Virtual Network System: Splitting Control and Data Plane to Optimize IP and Transport Services at...

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Virtual Network System: Splitting Control and Data Plane

to Optimize IP and Transport Services at Minimum OPEX

Elisa Bellagamba

[email protected]

mailto:[email protected]

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text in the footer area

Trends & driving forces

50B Connections

Mobile Traffic Growth

Internet bandwidth growth

Personal, mobile cloud services

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MOBILE

CORE

MULTI-SERVICE

EDGE

MOBILE

FIXED

CORE DEVICES ACCESS AGGREGATION IP EDGE

TRANSPORT & ROUTING BACKHAUL & METRO

Rapid change carries a cost

Capacity =

ƒn (demand) +

ƒn (performance)

Dealing with Scale Capacity =

ƒn (demand) +

ƒn (performance)

Network costs =

ƒn (traffic growth)

MUST BREAK THIS!

Lowering Costs Capacity =

ƒn (demand) +

ƒn (performance)

Revenue =

ƒn (competition) +

ƒn (content ownership)

Creating Revenue Capacity =

ƒn (demand) +

ƒn (performance)

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MOBILE

CORE

MULTI-SERVICE

EDGE

MOBILE

FIXED




Capacity =

ƒn (demand) +

ƒn (performance)


ƒn (demand) +

ƒn (performance)

Network costs =


MUST BREAK THIS!


ƒn (demand) +

ƒn (performance)

Revenue =

ƒn (competition) +



ƒn (demand) +

ƒn (performance)

How to extend IP services

up to the access?

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MOBILE

CORE

MULTI-SERVICE

EDGE

MOBILE

FIXED




Capacity =

ƒn (demand) +

ƒn (performance)


ƒn (demand) +

ƒn (performance)

Network costs =


MUST BREAK THIS!


ƒn (demand) +

ƒn (performance)

Revenue =

ƒn (competition) +



ƒn (demand) +

ƒn (performance)


up to the access?

Upgrade

boxes to

full IP?

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minimum 24 pt

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MOBILE

CORE

MULTI-SERVICE

EDGE

MOBILE

FIXED




Capacity =

ƒn (demand) +

ƒn (performance)


ƒn (demand) +

ƒn (performance)

Network costs =


MUST BREAK THIS!


ƒn (demand) +

ƒn (performance)

Revenue =

ƒn (competition) +



ƒn (demand) +

ƒn (performance)


up to the access? Train the whole

personnel to

build IP

competence? TDM TDM

TDM TDM

TDM TDM TDM TDM

TDM TDM TDM

TDM TDM TDM TDM

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MOBILE

CORE

MULTI-SERVICE

EDGE

MOBILE

FIXED




Capacity =

ƒn (demand) +

ƒn (performance)


ƒn (demand) +

ƒn (performance)

Network costs =


MUST BREAK THIS!


ƒn (demand) +

ƒn (performance)

Revenue =

ƒn (competition) +



ƒn (demand) +

ƒn (performance)


up to the access? Train the whole

personnel to

build IP

competence?

IP IP

IP

IP IP IP IP

IP IP IP

IP IP IP IP

IP

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Control Plane options

for access and aggregation networks

Data Plane Control Plane

Core Aggregation Aggregation

Interface to Common Control Plane

Today’s TDM Networks

Static

Centralized control

Simplified operational model

NMS

Today’s IP Networks

NMS

Dynamic

Distributed control

IP operational model

Centralized

control plane

NMS

Dynamic

Centralized Control

Converged Network

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traditional

ROUTER

traditional

TRANSPORT

NODE

Mgmt, CLI, SNMP

Forwarding, OAM handling

Routing (IGP, BGP)

Signaling/TE (RSVP, LDP, CSPF)

Control plane is baked into

underlying forwarding

infrastructure, that poses

scale, and feature velocity

problems

Mgmt, CLI

Forwarding, OAM handling

XC dB*

IGP (for top. discovery, DCN)

NMS, PCE

* For MPLS-TP,

can be

considered LFIB

TED

LIB FIB RIB LFIB

Svc cfg

NMS

Traditional networking:

functional representation

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Mgmt, CLI, SNMP

VN

S-N

E in

terf

ace

TED LIB RIB Svc cfg

NMS

Routing* (IGP, eGP), inter-region

Signaling, TE (RSVP, LDP, CSPF, PCEP)

TCN:

Traffic

Control

Node

PCE

Virtual Network System:

functional representation

Forwarding/OAM handling

LFIB

IP proxy/PBR functionality

IGP (for top. Disc, DCN),

intra-region

VNS-NE interface

Distributed

location

Forwarding/OAM handling

LFIB

IP proxy/PBR functionality

IGP (for top. Disc, DCN),

intra-region

VNS-NE interface

Distributed

location Virtual Network System

po

licin

g,

sh

ap

ing

etc

…

po

licin

g,

sh

ap

ing

etc

…

po

licin

g,

sh

ap

ing

etc

…

po

licin

g,

sh

ap

ing

etc

…

Central

location

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ACCESS AGGREGATION EDGE CORE

ENTERPRISE

MTU

RESIDENTIAL

CPE

CSR

Virtual Network System:

the network as a platform

Virtual Network System can logically represent as a single entity

a full cluster/region of nodes

PE

TCN

Virtual Network System IP

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CP consolidation in Aggregation

Data plane

Control plane

› The centralized control plane element can act as a single IP/MPLS node participating in the IP core, on behalf of the NEs in the access/aggregation

i/eGP Domain

› Homogenous DP: operational simplicity

› CP consolidation: topology hiding, manage scale

IP/MPLS Metro INDEPENDENT SCALING OF CONTROL PLANE AND DATA PLANE

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TCO analysis

SSR

2ND Aggregation

3RD Aggregation

…

1ST

Aggregation Access

GE

GE 10GE

TCN

TCN

SPO1410

SPO1410

~70% OPEX

savings

VNS

domain

Download the paper here

http://www.acgresearch.net/UserFiles/File/Business Case Analysis Docs/Ericsson White Paper_Virtual Network_ACG Research_2012.pdf

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Connectivity Scenarios details:

p2p L2 services ACCESS

1st Aggr. EDGE CORE METRO

2nd Aggr. METRO ACCESS

AN

AN AG2

AG1

AG2 AG1 VNS

PE ABR

LDP PW Eth AC Fixed/Mobile Backhaul

Business VPN, backhaul (e.g. X2)

PE PE PE CE

Business VPN

VNS

domain

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Connectivity Scenarios details

mp2mp L3 services ACCESS



AG2

AG1

AG2 AG1 VNS

PE ABR

AN

AN

PE CE PE

Business VPN, backhaul (e.g. X2)

Business VPN

CE

VNS

domain

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Connectivity Scenarios details:

mp2mp L3 services ACCESS



AN

AN AG2

AG1

AG2 AG1 VNS

PE ABR

PE PE

LDP, iBGP

PE

Eth AC

CE CE CE

VNS

domain

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Running demo in Ericsson booth

Configure & prove L3VPN by TCN command line printouts

SE100 SE100 laptop 2

SPO-1410

laptop 1

TCN

OSPF,

BGP,

LDP

SPO-1410 ML-SP 210

video

server

video

client

VNS domain

DPN 1

DPN 2

DPN 3

R1 R2

R3

10.50.1.2

10.50.3.2

10.50.3.1

vrf1

10.50.1.1

vrf1

10.33.99.3

10.33.99.1 10.33.99.2

GUI &

CMD Line

Static L3

VPN

configuration

Show

L3VPN

ML-SP 210

Auto-

Provisioned

DPN 3

Plug-in new

ML-SP 210

Adding a “customer site”, auto-configuration of VNS internal transport

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Testing the controller scalability:

study assumptions

› MBH

› IPTV

› p2p

2 SERVICES 3 Quantitative assumptions

› Static – number of

Tunnels

– number of Equipments

› Dynamic – Link down

› affected tunnels

› timescale

– IPTV channel change

› timescale

FIBER ACCESS

FIBER ACCESS

AGS1

AGS1

AGS1

AGS2

AGS2

AGS1

AGS1

AGS2

AGS2

AGS1

PE ABR

MSER PE IPTV

server

GGSN

PGW

PE ABR

Internet

FIBER ACCESS

FIBER ACCESS

FIBER ACCESS

VNS domain

1 CONNECTIVITY MODELS Several combination

of mesh, ring and

tree topologies with

up to 3 level of

aggregation

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Testing the controller scalability:

RESULTS

1 CONNECTIVITY MODELS

SERVICES 2

Quantitative assumptions 3

Which are the requirement on the VNS

controller in order to enable the

controlled network to have same or

better performance than a

traditional distributed network while

providing additional functionality

and reduced switch complexity?

› Static behavior

– Requirements are in the order of magnitude or below the capabilities of

existing controllers and switches

› Dynamic behavior (restoration)

– A centralized restoration scheme coupled to a data plane protection meet the

transport requirements of 50ms while ensuring best path availability

– Changing the connection structures has a significant impact on the scalability

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MOBILE

CORE

MULTI-SERVICE

EDGE

MOBILE

FIXED




Capacity =

ƒn (demand) +

ƒn (performance)


ƒn (demand) +

ƒn (performance)

Network costs =


MUST BREAK THIS!


ƒn (demand) +

ƒn (performance)

Revenue =

ƒn (competition) +



ƒn (demand) +

ƒn (performance)

Multilayer

optimization?

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Leveraging on multilayer technology

WDM WDM

WDM

OTN OTN

OTN

PKT

PKT

PKT

OTN

WDM

PKT

application

aware routing

variable

bandwidth

packet links

unified

recovery

There is an opportunity to improve the coordination between Packet

and Optical layers with a fully dynamic coordination

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minimum 32 pt

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minimum 24 pt

Bullets level 2-5

minimum 20 pt







MOBILE

CORE

MULTI-SERVICE

EDGE

MOBILE

FIXED




Capacity =

ƒn (demand) +

ƒn (performance)


ƒn (demand) +

ƒn (performance)

Network costs =


MUST BREAK THIS!


ƒn (demand) +

ƒn (performance)

Revenue =

ƒn (competition) +



ƒn (demand) +

ƒn (performance)

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minimum 24 pt

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minimum 20 pt







Premium OTT content delivery and

Inline Service Chaining

MSER GGSN

PGW

ED

GE

PCRF

CPE

CSR

PE ABR

VNS

VNS

domain

OTT Player makes use of network capabilities to

enhance its services for the users

Inline service

chaining,

traffic

steering

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Supporting growth and service variety

Conclusions

NEW PARADIGM: Virtual Network System

MAINSTREAM: IP implemented in every node

Simplified management

Growing complexity

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REMINDER:

VNS Demo & Whitepaper at Ericsson Booth

Virtual Network System: Splitting Control and Data Plane to Optimize IP and Transport Services at...

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