A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Layer-3 virtual network overlays based on BGP Layer-3
VPNs
Author(s) : Dhananjaya Rao
John Mullooly
Rex Fernando
Filename : draft-drao-bgp-l3vpn-virtual-network-overlays-02.txt
Pages : 18
Date : 2013-07-15
Abstract:
Virtual network overlays are being designed and deployed in various
types of networks, including data centers. These network overlays
address several requirements including flexible network
virtualization and multi-tenancy, increased scale, and support for
mobility of virtual machines. Such overlay networks can be used to
provide both Layer-2 and Layer-3 network services to hosts at the
network edge. New packet encapsulations are being defined and
standardized to support these virtual networks. These
encapsulations, such as VXLAN and NVGRE, are primarily based on IP
and are currently defined to support a Layer-2 forwarding service.
BGP based Layer-3 VPNs, as specified in RFC 4364, provide an industry
proven and well-defined solution for supporting Layer-3 virtual
network services. However, RFC 4364 procedures use MPLS labels to
provide the network virtualization capability in the data plane.
With the increasing support for IP overlay encapsulations in data
center devices, there is a strong preference to utilize this support
to deploy Layer-3 virtual networks using the familiarpolicy and
operational primitives of Layer-3 VPNs.
This document describes the use of BGP Layer-3 VPNs alongwith the new
IP-based virtual network overlay encapsulations to provide a Layer-3
virtualization solution for all IP traffic, and specifies mechanisms
to use the new encapsulations while continuing to leverage the BGP
Layer-3 VPN control plane techniques and extensions. This mechanism
provides an efficient incremental solution to support forwarding for
IP traffic, irrespective of whether it is destined within or across
an IP subnet boundary.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-drao-bgp-l3vpn-virtual-network-overlays
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-drao-bgp-l3vpn-virtual-network-overlays-02
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-drao-bgp-l3vpn-virtual-network-overlays-02
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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