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See https://docs.openstack.org/install-guide/launch-instance-networks-provider.html#create-the-provider-network. I agree it’s not that simple. The below is from memory; I hope it’s correct:

Q1: The document says

Replace DNS_RESOLVER with the IP address of a DNS resolver. In most cases, you can use one from the /etc/resolv.conf file on the host.

If the host has access to a DNS server on the internet, that works as well.

Q2: Not a random number, but

Replace PROVIDER_NETWORK_GATEWAY with the gateway IP address on the provider network, typically the “.1” IP address.

Q3: The allocation pool is necessary for floating IPs and anything that you connect to the network directly.

Q4: Without a subnet, ports connected to the network can’t have IP addresses. Therefore, you need it.

See https://docs.openstack.org/install-guide/launch-instance-networks-provider.html#create-the-provider-network. I agree it’s not that simple. The below is from memory; I hope it’s correct:

See https://docs.openstack.org/install-guide/launch-instance-networks-provider.html#create-the-provider-network.

Q1: The document says

Replace DNS_RESOLVER with the IP address of a DNS resolver. In most cases, you can use one from the /etc/resolv.conf file on the host.

If the host has access to a DNS server on the internet, that works as well.

Q2: Not a random number, but

Replace PROVIDER_NETWORK_GATEWAY with the gateway IP address on the provider network, typically the “.1” IP address.

Q3: The allocation pool is necessary for floating IPs and anything that you connect to the network directly.

Q4: Without a subnet, ports connected to the network can’t have IP addresses. Therefore, you need it.

I agree it’s not that simple. The below is from memory; I hope it’s correct:

See Answers 1 and 2 are based on https://docs.openstack.org/install-guide/launch-instance-networks-provider.html#create-the-provider-network.

Q1: The document says

Replace DNS_RESOLVER with the IP address of a DNS resolver. In most cases, you can use one from the /etc/resolv.conf file on the host.

If the host has access to a DNS server on the internet, that works as well.

Q2: Not a random number, but

Replace PROVIDER_NETWORK_GATEWAY with the gateway IP address on the provider network, typically the “.1” IP address.

Q3: The allocation pool is necessary for floating IPs and anything that you connect to the network directly.

Q4: Without a subnet, ports connected to the network can’t have IP addresses. Therefore, you need it.

I agree it’s not that simple. The below is from memory; I hope it’s correct:

Answers 1 and 2 are based on https://docs.openstack.org/install-guide/launch-instance-networks-provider.html#create-the-provider-network.

Q1: The document says

Replace DNS_RESOLVER with the IP address of a DNS resolver. In most cases, you can use one from the /etc/resolv.conf file on the host.

If the host has access to a DNS server on the internet, that works as well.

Q2: Not a random number, but

Replace PROVIDER_NETWORK_GATEWAY with the gateway IP address on the provider network, typically the “.1” IP address.

Q3: The allocation pool is necessary for floating IPs and anything that you connect to the network directly.directly, including instances and routers.

Q4: Without a subnet, ports connected to the network can’t have IP addresses. Therefore, you need it.