1. Network connectivity - trends inside data centres jörgen Strandberg, rcdd advanced technology support services – emea

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3. Hyperscale, colo and edge – where and what?
LIGHT POLES
STREET FURNITURE
CENTRAL OFFICE
CELL TOWERS
IDF CLOSET
VEHICLES
MODIFIED CABINET
hyperscale
CONTAINER DC
MTDC / COLO
Many trends that could be discussed and is widely covered on the web;
Security – Data Integrity
GDPR, PCI/DSS, SSAE 16, HIPAA, EN Compliance
Where do we draw the line between IoT EDGE + OT and the IT and Physical Security
Energy efficiency, re-use of energy
Metrics in place, possible to have standardsbased discussions on metrics.
PUE – Power Usage Effectiveness - EN
REF – Renewable Energy Factor – EN
ERF – Energy Reuse Factor – prEN
CER – Cooling Efficiency Ratio – prE
Availability
Tier Levels vs Availability Classes – COLO (Uptime Tier or better Availability Class) vs HyperScale (Own best practices) and multi-site deployments
EDGE availability requirements?
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4. Global Data Center Traffic by Destination
Data center-to-data center
Replication, interdatabase links
Data center-to-user
Web, , internal video on demand, WebEx, et al.
Within data center
Storage, production and development data, authentication
2021 Projected figures – Cisco Global Cloud Index
Most data traffic happen inside the DC
A request from a user may involved a large portion of services insde the DC – low latency is required
Large volumes of data needs higher speeds.
Simpler requests of data may not need the high speed but low latency instead – helps with going to higher speeds interfaces
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5. Network Topologies inside the dc
Due to the large amount of traffic inside the DC, virtualization, distributed storage all require low latency. A flatter network helps.
Other topologies may also appear but likely a mix of everything depending of type of DC.
So how does the switching gear and applications keep up with these requirements?
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ICT TODAY – MAY/JUNE EDITION 2019

6. Application speeds supporting the cloud
BCM56980 SERIES 12.8 Tbps StrataXGS® Tomahawk® 3
Switch ASIC
256x50G
Ethernet Alliance - global, non-profit, industry consortium of member organizations that are dedicated to the continued success and advancement of Ethernet technologies.
Broadcom is one of the players of chipsets for Switches.
The BCM56980 is a Single-chip solution for data center Top-of-Rack, Aggregation and Spine Switches and support:
32x400GbE, 64x200GbE or 128x100Gb
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7. What’s done at the transciever side
4 main areas that can
Increase the baud rate, signaling speed
Increase the modulation – instead of 1-0 levels, go to 4 levels
Use WDM technologies or..
.. increase the number of fibers being used in the channel
Results in various flavours of Ethernet. More options now than before.
IEEE or Incits T11 (FC) specify optical transcivers. They specify minimum performance levels that will ensure interopability
Various MSA’s exists which are agreements between multiple manufacturers to make optical transcievers that can plug into switches.
Some MSA’s are SFF Committee, CFP-MSA and the CDFP-MSA.
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Courtesy of Corning, CommScope

8. Planning the connectivity
Topology
Availability class
Density
10/25/40/50/100/200/400G – where do we start?
Not just a SM or MM question
Distance
Loss
2-f, 4-f, 8-f, 16-f, 20-f, 32-f variants
Port breakouts
Establish the topology, work out the distribution areas
Availability class will defined the various potential redudant pathwways. Make sure to calculate the longest route for worst case
Given the need (or no need) for redundancy, review any particulare areas from a density point of view
What distances to we have to go
How many connections are required in a channel
What would be the most media given these requirements
Will port breakouts be considered in the network infrastructure
( - WDM technologies will generally not be supported inside the DC and port break-outs.)
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9. Proprietary and Confidential. © 2018 Anixter Inc.
Port breakouts
- Over half of 40GbE QSFP ports shipped are being used to break-out to 4x10G
- Why operate a port in a “break-out” configuration?
2-3x the density per blade
50% less power per port
30% cost savings per port
Switch migration path (do not repurchase optics or cards)
QSFP+ (40G), QSFP28 (100G) and QSFP56 (200G)
400G is coming with 2 form factors for the Access/Intra-DC: QSFP56-DD (also called QSFP-DD for QSFP Double Density) OSFP (for Octal SFP)
The 200G will be available on QSFP56 and QSDP28-DD, while 400G will be available on QSFP56-DD, OSFP and CFP8.
The 400G QSFP56-DD, also called QSFP-DD is presumed to be the key adopted form factor for the access and intra-DC while CFP8 will be used for DCI (DataCentre Interconnect)
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Information from published data on websites.

10. port breakouts across dc - 4 ports of 400G-DR4 to 16x100g-dr
SM MPO8 Patch cords on left side – Method B
Trunk cable is Method A
Standard LC duplex patch cords on right
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Source: Corning guide for Arista Networking

11. port breakouts across dc - 2 ports of 400G-SR8 to 16 x 50G-SR
16f angeled MPO patch cord to 2x8 MPO on left side – OM4 – Type B
Standard patch cords otherwise
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Source: Corning guide for Arista Networking

12. Proprietary and Confidential. © 2019 Anixter Inc.
summary
”Hyperscale-speeds” are spreading
Port breakouts provide better economics, driving change
Several media options
Plan for migration, take active decisions
MPO8, MPO12, MPO16, MPO24 is likely to appear in your infrastructure
Polarity Methods
Ensure partners have test equipment
Administration/documentation plan in place
Make sure pathways support change and meet availability requirements
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13. Thank you