Open Stack

On 1/22/19 1:56 PM, Farhad Sunavala wrote:
> Hi,
> 
> 
> I am open to suggestions.
> We have a need to switch traffic from our project to other projects 
> without first getting out
> on the internet, floating IPs, etc.
> 
> The other projects will be sharing their networks with our project.
> As shown in figure below, the orange network belongs to our project 
> (10.0.0.0/26)
> 
> The green network (172.31.0.0/24) belongs to another project
> and
> has an overlapping network with the red tenant (172.31.0.0/16)
> 
> For now, the solution is to create VMs in our project and make sure none 
> of the interfaces
> having overlapping CIDRs.  Thus, there is a VM attached to the 'orange' 
> and 'red' nets
> and another VM attached to the 'orange' and 'green' nets.
> 
> Problem: Too much resources (VMs) will need to be created if we have 100 
> tenants with overlapping networks.
> 
> Solution:
> Is there a way I can minimize VM resource in our project by not 
> allocating a separate VM
> for shared networks with overlapping CIDRs?

Have you tried setting allow_overlapping_ips=False in neutron.conf and 
restarting the server?

-Brian