Requirements and Use Cases for Virtual Network Functions
2014
Network function appliances such as subscriber termination, firewalls,
tunnel switching, intrusion detection, and routing are currently
provided using dedicated network function hardware. As network
function is migrated from dedicated hardware platforms into a
virtualized environment, a set of use cases with application specific
resilience requirements begin to emerge. These use cases and
requirements cover a broad range of capabilities and objectives, which
will require detailed investigation and documentation in order to
identify relevant architecture, protocol and procedure solutions to
ensure reliance of user services using virtualized functions. This
document provides an analysis of the key reliability requirements for
applications and functions that may be hosted within a virtualized
environment. These NFV engineering requirements are based on a variety
of uses cases and goals , which include reliability scalability,
performance, operation and automation. Note that this document is not
intended to provide or recommend protocol solutions.
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