Design of the Physical Layerdcforum.ru/sites/default/files/12.30-12.50_siemon... ·...

Design of the Physical Layer

Critical Choices for Today's Data Centres

The Siemon Company:The partner of choice for your Global Data Centers

Alberto Zucchinali RCDD

Senior Technical Manager

EMEA DC Solutions & Services Manager

alberto_zucchinali@siemon.co.uk

5 main topics

• Impact of high speed copper on DC design

• Next generation optical cabling (40/100G)

• Pre-terminated solutions

• Density vs. Management ?

• Space design and DC architecture

Why 10G & more ?

• Server performance boost

• More applications on a single server

• Virtualization (up to 15 virtual server on one)

• 2, 3, 4 Gigabit connection per server

• Unified networking (iSCSI, NAS, FCoE....)

• 10GBASE-T costs less (about -60%) and consumes much less power than 1000BASE-T on a per-Gbps per-port basis

At Least Six Different Server Access Speeds Forecast to Coexist over the Next Five Years

Source: Dell’Oro Group Controller and Adapter 5-Year Forecast Report

25GBASE-T

• “it was not a surprise that the motion to form a 25GBASE-T Study Group was approved without objection”

• “both 25GBASE-T and 40GBASE-T are planned for operation over category 8 cabling and directly connected link segments at up to 30m.” Valerie Maguire, BSEE,

Director of Standards & TechnologyThe Siemon Company

Impact of 10G on space design

• Alien Crosstalk, cable diameter and separation - a smaller size could be dangerous for performances - does shielding help ?

• Shielded cabling is 100 times “stronger” to interference than UTP

• Superior protection against high frequency environmental noise

• Eliminates alien crosstalk

Next generation optical cabling (40/100G)

• Higher density with MTP/MPO

Next generation optical cabling (40/100G)

• Plug & Play, Parallel Optics and MPO / MTP

• Low loss components for 40/100G ?

(*) under dev. - target

Next generation optical cabling (40/100G)

Next generation optical cabling (40/100G)

• Module to Module Configuration (Duplex transmission)

Next generation optical cabling (40/100G)

• MTP® Adapter to LC Trunk

• Future Migration Path for 40 Gb/s and 100 Gb/s (parallel optics)

Next generation optical cabling (40/100G)

• Future Migration Path for 40 Gb/s and 100 Gb/s (parallel optics)

Optical budget for high speed applications

OM4 @40/100G : longer distance than OM3 (150m Vs. 100m), but lower channel lossAssumes total connector loss of 1.0dB

Low loss components can help

• LC BladePatch fibre jumpers: 0.15 dB (typ 0.1 dB)

• Plug and play MTP to LC or SC modules: 0.35 dB (typ 0.25 dB)

• MTP-MTP pass-through adapter plates and MTP fibre jumpers: 0.2 dB

Application Distance

(m)

Max Channel

Loss /

Connector

Loss

Fibre Atten.

(3.0dB/

km)

# of

MTP-LC

cass.

Std Loss

(0.65dB)

# of

MTP-LC

cass.

Low Loss

(0.35dB)

# of

MTP

adapters

Std Loss

(0.4 dB)

# of

MTP

adapters

Low Loss

(0.2 dB)

10Gb OM3

@850nm300 2.6dB / N/A 0.9dB 2 4

40/ 100Gb OM3

@850nm100 1.9dB/1.5dB 0.3dB 4 8

10Gb OM4

@850nm400 2.9dB / N/A 1.2dB 2 4

40/ 100Gb OM4

@850nm150 1.5dB/1.0dB 0.4dB 2 5

Pre-terminated solutions

• Abandoned cable = disordered pathways

• Valuable airspace

• Pathway space waste

• Cable “rat’s nests” create air dams

• Think of trunking cables

• Use re-openable ties

Pre-terminated solutions

• Each leg is labeled for proper outlet orientation

• High quality Plug & Play category ≥6A copper & ≥ OM3 FO cable

• Factory terminated and tested for high performance

• Unique identification number for administrative purposes

• Shielded outlets are automatically grounded upon insertion into panels.

Density vs. Management ?

• Leaving some room for termination and handling is important

• Some solutions could help keep my spaces tight

Flexibility in Rack Density ManagementFiber Bladepatch

• Automatic duplex latching system, pull the boot to remove

• Razor core fibre (OM3/OM4 & OS2)

• Polarity can be changed:

– Removal of top cover

– Rotation of LC sections

– Identification path to show changes to polarity

LightStack™

• LightStack Ultra High Density system is an end-to-end fiber solution for data centers

• Up to 144 fibers (LC interface) and 864 fibers (MTP interface) within 1U

• The LightStack system consists of:

– Enclosures

– Plug & Play Modules

– Adapter plates

– MTP Trunks

– Hybrid MTP to LC Trunks.

Copper/Fiber Combination Panel

• High density panel accommodates copper and fiber• 4 plug and play modules or• 24 copper ports• Shielded copper applications

• Z-MAX, MAX or TERA compatible• Fixed panel design with rear cable management

for copper

Copper/Fiber Combination Panel

Intelligent Infrastructure Management

• The bridge between physical and logical layers

• Controls the physical layer in real time

– Who is connected to what ?

– Who will have to be connected to what ?

– How many ports are still available in my rack ?

– Was my work order executed in the correct way ?

– Where is that hacker ?

– Who made that change ?

– How can I have a truly complete network management ?

Siemon EagleEye Connect

Space design

• What about cabinets with a separated patch zone ?

• Passives and actives have different priorities

• What are the best ideas to keep them sharing the same space.

Space design

• Vertical patching (copper and fiber)

• Vertical cable management

• Horizontal cable management

• Pre-terminated trunking cables, plug-and-play fiber

• Power distribution support

• Thermal management features.

Space design

4x760mm cabsTotal available space:

4x45=180U 3x12= 36U 2x4= 8U

______________224U

5x600mm cabsTotal available space:

5x45 = 225U

4U 45U 12U 45U 12U 45U 12U 45U 4U

Space design

Before..... ...and after !!

DC architecture

• A zoned approach based on true structured cabling:

– Server switching is shared among multiple cabs

– Alternative to Top-of-Rack

– Reduces the number of actives Day1 either in the Access, in the Aggregation and in the Core Layer

– Pay for switch ports as you grow

EN 50600-2-4:2015Information technology Data centre facilities and infrastructures -Telecommunications Cabling Infrastructure

Case study

• 5-6kW /server cab

• 39 server cabs

• 14 servers/cab

• 2 network port/server

Power & Switch Port Utilization

DC architectureA zoned approach will save you money !!

Grow Vertically or Horizontally?

6 m

1 allocated pair of shared PDUs and shared cabling every 2 cabs

Stranded Power Decreased with Shared PDUs

Wrap up

• A proper DC design should include:

– An optimized architecture

– Mid-to-long term view for infrastructure

– Latest / next generation technologies

– A careful budget / ROI estimation

THANKS FOR YOUR KIND ATTENTION !!

Alberto Zucchinali RCDD

Senior Technical Manager

EMEA DC Solutions & Services Manager

alberto_zucchinali@siemon.co.uk