packet optical transport (pot) · 2/3/2009 · 5 © 2009 adva optical networking. all rights...
TRANSCRIPT
Packet Optical Transport (POT)
Fred Ellefson, 2/3/2009
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Trends and challenges Bandwidth growths and cost reduction
Annual Internet traffic growth rates: ~ 50-60% US, world
OPEX/CAPEX reduction Cost per bit transport (optical): ~ 20% reduction per year
Continuous scaling and cost reduction: 40G/100G, highly tolerant, ROADMs, … Reach extension (single, multi-span), eliminate need for offices, … Ease-of-use, …
Video enabled
Ban
dwid
th
(multiple web services, millions of users)
Example: Facebook 73 million active users 1+ million new users/week #1 photo site on Internet 20,000 application
Source: University of Michigan, end of 2007
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Network/Ethernet evolution
Best Effort Ethernet
Carrier Ethernet
Ethernet over any media
Ethernet as a service
Ubiquity, OAM & SLAs key challenges
EoSONET, EoTDM, EoDSL, etc
Any media over Ethernet
Fiber dominant in core, regional & campus
Transport requirements added to Ethernet
Frame relay, ATM, private line carried over Ethernet
Ethernet as Transport
Early adopters
Mass market
Total domination
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Ethernet & transport evolution
Ethernet evolves to replace SONET
Optical layer
SONET Layer
Ethernet Layer
IP Layer
Optical layer
Ethernet Layer
IP Layer
Transport requirement
Ethernet as service
Ethernet as Transport
Operations, admin. & maintenance (OAM)
IP Ping, echo, traceroute
full set including SLA monitoring (802.1ag, Y.1731, RFC-2544)
Protection switching LAG/STP 50msec (G.8031)
Synchronization No Synchronous Ethernet (G.8261/2/4)
Services supported IP/Ethernet IP/Ethernet + T1, T3, FR, ATM, etc (PWE3)
Access topologies Point to point 1+1, tree, ring (G.8031 & G.8032)
Traffic engineering Switched mesh Provisioned (PBB-TE, MPLS-TP)
Control Plane None GMPLS for Ethernet Label Switching (GELs)
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Packet Optical Transport (POT)
Packet Optical Transport is the combination of wavelength and EVC (VLAN) level switching Provides high order and low order switching similar to SONET
Optimizes fill within transport network
Enables separating users/applications in either the optical or EVC (VLAN) domain
Reduces O-E-O conversions to reduce capital and energy costs
+ = ROADM
WDM transport Layer 2 switch Packet Optical
Transport (POT)
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Layered traffic management
VT1.5
STS-1
Legacy TDM (SONET/SDH)
NGN transition
Low order
High order
EVC/VLAN
Wavelength
Packet Optical Transport (POT)
ROADM
L2 card
Highly efficient Carrier Ethernet transport
POT
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More granularity
Duct Cable Fiber Wavelength Pipe Subpipe
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Pipe vs. sub-pipe aggregation
(Full) pipe aggregation
10 * GE port into 10G uplink
Sub-pipe aggregation
20 * GE port (partly filled) into 10GE uplink
1 2 4 3 5 6
7 8 9 10
12
1 2 3 4 5 6 7
8 9 10 11 13 14
15 16 17 18 19 20
1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
“only” aggregation
to be used with filled pipes
aggregation + consolidation
to be used with just partially filled pipes
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EVC/VLAN switching
:
GbE links 10GbE links
L2 C
ard
1 2
20
1
2
1 GbE 10GbE
L2 C
ard
1 2
20
1
2
1 GbE 10GbE
:
L2 Card
10GbE 10GbE
1 1
2 2
EVC/VLAN cross-connection
Wavelength and VLAN switching simplifies nodal design
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Today
End users eg RESNET, researchers, labs, classrooms etc
Campus network
Aggregation layer eg Regional Optical Network (RON)
R&E backbone eg Internet2
GE pipes only
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POT solution
“VLAN/EVC Cross-Connect”
10GE pipes
End users eg RESNET, researchers, labs, classrooms etc
Campus network
Aggregation layer eg Regional Optical Network (RON)
R&E backbone eg Internet2
“VLAN/EVC Mux”
“VLAN/EVC Cross-Connect”
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End-to-end protected services
Reconfigurable optical core network CIR trails set up through network Protection managed by edge device Performance monitoring & OAM functions
provided by edge device
S-VLAN 1
S-VLAN 2 (protection)
CORE ITU-T G.8031 or LAG
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Business case (Why)
EVC/VLAN based networking / aggregation & transport is more efficient than full pipe / circuit based transport
Less overhead, less unused capacity even overbooking possible
Lower cost than SONET/SDH
More flexible than pipe or wavelength based connectivity
…
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Logical connection
OADM ring plus Ethernet switching
L2 switch
L2 switch
L2 switch
L2 switch
Eth Aggr. 2
Cost analysis components: 10 Gbit/s transponder
Cost analysis components: L2 switch
Cost analysis components: 10 Gbit/s IF module,
transceiver
DSLAM
Eth
Aggr. 1
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Logical connection
OADM ring with integrated L2 card (POT)
L2 card
1 ..... 20
Cost analysis components: L2 card
Cost analysis components: 10 Gbit/s XFP
FRN Eth Aggr. 2
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External L2 switch vs. L2 card
0,00% 10,00% 20,00% 30,00% 40,00% 50,00% 60,00% 70,00% 80,00% 90,00%
100,00%
external L2 switch integrated L2 card (POT)
Transponder Transceiver 10G IF module L2 switch
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CAPEX / OPEX analysis
WDM with integrated Ethernet aggregation saves Network elements (= number of boxes) Interfaces Power consumption Space consumption
… and reduces NMS effort OPEX
… and increases MTBF Network availability/reliability
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POT deployment drivers
Source: Infonetics, 2008
%
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POT market forecast
Source: Heavy Reading, Packet-Enabled Optical Networking Quarterly Market Tracker, June 2008
$M
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Summary
Marriage of optics and Ethernet (VLANs) is synergistic – provides layered management
POT offers savings in OPEX and CAPEX while increasing reliability
POT will be a key technology for future R&E network designs
Thank you
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