Demonstrating traffic flow from an instance to the Internet

To demonstrate the process of creating and connecting standalone Neutron routers to both tenant and external provider networks so as to provide network connectivity to instances, this section of the chapter is dedicated to a walkthrough that leverages the fundamental Neutron concepts that have been discussed in the book so far.

A VLAN provider network will be created and used as an external gateway network for the Neutron router, while a VLAN tenant network will be created and used by instances. A Neutron router will be created and used to route traffic from the instances in the tenant network to the Internet, and floating IPs will be created and used to provide direct connectivity to instances.

Setting the foundation

In this demonstration, a Cisco Adaptive Security Appliance (ASA) device serves as the physical network gateway device and is connected to the Internet. The inside interface of the Cisco ASA device has a configured IP...