Dis-integration of the DCI Box - ECOC · PDF fileotn/ flexo 40ge 50ge 50ge qsfp28 25ge 25ge...
Transcript of Dis-integration of the DCI Box - ECOC · PDF fileotn/ flexo 40ge 50ge 50ge qsfp28 25ge 25ge...
Dis-integration of the Data Center Interconnect (DCI) Box
Page 2
Brief Look at Todays Technology
Looking at Ongoing Work & Futures
Discussion on direction for DCI boxes
Conclusion
Page 3
Brief Look at Today’s Technology
Chassis & Pizza Box offerings from multiple vendors for different markets
– Market is looking for Rack & Stack model with 3 to 5 year life span as technology is moving fast
Page 4
Simple High Level DCI Design
Line Optics(Coloured / GRAY)
CO
HER
ENT
DSP
PA
M4
Dir
ect
Det
ect
(ASS
P/A
SIC
)
FRA
MER
DEV
ICE
(FP
GA
/ASS
P/N
ON
E)
QSFP28
QSFP28
QSFP28
QSFP28
QSFP28
100GE/FlexE
OTN/FlexO
40GE
50GE
50GE
QSFP28
25GE
25GE
25GE
25GE
10GE
10GE
10GE
10GE
Client Optics (Gray)FR
AM
ER D
EVIC
E(F
PG
A/A
SSP
/NO
NE)
CO
HER
ENT
DSP
TO
DA
Y 2
00
per
λ
(ASS
P/A
SIC
)
Line Optics(Coloured / GRAY)
IQ Interface
ACOAnalog Coherent
Optics
DCODigital Coherent
Optics
BACKPLANEMIDPLANEClient Card Line Card
Transponder / Muxponder CardPizza Box (DCI)
Flexible Line SystemModulations / Baud Rate etc. Allows for different rates on the fiber
100GE / OTU4
Framer Device Functions
– Variable Rate SERDES (10G through 25G)
– Protocol Evolution (FlexE, 100GE FEC)
– Aggregation (10GE/25GE/40GE)
– Automation & Discovery (LLDP)
– Security Functions
– Adaptation to supported DSP clients
DSP Device Functions
– Fixed Rate SERDES (10G or 25G)
– Fixed support for protocols (100GE/OTU4)
• Varies by manufacturer
– DSP Functions (PMQAM16 = 200G per λ)
Page 5
Deeper Look into Today’s DCI Box
DSP FunctionsFramer Functions
Line Optics(Coloured /
GRAY)
CO
HER
ENT
DSP
PA
M4
Dir
ect
Det
ect
(ASS
P/A
SIC
)
FRA
MER
DEV
ICE
(FP
GA
/ASS
P/N
ON
E)
QSFP28
QSFP28
QSFP28
QSFP28
FRA
MER
DEV
ICE
(FP
GA
/ASS
P/N
ON
E)
Cu
rren
t D
SP2
00
G p
er λ
Line Optics(Coloured /
GRAY)
Low
er
Rat
e P
ort
A
ggre
gato
inN
ew
er
Pro
toco
lsC
lien
t FE
C
Term
inat
ion
Au
to A
dap
tive
SER
DES
SDN
Au
tom
atio
n F
un
ctio
ns
(Dis
cove
ry e
tc.)
Secu
rity
Fu
nct
ion
s
Ad
apta
tio
n t
o D
SP In
terf
ace
s
Au
to A
dap
tive
SER
DES
Fixe
d R
ate
SER
DES
10
0G
EC
AU
I (x)
OTU
4O
TL4
.x
Clie
nt
Mo
nit
ori
ng
Clie
nt
Mo
nit
ori
ng
Co
he
ren
t D
SP F
un
ctio
ns
OTN
Tra
nsp
on
de
r
Multiple Platforms use ASSP or FPGA based Framer devices to support desired functions
Current Pluggable Line Optics
Page 6
Pluggable Line Optics Current Roadmap
Sources:
Picture: CPF MSA (http://www.cfp-msa.org/index.html)
1: Widely Available based on Google Search Results for Coherent CFP
2: CFP2 ACO IA (http://www.oiforum.com/wp-content/uploads/OIF-CFP2-ACO-01.0.pdf)
Coherent CFP
Module 1
(CFP DCO) CFP2 ACO 2
Page 7
Looking at Ongoing Work & Futures
Coherent Systems:
– Table above makes it evident that in the future 400G to 600G per λ solutions may be available
– Further in the future even higher baud rates or modulations can be envisioned
PAM 4 Direct Detect Systems
– 56G PAM4 based DD systems have been publically announced
– Higher baud rate PAM4 systems can be expected (reusing IEEE 400G Base DR4 technology)
Page 8
Future of Line Side Technology
Current Technology Future Low Estimate Future High Estimate
Data Symbol Rates* 25Gbaud 37.5Gbaud 50Gbaud
Modulation Scheme PM-QAM16 PM-QAM32 PM-QAM64
Data Line Rate per λ 200Gbps 375Gbps 600Gbps
*: Data Symbol Rate is for carrying Ethernet Type Data, does not include any overhead, FEC or framing functions
Pluggable Line Optics moving toward integration
– CFP2 ACO (product) CFP2 DCO (ongoing work)
– CFP8 ACO (ongoing work) CFP8 DCO (possible future)
ACO filling the gap between MSA and DCO – till we can get integrationPage 9
Future of Pluggable Line Optics
Sources:
Picture: CPF MSA (http://www.cfp-msa.org/index.html)
1: OIF Current Projects (http://www.oiforum.com/technical-work/current-oif-work/)
2: Possible Future Direction
CFP2 DCO 1
CFP8 ACO 1
CFP8 DCO 2
Page 10
Direction of DCI Boxes
Functions being integrated into DSP – Desire to have multisource Optics
Page 11
Current Directional Thrust based on ACO Optics
Line Optics(Coloured / GRAY)
CO
HER
ENT
DSP
PA
M4
Dir
ect
Det
ect
(ASS
P/A
SIC
)
FRA
MER
DEV
ICE
(FP
GA
/ASS
P/N
ON
E)
QSFP28
QSFP28
QSFP28
QSFP28
QSFP28
100GE/FlexE
OTN/FlexO
40GE
50GE
50GE
QSFP28
25GE
25GE
25GE
25GE
10GE
10GE
10GE
10GE
Co
mp
lex
FRA
MER
Fu
nct
ion
s(F
PG
A/A
SSP
/NO
NE)
CO
HER
ENT
DSP
(6
00
G)
PA
M4
DD
(2
00
G –
40
0G
)(A
SSP
/ASI
C)
Line Optics(Coloured / GRAY)
IQ Interface
ACOAnalog Coherent
Optics
FlexE / OTLCn.m100GE /
OTU4
Integration
Sim
ple
FR
AM
ER
Fun
ctio
ns
(In
tegr
atio
n in
to D
SP)
Desire Pluggable
Optics to have
multiple vendors
& options
DSP is on the
board and not
changeable
DSPs will have different levels of Protocol Features
Power and Cost tradeoff’s need to be considered for different technology
Many Permutations of DSPs possible but maybe the right mix is not therePage 12
Evolution of DSP chips100GE Mapping
Lower Rate Aggregation
Single FlexE Group (Aware)
Multiple FlexE Groups (Aware)
FlexE Termination (Full)
Encryption (MACSec/Bulk)
100GE FEC
100GE + LLDP Snooping
Line FlexE Mapping
400GE Mapping (OTN)
400GE Mapping (FlexE)
200GE + others
MLG Markers
OTN OAM & Management
OTN Mappings (IMP, FlexE, BMP, GMP)
NG
CO
HER
ENT
DSP
#1
100GE Mapping
Lower Rate Aggregation
Single FlexE Group (Aware)
Multiple FlexE Groups (Aware)
FlexE Termination (Full)
Encryption (MACSec/Bulk)
100GE FEC
100GE + LLDP Snooping
Line FlexE Mapping
400GE Mapping (OTN)
400GE Mapping (FlexE)
200GE + others
MLG Markers
OTN OAM & Management
OTN Mappings (IMP, FlexE, BMP, GMP)
NG
CO
HER
ENT
DSP
#2
100GE Mapping
Lower Rate Aggregation
Single FlexE Group (Aware)
Multiple FlexE Groups (Aware)
FlexE Termination (Full)
Encryption (MACSec/Bulk)
100GE FEC
100GE + LLDP Snooping
Line FlexE Mapping
400GE Mapping (OTN)
400GE Mapping (FlexE)
200GE + others
MLG Markers
OTN OAM & Management
OTN Mappings (IMP, FlexE, BMP, GMP)
NG
PA
M4
Dir
ect
De
tect
RET
IMER
COHERENT DSP A
LONG Reach
COHERENT DSP B
METRO Reach
PAM RetimerSHORT Reach
POWER = ++++
Cost = $$$$
POWER = ++
Cost = $$
POWER = +
Cost = $
Different flavours of DSP to address different market spaces
Due to use of SDN controller want the DCI box to feel the same
– Different DSPs but identical SW view mean the framer needs to make system DSP agnostic
Page 13
Evolving DSPs and System SW
DSP Agnostic box thrusts features towards Framer DCI Dis-integration
Line Optics(Coloured / GRAY)
CO
HER
ENT
DSP
PA
M4
Dir
ect
Det
ect
(ASS
P/A
SIC
)
FRA
MER
DEV
ICE
(FP
GA
/ASS
P/N
ON
E)
QSFP28
QSFP28
QSFP28
QSFP28
QSFP28
Co
mp
lex
FRA
MER
Fu
nct
ion
s(F
PG
A/A
SSP
/NO
NE)
CO
HER
ENT
DSP
(6
00
G)
PA
M4
DD
(2
00
G –
40
0G
)(A
SSP
/ASI
C)
Line Optics(Coloured / GRAY)
ACOAnalog Coherent
Optics
Sim
ple
FR
AM
ER
Fun
ctio
ns
(In
tegr
atio
n in
to D
SP)
Desire to have DSP
changed per application
DSP AGNOSTIC Design
Identical System
& SW ImageDis-IntegrationId
en
tica
l S
W &
Syste
m Im
ag
e
ca
n th
rust th
e D
is-I
nte
gra
tio
n
of th
e D
CI B
OX
Framer ABSTRACTS DSP – System looks Identical to SW for all DSPs
Interfacing between the DSP & Framer is still complex
– Simplify this interface Allows to make simpler DCO optics
Page 14
The Dis-Integrated DCI Box
Line Optics(Coloured / GRAY)
CO
HER
ENT
DSP
PA
M4
Dir
ect
Det
ect
(ASS
P/A
SIC
)
FRA
MER
DEV
ICE
(FP
GA
/ASS
P/N
ON
E)
QSFP28
QSFP28
QSFP28
QSFP28
QSFP28
FRA
MER
Fu
nct
ion
sA
BST
RA
CTI
ON
OF
DSP
(FP
GA
/ASS
P/N
ON
E)
CO
HER
ENT
DSP
(6
00
G)
PA
M4
DD
(2
00
G –
40
0G
)(A
SSP
/ASI
C)
Line Optics(Coloured / GRAY)
IQ Interface
Dis-Integration
FlexE / OTLCn.m100GE /
OTU4X
Sim
plif
y
Inte
rface
DCO
With DCO a box can be used with any
flavor optics – ultimate user choicePage 15
Utopia – Ubiquitous Optics for all applications
400G CFP8
Metro DCO
400G CFP8
PAM4 DD
200G CFP8
ULR DCO
400GE CFP8
IEEE
NEAR FUTURE
2 x 600G CFP8
Metro DCO
2 x 400G CFP8
PAM4 DD
400G CFP8
ULR DCO
2 x 400GE
CFP8 IEEE
Further Out
DCO enable various products for same transport gear
Transport Evolves from Chassis to Box to Pluggables
– For some applicationsPage 16
Utopia – Function Agnostic Transport
Line Optics(Coloured / GRAY)
CO
HER
ENT
DSP
PA
M4
Dir
ect
Det
ect
(ASS
P/A
SIC
)
QSFP28
QSFP28
QSFP28
QSFP28
QSFP28Tr
ansp
ort
Fu
nct
ion
s(F
PG
A/A
SSP
)
CO
HER
ENT
DSP
(6
00
G)
PA
M4
DD
(2
00
G –
40
0G
)(A
SSP
/ASI
C)
Line Optics(Coloured / GRAY)
IQ Interface
DCO OR PAM4 OR IEEE
Swit
ch
Fun
ctio
ns
(FP
GA
/ASS
P)
NP
U
Fun
ctio
ns
(FP
GA
/ASS
P)
Tran
spo
rt B
ox
Swit
ch B
ox
Ro
ute
r
My Functions
Page 17
Conclusion
Evolution of the DSP in the future can create a mix features on the DSP
DSP/Technology to address different target applications
– Different Power, Cost and Reach Tradeoffs in designs
Want the look and feel of the box to be identical for applications
– SDN Controller thinks its talking to the same box with a “different reach” parameter
Simple Framer can abstract away the DSP functions
– Customizable framer device that can provide different features to address different applications
• Ability to tradeoff for power and cost; provide flexibility to add/remove features as product evolves
• FPGAs play well in this area
Further in the Future framer logic can be absorbed in multiple products
– Allows for ubiquitous distance optimized optics for various products
Page 18
Why Dis-integrate the DCI Box
High Level Integration to allow for line optics to fit in pluggable optics
DSP optimization for power to fit in DCO form factors
– May require application specific DSPs (Optimization for Power and Cost)
Clear Industry Direction to want to move towards ubiquitous optics
Simplification of the Interface to the DCO is key to make this reality
– This is something the industry should start looking at soon
• Today we have many protocols for Flexible Transport and we are working on more
• Need a simple definition of interface that is based on bits – Optics should not be burdened by protocols
– Needs multi-vendor decision in a open forum
• Decide on what granularity this simple interface will be (25G/50G/100G …)
– Like FlexE if there is enough traction we can get a quick resolution to this interface
Page 19
What is Needed to Reach Utopia ?
Page 20
Thank You!
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Page 21