A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Service Function Chains Using Virtual Networking
Authors : Stuart Mackie
Bruno Rijsman
Maria Napierala
Diego Daino
Diego R. Lopez
Daniel Bernier
Walter Haeffner
Filename : draft-mackie-sfc-using-virtual-networking-02.txt
Pages : 44
Date : 2014-10-17
Abstract:
This document describes how service function chains (SFC) can be
applied to traffic flows using routing in a virtual (overlay)
network to steer traffic between service nodes. Chains can include
services running in routers, on physical appliances or in virtual
machines. Service chains have applicability at the subscriber edge,
business edge and in multi-tenant datacenters. The routing function
into SFCs and between service functions within an SFC can be
performed by physical devices (routers), be virtualized inside
hypervisors, or run as part of a host OS.
The architecture uses a controller to calculate and install routes
to implement an SFC, based on a topological model of the chain and
knowledge of the network addresses that should pass through the
chain. An advantage of the approach is that SFCs can be implemented
without alteration to today's BGP standard, and without change to
the current operation of routers.
Service chains need to support load balancing between network
functions, and symmetric forward and reverse paths are required when
stateful services are involved. This document shows how these
requirements can be met by using VRFs at the ingress and egress of
each service instance and by performing load balancing after the
egress of each service as part of the routing function.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-mackie-sfc-using-virtual-networking/
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-mackie-sfc-using-virtual-networking-02
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-mackie-sfc-using-virtual-networking-02
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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