WANINLAB California Institute of Technology

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WAN-IN-LABCalifornia Institute of Technology

• Physical design, Power distribution
  Air-conditioning
• Elvin Nixon, Nick Grewal, George Lee, Raj Jayaram

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Heads-Up The Complete Network
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Heads-Up Core Network
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Heads-up 13 ONS15454 Optical Nodes
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Physical lay-out Power distribution 386 SqFt
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DC Power distribution
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Lighting lay-out
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Physical lay-out features

• Located just opposite to Net-lab, easy/secured
  access.
• 386 SqFt, entire space used as machine room
• Hosts Liebert cooler air-condition calculation
  depicted in later slides
• Hosts DC centralized power supply rack
• AC circuit outlets breaker panels provided at
  required points
• Hosts 12 telecom standard racks with cable
  manager.
• Hosts cable trays (for overhead power/network
  drops)
• Condensation/humidity factors taken into account
• False ceiling provided along with air-vents at
  appropriate places
• Raised floor not desired to conserve space/cost.
• 1GE Out-of-band uplink connection provided by IST
  department via overhead network drop we plan to
  use an aggregation switch downstream.

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Wattage Chart

• ITEM WATTAGE QTY WATTage Comments
• ONS15454 30A_at_1060W 13 14KW -48V DC
• Cisco7613 30A_at_4000W 4 16KW 208240 AC
• 1U Servers 10A_at_400W 30 12KW 110V AC
• Misc 10A_at_8000W 1 08KW 110v AC
• TOTAL 50KW connected load

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Power distribution features

• Capable of handling 50KW of connected load.
• Centralized DC supply (-48v for ONS 13 units)
  being provided by contractor, with battery bank,
  in a single isolated rack.
• DC cabling done by contractor upto the ONS units
  using overhead cable drops.
• AC supply (208240V for Cisco7613 4 units) being
  provided by Caltech Electrical department.
• AC supply (110V for 30 servers) being provided by
  Caltech Electrical department.
• AC power drops provided direct from points at
  appropriate places using overhead drops.
• AC circuit breakers provided at centralized
  location.
• UPS systems (with built-in isolation
  transformers) provide a backup of 10minutes for
  all units shall be provided.

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Cooling Requirements

• Formula used
• Watts x (0.860)Kcal/hour Watts x
  (3.414)Btu/hour Btu/hour divided by 12,000tons
  of refrigeration required
• So, for the connected load of 50KW amount of
  cooling required is
• 50000 x 3.414 170700 Btu/hour
  
  170700/12000 14.225 tons of cooling
  required.
• The Liebert cooling system is capable of
  providing a lot more than the above requirement.

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Rack Cable distribution
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Rack Cable distribution features

• Telecom standard racks are used Diemensions
  ??x??x??
• ONS series (13 units) will go into racks 2 to 6.
  -48v power drops will be provided by the
  centralized DC supply.
• 7613 series (4 units) will go into racks 1 7.
  240V AC power drops will be provided from points
  that are located at appropriate places.
• 1U rack-mount servers will go into racks 8 9.
• There is lot of room to add more racks in the
  future.
• Each rack has a cable management panel.
• Overhead cable trays are used to carry power
  drops and network/console cable drops seperately.
• Console ports for all these units are connected
  using TIP/Terminal servers.
• Management (OutOfBand) ports are connected to an
  aggregation switch and the uplink of 1GE is
  provided by IST department.
• Fiber spool storage spaces are available in the
  racks itself.
• Connection to external networks (fiber drops)
  like CACR/HEP is extended from the next building
  into this facility.

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Schedule Current status

• Action items
• Order Liebert cooling system (done)
• Clean-up the Jrg lab space (done)
• Wall floor work. (in-progress)
• AC Power supply installation. (not yet started)
• Lighting cable tray (not yet started)
• Overhead Power drops installation. (not yet
  started)
• DC Power installation (contractor work) (not yet
  started)
• Liebert Cooler installation. (not yet started)
• Racks installation. (not yet started)
• ESTIMATED DATE OF COMPLETION
• 6 weeks (from Oct 11th).