1.
OPENSTACK NEUTRON
& INTERCONNECTIONS WITH
BGP/MPLS VPNS
Paul Carver Tim Irnich Thomas Morin

2.
NFV
POPs
A NEED TO INTERCONNECT OPENSTACK AND BGP/MPLS VPNS
BGP/MPLS VPNs:
• a key building block for backbone network engineering
• the foundation for operators VPN services
How to drive interconnections between Openstack and BGP/MPLS VPNs ?
public
cloud
IP/MPLS
backbones
core & access
NFV
POPs
internal cloud
platforms &
OSS
business,
mobile,
residential
customers
existing BGP VPN
deployments
and new uses for
NFV and inter-DC

3.
ONCE UPON A TIME…
 Back in 2012…
 Some SDN controllers had support to create connectivity with BGP VPNs
 each with its own API
 not multi-tenant APIs
 Between 2012 and 2014… some unsuccessful attempts at bringing
the ability to interconnect BGPVPNs into Quantum/Neutron…
 by NTT (Nati Ueno), Contrail (Pedro Marques), Orange
 Neutron community not yet familiar enough with this “Telco stuff”
 Neutron less modular technically and organizationally
 hard to meet the “light reference implementation” criteria
 This changed in 2015 !

4.
NETWORKING-BGPVPN INCEPTION
Early 2015
 Neutron became more modular
 Openstack ‘Big Tent’ and Neutrons Stadium
 Growing awareness of Telco things in Neutron’s community
June 2015
 group of interested contributors, including…
 Orange, Ericsson, AT&T, Cloudwatt
 early API draft refined based on past attempts
 an early API+driver implementation made opensource
 networking-bgpvpn was created in Neutron “Stadium”
Since…
 Releases for Liberty, Mitaka, Newton
 Backports for Juno and Kilo
 Steadily improving and extending

5.
CURRENT STATUS
Newton release of networking-bgpvpn: October 13th 2016
base features:
• BGPVPN definitions
• L2
• L3
• Network associations, Router associations
• Neutron CLI support
includes drivers for:
• Neutron ML2/OpenVSwitch (with bagpipe)
• OpenDaylight
• OpenContrail
• Nuage Networks (out of tree)
additional features:
• full Heat binding
• Horizon GUI
• Tempest suite

6.
NEUTRON BGP VPN INTERCONNECTIONS SERVICE PLUGIN
OVERVIEW
Neutron
BGP
Peers
dataplane
(vswitch/ vrouter)
VMs… …
Backend X
(e.g. Neutron+Bagpipe, OpenDaylight,
OpenContrail, Nuage, etc.)API
BGPVPN
Service Plugin


packets carried
over MPLS
to/from VPNs

BGP
VPN
routes


driver for
X…
?

7.
Neutron
SDN Controller
BGP
Peers
driver for
backend X
packets carried
over MPLS
to/fromVPNs
API
BGPVPN
Service Plugin

 REST
BGP
VPN
routes


HOW IT WORKS WITH AN SDN CONTROLLER…
E.G. OPENDAYLIGHT, OPENCONTRAIL, NUAGE NETWORKS, ETC.
driver for SDN
Controller X
compute node
VMs VMs
compute node
VMs VMs
vswitch vswitch

NBI
BGP
SBI

8.
HOW IT WORKS WITH NEUTRON OVS + BAGPIPE …
Neutron
compute node
BGP
Peers
…VMs …
API
BGPVPN
Service Plugin

OpenVSwitch
br-int | br-tun | br-mpls
packets carried
over MPLS
towards VPNs

Neutron OVS
agent
BGP
VPN
routes



bagpipe
BGP
bagpipe
driver
RabbitMQML2 as Core Plugin
openvswitch
mech driver
bagpipe
extension

9.
NEW API RESOURCES
(already existing
API resources)
Network X Router Ysome user in
“Project Lambda”
Openstack Admin
Network
Associationcreates
associations
to setup
interconnections
BGP VPN
“default VPN”
Type: L3
BGP Route-Target: 1234:42
Tenant: Project Lambda
Router
Association
creates a
BGPVPN
and gives it to
“Project Lambda”

10.
OPENSTACK NET’-BGPVPN AND OPNFV SDNVPN
 OPNFV: a midstream integration project
providing automated install of all
required components for a given use
case,
as well as E2E testing of the said use
case
• BGPVPN is such a use case
• gives upstream projects additional visibility
if their changes break something at system
level
(i.e. when multiple components interplay)
 The OPNFV SDNVPN project aims at
integrating a complete stack for
BGPVPNs, focusing on cases where an
SDN Controller is used
• however a Neutron/BaGPipe scenario is
planned as well

11.
COMPONENTS AND INTERFACES
On top of baseline ODL-based OPNFV
deployment
 Deploy BGPVPN API extension,
service plugin and Heat extensions
 Activate relevant VPN features in
Open Daylight
 Configure the stack
Supported OPNFV installers
 Fuel
 Apex / TripleO
Deployment scenarios and options
 HA and non-HA (=redundant
OpenStack controller)
 Can be deployed nested/bare-metal DPNDPN
Neutron
Ext. APIsCore Neutron API BGPVPN API extension
BGPVPN Service
Generic Plugin
ODL
driver
Other
backend
specific
plugins
ML2 Plugin
ODL
MD
OpenDaylight Neutron NB
BGPVPN
Yang ext.
ML2
Yang
Netvirt
L2 E-LAN
Service
L3-VPN
ServiceOF PluginOVSDB
DPN
Driver
B
Driver
C

12.
OPNFV DEPLOYMENT SCENARIOS
 OPNFV deployment scenario = essentially a specific stack
plus configuration that
 OPNFV installers can auto-deploy and
 That gets automatically tested in OPNFV CI
 Baseline scenarios maintained by installers
 “NoSDN” = just OpenStack with OVS & Neutron agent
 ODL_L2 = L2 networking done by ODL (ML2 plugin)
 ODL_L3 = ODL L3Router replaces L3Router, so L2/L3
networking handled by ODL
 SDNVPN scenario: derived from ODL_L3

13.
DEMO: HOW TO DEPLOY OPNFV BGPVPN
At the example of Fuel installer
 If you’re interested in doing the same with Apex, come see us after the show
Prerequisites:
 Fuel already deployed in a VM (using OPNFV Colorado 1.0 iso)
 VMs for compute nodes running & detected by Fuel
 Linux bridges for infra networks deployed
Step 1: Check plugins
Step 2: Create environment
Step 3: Activate feature plugins
Step 4: hit deploy & get some popcorn
Step 5: test the system (manually or by running OPNFV test suites)

14.
WRAP UP
 One API to allow tenants to control interconnections with
their BGP VPNs
• Public/operator cloud <-> business customers of MPLS VPN offers
• inter-DC, distributed cloud, edge cloud
• NFV multi-POP deployments
 Drivers for multiple SDN controllers and a Neutron implementation
 CLI interface, Horizon GUI, and Heat bindings
 Now / Soon / On the radar:
• complete E-VPN part of API
• remaining work to match Neutron Stadium requirements (more functional testing!)
• API evolution for finer-grained control of routing
(static routes, preferences, route leaking)
• consider supporting multiple drivers/backends simultaneously
• see MPLS/GRE support land in OpenVSwitch (next MPLS/UDP!)
• expectations of improved feature parity among drivers
 Neutron’s Stadium project working hand in hand
with its OPNFV counterpart
OpenStack / OPNFV
contributors around BGP
VPN…
Antoine Eiche
Bruno Fernando
Édouard Thuleau
Cédric Savignan
Daniel Radez
Darek Smiegel
Henry Gessau
Jean-Philipe Braun
Mathieu Rohon
Michal Skalski
Nikolas Hermanns
Nishant Kumar
Paul Carver
Peter V. Saveliev
Pierre Crégut
R. R. Palleti
Suresh K.
Tim Irnich
Tim Rozet
Thomas Monguillon
Thomas Morin
Vishal Thapar
Wim De Clercq
Yannick Thomas