06 - IDNOG04 - Dion Leung (Coriant) - Emerging Trends & Real Deployments for Data Center Interconnection (DCI)

1. Dion Leung, Ph.D., VP Business Development
Emerging Trends & Real Deployments for
Data Center Interconnection (DCI)
Jakarta, July 27, 2017

2. Who is Coriant?
• Our Mission: Global optical transport networking leadership
• Our Customers: Trusted Tier 1 supplier serving over 500
customers globally, including 90% of the world’s top 50 service
providers and leading enterprises
• Our Company:
– Formed in 2013 and built upon the distinguished heritage and
proven solutions of industry-leading networking suppliers:
» Nokia Siemens Networks
» Tellabs
» Sycamore Networks
– Private company with deep financial resources and committed
ownership
– Over 70 sites in 40+ countries serving 100+ countries
– 35+ years of large deployment & service delivery experience
Connecting
Innovation and
Value
From the Edge
of Your Network
to the Core of
your Business
© 2017 Coriant. All rights reserved. 2

3. Facebook – presented at NGON 2016
3

4. Limelight Networks – presented at SWC 2015
4

5. Equinix – presented at NGON 2016
5

6. Trends for Data Center Interconnection (DCI)?
6
M
U
X
Individually
Colored
Wavelengths
D
E
M
U
X
Fiber Pair (or Single Core)
Individually
Colored
Wavelengths
Equally spaced channels (aka standard ITU grid)#Open transponders over
any DWDM line systems
#Flexible optical layer
connecting metro, regional,
subsea DCs
Optical layer functions
become #pluggable
© 2017 Coriant. All rights reserved. Company Confidential.

7. Data Center Interconnection & Applications
7
• Between racks or meet-me-room
on the same floor
• Between racks on different floor
• Between two or more data centers

8. 8
Interconnections “Within” a DC
• Between racks on the same floor and/or
different floors
– X-connection has been one of the main
revenue streams for colocation providers
– For telco and content providers,
x-connections monthly cost can be a large
part of the OPEX, especially in carrier-
dense, expensive DCs in NY, HK, Tokyo
– Low cost DWDM point-to-point solutions are
deployed to reduce monthly recurring cost
– There is also growing interest by hyperscale
DC to deploy point-to-point DWDM
connecting spine and leaf switches

9. Interconnections Between DCs - Metro & Regional
9
• Between two or more DCs
– DC-to-DC connectivity across metro, regional,
long-haul/submarine regions, e.g. within metro
Jakarta, or between Jakarta to Surabaya, or
between Singapore to Tokyo
– Colocation service providers need high-
speed connectivity to make their tenants feel
like all servers, switches, routers are “virtually”
located in the same DC
– Dark fiber providers who wants to expand
their business from sell “dark” fibers to
wavelength services
– Content providers who are looking to build
their own content delivery network (from leasing
bandwidth to build-their-own network)

10. Cable Landing Station (CLS) to DC and
DC-to-DC over Submarine Links
10
• Bandwidth Requirements Continue to
Drive Subsea and CLS-to-DC Links
– The new data centers in the region,
especially in HK/SG/JP, have continued to
demand faster connections from the
submarine cables
– Capacity of backhaul links between CLS
and local DC has to be upgraded
accordingly
– It is not uncommon for these links to carry
Tbps of capacity

11. What is an Open Line System (OLS) Concept?
11
• Open Line System (OLS) Model
– Open network decouples “optical layer” from “wavelength service layer”
– Open software interfaces make network management simpler
– These open transponders must be simple to manage without forcing to use
a traditional NMS system
DWDM
ROADM
Open DWDM line system from Vendor A
(metro, regional, LH, subsea)
Vendor C
Vendor B
Open
Transponder
DCI Pizza Box
NMS, CLI, NetConf, API
Vendor C
Vendor B
Open
Transponder
DCI Pizza Box
DWDM
ROADM
DWDM
ROADM

12. 12© 2017 Coriant. All rights reserved. Source: IHS/Infonetics: 100G+ and ROADM Strategies, Global Service Provider Survey (Nov. 2015)
DCI Applications Constraints Open Line System Drivers
Cost/port and power density lead but …
… ease of integration and DC
automation is key, and…
… requirement for Best-in-
Class functions emerging
Infonetics: What are the Drivers for OLS?

13. Customer’s Requests for the Past 12 Months…
• Conducted trials with 3rd party optical line systems
• A change, a new movement, a new way of growing
their transport networks
13

14. Customer Proof of Open Line Systems Concept
14

15. 200G/16QAM Transmission (490km) Trial
Tier 2 Service Provider: Link details for London – Leeds
• 200G/16QAM wavelengths Open Line
Transponder from Coriant and Cisco
over Nokia Transmission
15© 2017 Coriant. All rights reserved. Company Confidential.
Leeds
1830 OLT
1 degree
Site 2
1830 ROADM
2 degree
Site 3
1830 ROADM
2 degree
Site 4
1830 ROADM
2 degree
Site 5
1830 ROADM
2 degree
Site 6
1830 OLA
RAMAM
London
1830 OLT
1 degree
114 km
32 db
70 km
20 db
73 km
21 db
75 km
23 db
98km
30 db
67km
20 db
16QAM @ 191.75THz 16QAM @ 191.75THz

16. Proof point with Tier 1 US Carrier – 1500km
“Just wanted to let you know that
our soak test of the Groove
between DFW and DEN has
completed and was successful at
8QAM running 150G. We ran for
two days with no errors. The plan
is to put some production traffic on
this unit.”
Global Network Services
16© 2017 Coriant. All rights reserved. Company Confidential.

17. Trends for Data Center Interconnection (DCI)?
17
M
U
X
Individually
Colored
Wavelengths
D
E
M
U
X
Fiber Pair (or Single Core)
Individually
Colored
Wavelengths
Equally spaced channels (aka standard ITU grid)#Open transponders over
any DWDM line systems
Optical layer functions
become #pluggable
© 2017 Coriant. All rights reserved. Company Confidential.

18. Miniaturization: EDFA Technology Example
MSA / Module Based  XFP / Pluggable Based
18
EDFA: MSA (90x70mm2) EDFA: Ultra-Mini
(60x40mm2)
EDFA: XFP & OFP2
© 2017 Coriant. All rights reserved. Company Confidential.
XFP-EDFA

19. Other Possible “Pluggable” Functions…
 Miniaturization of Optical Layer Components
− EDFAs
− EVOAs
− OCM
− WSS
− OSC
 Compact Low Loss Filters
− Low insertion loss-Enables extended passive architectures
and more complex channel plans
− Reduced footprint
 EVOAs with Auto Attenuation
− EVOA with integrated photodiode
 Power Tone for Amplifier Gain Setting:
− Cost-effective solution for automatic gain setting on amplifiers
EDFA: MSA (90x70mm2) EDFA: Ultra-Mini (60x40mm2) EDFA: XFP & OFP2

20. Pluggable Optical Layer: Trends and Evolution
20
Low Upfront Cost
Functionality
Passive Fixed Gain
Amplifier
Variable Gain
Amplifier
Manual Gain
Setting
OCM
Per Ch Power Monitoring,
Auto balancing and gain
setting
CWDM Filters EVOAs
for extended
reach
Broadcast &
Select ROADM
Raman Amplifier
DWDM Filters Route & Select
ROADM
Power Tone
Amplifier gain setting
OSC
In-band Management &
Amplifier Gain Setting
OTDR
Allow users to optimize, mix-and-match functionalities
for a variety of DCI applications… hopefully with better costing
Pre-Amp+
Booster

21. Trends for #DCI?
21
M
U
X
Individually
Colored
Wavelengths
D
E
M
U
X
Fiber Pair (or Single Core)
Individually
Colored
Wavelengths
Equally spaced channels (aka standard ITU grid)#Open transponders over
any DWDM line systems
#Flexible optical layer
connecting metro, regional,
subsea DCs
Optical layer functions
become #pluggable
© 2017 Coriant. All rights reserved. Company Confidential.

22. ROADM – Basic Concept and Value
• For initial Point-to-Point network, Fixed OADM (FOADM) network
architecture worked fine.
• A problem arises when we have intermediate location that requires
“partial” adding/dropping of traffic  manual patch work is needed
DC1 DC3
40km
12dB
DC2
20km
8dB
5 months ago: 10 x 10GE connectivity between DC1 and DC3
10 x 10GE
5 x 100GbE
Next month: 5 x 100GE connectivity between DC1 and DC3 (via DC2)
© 2017 Coriant. All rights reserved. Company Confidential.

23. What Do You Need to Do at DC2?
• Some cable patching work is required to get the 100G wavelengths passing via DC2
• For small l counts, the job is manageable. But for full 40/80/96 DWDM channels,
ROADM architecture will allow user-selective add/drop capability.
DEMUX
MUX
l
l
l
l
l
l
l
l
l
l
1. Engineers puts in a physical patch
cord, which introduces insertion loss
and it affects the overall link budget.
2. Each wavelength added
needs to be re-balanced…
l 3. Regeneration is often
needed due to deficit power budget
DC1
DC2
DC3
© 2017 Coriant. All rights reserved. Company Confidential.

24. How a 4-Degree ROADM Node Works…
A/D
Ex2
Ex4
Ex3
R
O
A
D
M
Fiber
Line
A/D
Ex3
Ex2
Ex4
R
O
A
D
M
Fiber
Line
A/D
Ex2
Ex4
Ex3
R
O
A
D
M
Fiber
Line
l
Mux / Demux
l
l A/D
R
O
A
D
M
Fiber
Line
Ex2
Ex3
Ex4
Mux / Demux
l
lExpress Cable
Automatic
Power
Equalized
Wavelengths
Adding new ROADM
“degrees” when new
connectivity is needed
DC1 DC3
DC2
DC4 DC5

25. Various Kinds of ROADM Implementation Today…
25
What types of ROADM line system is right for you?
It depends on your application and design objectives.
© 2017 Coriant. All rights reserved. Company Confidential.
Individual
Modules
ROADM-on-a-
Blade
Pluggable
Optical Layer
Footprint & Power   
Flexibility (to mix & match
components)
  
ROADM Scalability
(Degrees, Channels)
  
Advanced ROADM
Add/Drop (CDC, Flexigrid)
  
Performance/Reach   
Ease of Installation   
Cost of Replacing Failed
Hardware/Sparing
  

26. A Good Optical Planning Tool “Always” Helps… 
26© 2017 Coriant. All rights reserved. Company Confidential.
Especially if you fiber optic
layer begins to grow…
… or if latest technologies,
including colorless,
directionless, contentionless,
gridless, are considered.

27. Thank You.
You can find me on Linkedin
https://www.linkedin.com/in/dionleung/