Copyright © 2008 Juniper Networks, Inc. Proprietary and ...MPLS Data Plane (P2P, P2MP, MP2P, MP2MP)...

Copyright © 2008 Juniper Networks, Inc. Proprietary and Confidential www.juniper.net 1

Copyright © 2008 Juniper Networks, Inc. www.juniper.net 2

Network Directions

  Two different but associated topics: 1.  The dynamics of what we call circuits or facilities today

2.  How we control SERVICE paths


Router/Switch Network or Optical Network (ASON)?

 Wrong Question – Wrong arguments

 The right answer is an ASON network where routers (service platform) and optical (transport) work together to create a network at an efficiency level never before accomplished.

 The right question is how do I use each device as EFFECTIVELY as possible


The New Restoration Capabilities

OSS

GMPLS

GMPLS


The New Capacity Management

OSS

GMPLS

GMPLS

San Francisco

NYC London

Atlanta

Hong Kong

Roma


The New Capacity Management

OSS

GMPLS

GMPLS

San Francisco

NYC London

Atlanta

Hong Kong

Roma


Path Control A crisis in architecuture?


1.  TDM is past its prime   Built primarily for voice, and adapted reasonably successfully for leased

lines, fine-grained TDM (PDH/SDH) is increasingly irrelevant for Next Generation Networks

  TDM is also very expensive on a cost/Gbps basis 2.  Packet transport is on the rise

  There is recognition that transport must focus on packets, not bits   There are multiple approaches, and a lot of confusion out there

3.  Interest in the Packets+Photons Phenomenon is growing   There is also recognition that the worlds of packets and of optical transport

must come together   Again, there are several approaches, and no clear way forward

What Should Be Done?

Three Trends in Networking


Suggestion: Transition to Ethernet

SONET/SDH Deep Channelization: down to DS0

Framing: carry bits/cells/frames/packets Overhead: OAM: liveness, management Fast Restoration (ring-oriented) Traffic Engineering (path and capacity mgmt) Timing (clock/frequency synchronization)

Ethernet

Framing: to carry packets G.709: optical OAM, FEC, coarse chan, framing

Timing (synchronous Ethernet, timing as service)

WDM Fiber

Magic layer (PBT/TMPLS/MPLS) to recapture TE, FRR, packet OAM, etc.

Migrate from SONET/SDH to Ethernet + “magic layer”

Removing functions that are no longer required leads to savings


Is the Traditional Organization Still Valid?

 The “elephant in the room” is the that separation between the “IP/MPLS-services” part of the network from the “transport” part. We use a purple line to show that boundary.

 This has become entrenched in network architectures over the past 20 years, and manifests itself: •  In organizational structures, both in service providers and equipment

vendors •  In philosophies of deployment and implementation •  In regulations and laws set by governments •  In unions and internal politics of various flavors •  And in so many other hidden or unnoticed ways


The Right Picture?

services

transport

Also, placing the line here captures only a few

services

This would negate the power of MPLS: the tight synergy of MPLS + IP

DWDM Fiber

Leas

ed L

ines

, Fra

me

Rel

ay a

nd A

TM P

Ws

VoIP

Internet (search, e-commerce, advertising, video, IM, “over-the-

top” …)

Internet Protocol MPLS (P2P, P2MP, MP2P, MP2MP)

Ethe

rnet

PW

s (V

PLS

& V

PWS)

VoIP

Pee

ring

IP V

PNs

IPTV

/VoD

TV D

istr

ibut

ion

(sep

arat

e n/

w)

DTV

Dis

trib

utio

n (L

ayer

2 o

ver M

PLS)

IMS all these services delivered to an IP-enabled mobile

handset

?

POTS

, LL

& V

Cs


What is “IP/MPLS”, really?

 This previous slide brings into focus the architectural confusion in the term “IP/MPLS”

 There are really four separate components: •  An infrastructure control plane (ISIS/OSPF, RSVP-TE,

LDP, …) that is common across IP and MPLS •  An IP services, policy and control plane (BGP, SIP, AAA,

Radius, …) that underpins IP-based services •  An IP data plane that delivers these services •  An MPLS data plane that converges the IP and other

data planes, with improved traffic control and resilience


This maintains the synergy between MPLS and IP and has the right partition between infrastructure/services

The Right Picture

MPLS Data Plane (P2P, P2MP, MP2P, MP2MP)

Ethernet + G.709

DWDM Fiber

POTS

, LL,

VC

s

Leas

ed L

ines

, FR

and

AT

M P

Ws

VoIP

Internet (search, e-commerce, advertising, video, IM, “over-the-

top” …)

Infrastructure Control Plane

Ethe

rnet

PW

s (V

PLS/

VPW

S)

VoIP

Pee

ring

IP V

PNs

IPTV

/VoD

DTV

Dis

trib

utio

n (L

ayer

2 o

MPL

S) IMS

all these services delivered to an

IP-enabled mobile

handset

services

transport SDH

IP Data Plane

IP Services Plane

TV D

istr

ibut

ion

(sep

arat

e n/

w)


Have No Illusions…

“If you’re not afraid, you don’t understand!” This has been said in the context of networks many times, by many people, and it is as true today as ever before

 We (as a total community) have to confront the purple line •  If not, one cannot build efficient, cost-effective networks •  Without this, “Next Generation Networks” are just incremental

changes, not real progress towards a packet-centric paradigm •  All the talk of saving CapEx and OpEx will also be incremental,

rather than fundamental changes towards an ultra-high-bandwidth future

 At the same time, know that this will not be easy •  20 years is a long time for habits and attitudes to accrete

Copyright © 2008 Juniper Networks, Inc. Proprietary and Confidential www.juniper.net 15

Thank you [email protected]

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