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Answer by Amber for I've deployed Openstack using RedHat's Packastack allinone option on Centos7. I then followed the instructions at https://openstack.redhat.com/Neutron_with_existing_external_network to use my existing external network. Next, I created a private network for the admin project with a range of 192.168.13.0/24. I then started up a guest in the admin project, and it was allocated an IP from this range (192.168.13.2). However, when I come to associate a floating IP with this guest so that I can access it internally, I am receiving a message saying "No Ports Available". I am able to select an IP address from the pool that I setup when following the document above. Can anyone advise what I have to do in order to complete this setup and map floating IPs to my compute instances on the private network please ?

Next: Answer by pvinodp for I've deployed Openstack using RedHat's Packastack allinone option on Centos7. I then followed the instructions at https://openstack.redhat.com/Neutron_with_existing_external_network to use my existing external network. Next, I created a private network for the admin project with a range of 192.168.13.0/24. I then started up a guest in the admin project, and it was allocated an IP from this range (192.168.13.2). However, when I come to associate a floating IP with this guest so that I can access it internally, I am receiving a message saying "No Ports Available". I am able to select an IP address from the pool that I setup when following the document above. Can anyone advise what I have to do in order to complete this setup and map floating IPs to my compute instances on the private network please ?
I just met the same issue and fixed it as the following way. Check the setting of your router.( I assumed you already have the **public** network, the **private** network, and the **routers**.) log in as guest, in the project tab, open the Network dropdown menu and select the Rourter, click the Set Gateway button in the router row. In the External Network menu, choose public. click the set gateway button. still in the Router subtab, click the router, +Add interface. in the subnet menu, select your private network, click the add interface button. Verify that both networks are attached to the router. In the Network tab, choose the Network Topology. private and public should both connect to the router.

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