On Wed, Feb 26, 2020 at 11:49 AM Adam Peacock <alawson@aqorn.com> wrote:
Hey folks,

So I caught wind from a friend/colleague that allowing duplicate IP's in each tenant was now only achievable by creating a separate tenant network+subnet and assigning them separately to each individual tenant. This doesn't seem right to me and it doesn't scale.

Looking for this:
  • tenant-network-id = abc (shared)
    • tenant1
      • vm1: 10.0.0.10
    • tenant2
      • vm1: 10.0.0.10
Am I missing something and this setup is no longer supported?
I hope I'm wrong but I can't find documentation that speaks to this specifically so would appreciate a link if anyone has it handy.

Thanks!

//adam

Adam Peacock

Principal Architect
Office: +1-916-794-5706
 
That has never been supported. It is not feasible to have two VMs on the same network+subnet that have the same IP, even if they are owned by different tenants. That isn't a Neutron limitation, that's a limitation of IP-over-Ethernet that applies to all networks.

Think of the non-virtualized equivalent, if you had a physical network subnet with two computers using the same IP address there would be a conflict, even if one computer was owned by Alice and the other computer was owned by Bob. There is no way to make that work in a virtualized cloud environment unless the two tenants are using different network subnets.

--
Dan Sneddon         |  Senior Principal Software Engineer
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