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