are treated differently by
the <br>
> stuff outside of OpenStack, so I need a way that a tenant<br>
> >> can get a floating IP of the sort he wants. Since Neutron
<br>
> equates floating IP allocation pools with external<br>
> >> networks, I need two external networks.<br>
> >><br>
> >> I found, for example, </font></tt><a href="http://www.marcoberube.com/archives/248---"><tt><font size=2>http://www.marcoberube.com/archives/248---</font></tt></a><tt><font size=2>
<br>
> which describes how to have multiple external<br>
> >> networks but uses a distinct host network interface for each
one.<br>
</font></tt>
<br><tt><font size=2>Now that I have found my bridge_mappings configuration
statement, I can return to thinking about what you said. It sounds
very similar to what George said --- it is just that you suggest an OVS
switch in place of George's br-join (which I had assumed was also an OVS
switch, since it is named like the others). Do I have this right?</font></tt>
<br>
<br><tt><font size=2>Thanks,</font></tt>
<br><tt><font size=2>Mike</font></tt>
<br>
<br>