We have seen that Subnet is a part of the core functionality in OpenStack Networking. The Subnet entity drives the IP address assignment and DHCP servers for the virtual machine instances. In this chapter, we will share the following recipes that will cover the IP address management capabilities in Neutron:
Creating an instance with a specific IP address
Configuring multiple IP addresses for a virtual interface
Creating a redundant DHCP server per OpenStack Network
Starting the DHCP server on a specific network node
Increasing the number of IP addresses in a Network using the Horizon dashboard