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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
Copyright © 2008 Juniper Networks, Inc. www.juniper.net 3
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
Copyright © 2008 Juniper Networks, Inc. www.juniper.net 4
The New Restoration Capabilities
OSS
GMPLS
GMPLS
Copyright © 2008 Juniper Networks, Inc. www.juniper.net 5
The New Capacity Management
OSS
GMPLS
GMPLS
San Francisco
NYC London
Atlanta
Hong Kong
Roma
Copyright © 2008 Juniper Networks, Inc. www.juniper.net 6
The New Capacity Management
OSS
GMPLS
GMPLS
San Francisco
NYC London
Atlanta
Hong Kong
Roma
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Path Control A crisis in architecuture?
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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
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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
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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
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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
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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
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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)
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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 stringer@juniper.net