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How to access an instance conncted to a VLAN

I recently installed Openstack pike (using packstack). Network configuration works fine(flat networks, instances works fine). I did the following tasks:

  • Multiple VLANs should be created (done)
  • each VLAN has an instance (done)
  • Instances should ping and access "Network equipment" in the same VLAN (also done)

Each instance should be accessed through ssh from an external network. I faced a problem achieving this because the instances belong to VLANs (one instance per VLAN). each instance has a floating IP from the appropriate VLAN (to be able to communicate with equipment from the same VLAN). Is there any solution to access the instance from a machine that did not belong to the VLAN. (I cannot associate two floating IPs to the same instance)

Thank you