1 Nexans Cabling Solutions

Increasing Energy Efficiency

IT Room Infra 2011 de Kuip Pieter Heijnen

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Connecting the dots, in a reliable way

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Consider design & flexibility of structured cabling

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IT will be more polluting than

(the Economist)

Unrestrained IT power consumption could eclipse hardware costs and put great pressure on affordability, data center infrastructure and the

Luiz André Barroso, (Google)

Trends

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How to reduce energy consumption?

1. Power down servers and switches when idle

2. Reduce power when transceivers are in use

3. Monitor and manage where energy is used

4. Consider design and flexibility of structured cabling

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Power down servers and switches when idle

~ 80% ~ 90% Servers in idle state use up to 80% of full load power

Switches in idle state use up to 90% of full load power

Energy Efficient Ethernet (EEE): Low Power Idle

Puts devices to sleep Wake-On-LAN Brings devices back out of sleep

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Power down servers and switches when idle

Bron: www.intel.com

Bron: infoworld

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Large energy savings possible (e.g. up to 58% saving at 40% utilisation)

Works on Ethernet auto-negotiation

Requires copper cabling

auto-negotiation not available on fibre

External noise could affect recovery time

Shielded cabling better choice

Power Saving with EEE

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Reduce power when transceivers are in use

Full power Power Backoff using 10GBase-T

Turn down transmit power over shorter distances

Full power

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Benefits of higher grade cabling

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>95 .34.1 0

Power Backoff Scale

75-85 26.9-30.5 4

85-95 30.5-34.1 2

55-65 19.8-23.4 8

65-75 23.4-26.9 6

25-45 9.0-16.2 12

45-55 16.2-19.8 10

Length (m) IL 250 MHz (dB) Backoff (dB)

0-25 <9.0 14

Example: 50m Channel: Class EA Insertion Loss > 16.5dB Class EA PBO 10dB LANmark 7a Channel Insertion Loss 13.6dB LANmark 7a PBO 12dB Lower transmit power = greater energy savings

IEEE Power Backoff Scheme

Benefits of higher grade cabling

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Reduce power when transceivers are in use (2)

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Data Centre design flexibility

Top of Rack or Structured Cabling?

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Top of Rack configuration

Advantages:

Cost saving on horizontal copper cabling

Reduction volume of cables under floor

Suitable for high density blade servers

Disadvantages:

Poor Switch port utilisation

Inefficient Power consumption

Extra Maintenance & administration

Expensive & difficult Scalability

Configuration flexibility?

Extra Cost of switches fibre copper

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Structured Cabling in data centres

Advantages:

Increased switch port utilisation

Superior energy efficiency

Quickly adapt the system

Easier network expansion

Excellent flexibility

Overall lower cost of ownership

Disadvantages:

More cables needed

More racks needed

Length restrictions on horizontal copper cabling to be respected

fibre copper

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Benefits of structured copper cabling

Design flexibility - Longer length, 100m compared to 7m

twinax infiniband - Better port utilisation

No hotspots

LANmark 6A - Shorter links 5m compared to 15m

No air dams

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Monitor and manage where energy is used

EMAC Horizontal PDU - manageable

Reports for power usage / temperature / humidity

EMAC Rackmanager

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Benefits of higher grade copper cabling

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Summary

So basically we can save energy due to:

1. Power down servers and switches when idle

2. Reduce power when transceivers are in use

3. Monitor and manage where energy is used

4. Considering design and flexibility of structured cabling

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https://www.nexans.co.uk/eservice/Netherlands-nl_NL/navigate_266412/Energy_Efficiency.html

More on Energy Efficiency ...

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Connecting the dots, in a reliable way

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Invitation to meet Nexans experts

We are happy to invite you, and meet our Nexans Experts:

1. Showcasing our latest LAN innovations

LANmark 6A (multipair & preterm), LANmark 7A & GG45

LANmark OF (MPO solution ready for 40/100G)

LANsense Intelligent Infrastructure Management

2. Discussing and help you with:

latest (DC) standardisation

energy efficiency

network strategy & design Located in Buizingen (Belgium) near Brussels

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Vragen ?

Pieter Heijnen Nexans Cabling Solutions pieter.heijnen@nexans.com