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Networking
OpenStack provides a rich networking environment. This chapter details the requirements and options to consider when designing your cloud. This includes examples of network implementations to consider, information about some OpenStack network layouts and networking services that are essential for stable operation.
Warning
If this is the first time you are deploying a cloud infrastructure in your organization, your first conversations should be with your networking team. Network usage in a running cloud is vastly different from traditional network deployments and has the potential to be disruptive at both a connectivity and a policy level.
For example, you must plan the number of IP addresses that you need for both your guest instances as well as management infrastructure. Additionally, you must research and discuss cloud network connectivity through proxy servers and firewalls.
See the OpenStack Security Guide for tips on securing your network.
Networking (neutron)
OpenStack Networking (neutron) is the component of OpenStack that provides the Networking service API and a reference architecture that implements a Software Defined Network (SDN) solution.
The Networking service provides full control over creation of virtual network resources to tenants. This is often accomplished in the form of tunneling protocols that establish encapsulated communication paths over existing network infrastructure in order to segment tenant traffic. This method varies depending on the specific implementation, but some of the more common methods include tunneling over GRE, encapsulating with VXLAN, and VLAN tags.
design-networking/design-networking-concepts design-networking/design-networking-design design-networking/design-networking-layer2 design-networking/design-networking-layer3 design-networking/design-networking-services