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POCS Seminar Series 2006. Network Design (Practical design of a network for Dowling College). by Georgi Todorov Dowling College Oakdale, NY, 11769 http://mcs.dowling.edu/POCS/. Creative Commons Attribution-ShareAlike2.5 License. Outline. What is a network? How do we design one?

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Network design practical design of a network for dowling college

POCS Seminar Series 2006

Network Design (Practical design of a network for Dowling College)

  • by Georgi Todorov

  • Dowling College

  • Oakdale, NY, 11769

  • http://mcs.dowling.edu/POCS/

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Outline
Outline

  • What is a network?

  • How do we design one?

    • What are the requirements?

    • What information do we need and how do we get it?

    • What are the optimal solutions that will meet the requirements?

      • Structured Cabling Standards

      • Safety

      • Tools

      • Installation Process

      • Proposed Solution

by Georgi Todorov

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What is a network
What is a network?

  • “A computer network is a system for communication between computers.” - Wikipedia[1]

by Georgi Todorov

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How do we design a network
How do we design a network?

  • Requirements

  • Collect information

  • Current technologies and how can they help us meet the requirements

by Georgi Todorov

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Requirements @ dc
Requirements @ DC

  • Services:

    • WWW - Web site of the college

    • Mail - (webmail, pop3, smtp, imap4)

    • DNS - (address resolution and propagation)

    • Internet connection

    • Intranet

by Georgi Todorov

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Requirements @ dc 2
Requirements @ DC(2)

  • Security:

    • Admin Network

    • Students Network

    • Faculty Network

    • Dorms Network

    • Wireless Network

by Georgi Todorov

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Information
Information

  • Cabling:

    • Building blueprints - drawings that provide distance information, service outlet location

    • Floor plans

    • Site plans for overview of the project

    • T-drawings - telephone placement

    • E-drawings - electrical reference

    • A-drawings - discover architectural features and available pathways

by Georgi Todorov

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Information 2
Information(2)

  • Other:

    • Number of faculty offices

    • Number of classrooms

    • Number of staff offices

    • Computer labs location and number of computers

    • Other information

by Georgi Todorov

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Dc information
DC Information

  • Racanelli:

    • 37 rooms used for classes

    • 1st floor: 4 labs, library, Student Services(11 hosts), Cafeteria

    • 2nd floor: Int. Student Office(4 rooms), 15 rooms, library (10 hosts)

    • 3rd floor: 32 rooms

    • 4th floor: 24 rooms, Science? Office (4 rooms)

by Georgi Todorov

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Dc information 2
DC Information(2)

  • Kramar Science Center:

    • 13 rooms in KSC used for classes

    • 0th floor:12 rooms

    • 1st floor: 22 rooms

    • 2nd floor: 6 biology labs

    • 3rd floor: 10 offices

by Georgi Todorov

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Dc information 3
DC Information(3)

  • Fortunoff Hall:

    • No rooms for classes

    • 0th floor: 24 rooms

    • 1st floor: 10 rooms

    • 2nd floor: 30 rooms

    • 3rd floor: 10 rooms

by Georgi Todorov

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Dc information 4
DC Information(4)

  • Student Dorms:

    • No rooms for classes

    • 1st floor: 2 x 12 rooms = 24 rooms

    • 2nd floor: 2 x 12 rooms = 24 rooms

    • 3rd floor: 2 x 14 rooms = 28 rooms

by Georgi Todorov

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Dc information 5
DC Information(5)

  • Other buildings:

    • Security Building

    • Performing Arts Center

    • Curtin Student Center

    • EDN

    • EDS

    • Brookhaven Campus

by Georgi Todorov

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Technologies standards
Technologies & Standards

  • Why follow standards?

    • They are not vendor specific

    • They are widely used

    • They are officially specified

    • They work

by Georgi Todorov

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Telecommunications industry association tia and electronic industries alliance eia
Telecommunications Industry Association (TIA) and Electronic Industries Alliance (EIA)

  • TIA/EIA-568-B.1 -> Commercial Building Telecommunications Cabling Standard - General Requirements

  • TIA/EIA-568-B.2 -> Balanced Twisted Pair Cabling Components

    • Only 100-ohm Category 3, 5e, and 6 cables are recognized

    • Category 5e or greater is now the recommended cable for 100-ohm twisted pair

    • When terminating Category 5e and higher cables, the pairs should not be untwisted more than 13 mm (0.5 inch) from the point of termination

  • TIA/EIA-568-B.3 -> Optical fiber Cabling Components

  • TIA/EIA-568-B -> Cabling Standards

  • TIA/EIA-569-A -> Commercial Building Standard for Telecommunications Pathways and Spaces

  • TIA/EIA-570-A -> Residential and Light Commercial Telecommunications Wiring Standard

  • TIA/EIA-606 -> Administration Standard for the Telecommunications Infrastructure of Commercial Buildings

  • TIA/EIA-607 -> Commercial Building Grounding and Bonding Requirements for Telecommunications

by Georgi Todorov

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Cat 5e vs cat 6 and up
Cat 5e vs Cat 6 and up

  • Main difference is in the spacing between the pairs inside the cable.

  • Cat 6 and 7 are fully shielded. Each pair has a foil wrap and a braided sheath surrounds the four foil-wrapped pairs.

by Georgi Todorov

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Safety
Safety

  • Many many standards!

    • Occupational Safety and Health Administration (OSHA)

    • Material safety data sheet (MSDS)

    • Underwriters Laboratories (UL)

    • National Electrical Code (NEC)

    • TIA/EIA-607-A

  • Important: Grounding - TIA/EIA-607-A

  • No loose or baggy clothes

  • Sturdy, fully enclosed shoes

  • Safety glasses

  • Even hard hats

by Georgi Todorov

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Tools
Tools

  • Patch tool -> patching

  • Cable tester -> testing the signal/cable

  • (multi-pair) impact tool -> patching

  • Cable stripping tool

  • Electrician scissors

  • Cable knife

  • Stud sensor -> checking the walls

  • Measuring wheel

  • Fish tape -> retrieval of wires inside walls

  • Cable tree -> supports cable reels

by Georgi Todorov

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Glossary
Glossary

  • MDF -> Main Distribution Facility - Usually a room that concentrates all cable runs in a building, stores servers routers etc. (Vertical Cabling)

  • IDF -> Intermediate Distribution Facility -> a room or a closet that concentrates cable runs from a single floor can have switches and/or routers.(Horizontal Cabling)

by Georgi Todorov

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Cabling
Cabling

  • Install all cables in the ceilings, walls, floor, ducts and risers and label them on both sides

  • Terminate cables and install patch-panels

  • Test the cables, troubleshoot and certificate

    • Testing -> is there a signal

    • Certification -> how well the signal is carried from one end to the other by the wire

by Georgi Todorov

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But what cables to use
But what cables to use?

by Georgi Todorov

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Design 1
Design(1)

  • Oakdale Campus:

  • 4 buildings: Racanelli, Fortunoff, Kramar, Dorms.

  • RC, FH, KSC -> 4 floors each; Dorms -> 3 floors.

  • Good design:

  • 1 MDF in each building

  • 1 IDF on every floor

by Georgi Todorov

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Design 2
Design(2)

  • Consider:

  • Fortunoff and Kramar = 1 building?

  • => 1 MDF for Fortunoff/Kramar

  • Is an MDF @ the Dorms a good idea?

  • Security

  • Administration

  • Kramar: 2nd floor only 6 rooms and 3rd floor about 10 rooms -> 1 IDF for both floors?

by Georgi Todorov

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Dowling college
Dowling College

by Georgi Todorov

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Design 3
Design(3)

  • Let’s start drawing!

by Georgi Todorov

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Dowling college backbone
Dowling College Backbone

by Georgi Todorov

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Racanelli floor 1
Racanelli Floor 1

by Georgi Todorov

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Racanelli floor 2
Racanelli Floor 2

by Georgi Todorov

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Racanelli floor 3
Racanelli Floor 3

by Georgi Todorov

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Racanelli floor 4
Racanelli Floor 4

by Georgi Todorov

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Fortunoff floor 0
Fortunoff Floor 0

by Georgi Todorov

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Fortunoff floor 1
Fortunoff Floor 1

by Georgi Todorov

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Fortunoff floor 2
Fortunoff Floor 2

by Georgi Todorov

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Fortunoff floor 3
Fortunoff Floor 3

by Georgi Todorov

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Kramar floor 0
Kramar Floor 0

by Georgi Todorov

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Kramar floor 1
Kramar Floor 1

by Georgi Todorov

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Kramar floors 2 3
Kramar Floors 2 & 3

by Georgi Todorov

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Dorms floor 1
Dorms Floor 1

by Georgi Todorov

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Dorms floor 2
Dorms Floor 2

by Georgi Todorov

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Dorms floor 3
Dorms Floor 3

by Georgi Todorov

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Oakdale campus
Oakdale Campus

by Georgi Todorov

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Oakdale campus 2
Oakdale Campus(2)

  • 1,2 or 3 GBit Fiber between MDF1 and MDF2(depending on budget)

  • 1GBit fiber or cat6 between IDF and Servers and IDF and MDF (depending on budget)

  • 100mbit cat5e or cat6 between IDF and nodes

by Georgi Todorov

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Totals
Totals

  • Approx 800 nodes(PCs, Printers, Servers, Switches, etc.)

  • Average cable run 70m (230 ft)

  • Approx 5600m cable (18380ft)

  • Approx number of 24 port switches: 70

by Georgi Todorov

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But what cables to use1
But what cables to use?

by Georgi Todorov

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Oakdale campus1
Oakdale Campus

by Georgi Todorov

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Technologies
Technologies

  • 100BASE-TX -> cat 5 upto 100m (328 feet) (RJ45)

  • 1000BASE-T -> cat 5e upto 100m (328 feet) (RJ45)

  • 1000BASE-SX -> micro multimode fiber upto 275m (853 feet) for 62.5 microfiber and 550m (1804.5 feet) for 50 micro fiber

by Georgi Todorov

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Prices
Prices

  • cat 5e Approx. 20c/m (6c/ft) ($100-$200 per run)

  • cat 6 Approx. 55c/m (17c/ft)

  • multimode fiber Approx. $1.5/m (46c/ft)

  • 1GBitE fiber module for CISCO switch-> $30-$40

  • Cisco switch -> ???? ($N00-$N000)

by Georgi Todorov

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Limits
Limits

  • TIA/EIA-569-A standard -> Demarcation point (where the internet comes to the customer), Equipment rooms etc:

    • - A distribution rack must have a minimum of 1 meter (3 feet) of workspace clearance in the front and rear of the rack.

    • - A full equipment cabinet requires at least 76.2 cm (30 inches) of clearance in front for the door to swing open.

    • - Equipment cabinets are generally 1.8-m (5.9-feet) high, 0.74-m (2.4-feet) wide, and 0.66-m (2.16-feet) deep.

  • TIP: patch panels should not be high on a rack mount, however servers and switches should be at the bottom for stability.

  • ANSI/TIA/EIA-568-B specifies -> metering of cables

    • - 5 m (16.4 feet) of patch cord to interconnect equipment patch panels

    • - 5 m (16.4 feet) of cable from the cable termination point on the wall to the telephone or computer

    • - 90 m (295 feet) of cable run from patch panel to the outlet

by Georgi Todorov

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Patch panels
Patch Panels

by Georgi Todorov

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Labeling

@IDF/MDF

@Room

KSF1R1A

R1AKSF1

KSF1R1B

R1BKSF1

KSF1R1C

R1CKSF1

KSF1R2A

R2AKSF1

KSF1R2B

R2BKSF1

KSF1R2C

R2CKSF1

KSF1R3A

R3AKSF1

KSF1R3B

R3BKSF1

KSF1R3C

R3CKSF1

Labeling

  • Label every end of every cable

  • Use a labeling scheme that can be self-identifying if possible

  • Ex:

by Georgi Todorov

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Ip addressing
IP Addressing

  • 800 nodes

    • 4 Class C networks = 1018 ips

    • 5 networks required:

      • Admin Network

      • Students Network

      • Faculty Network

      • Dorms Network

      • Wireless Network

    • Solution: Subnetting

by Georgi Todorov

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Subnetting
Subnetting

  • 1 possible solution is 3 /24 networks and 2 /25 networks

  • 149.72.70 - 149.72.74:

    • Depending on users

    • 149.72.74.0/24 can be divided like this:

      • 149.72.74.0 - 128/25 = 126 nodes

      • 149.72.74.129-255/25 = 126 nodes

by Georgi Todorov

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Wireless
Wireless

  • 802.11a/b/g

by Georgi Todorov

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Internet connection
Internet Connection

by Georgi Todorov

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Second campus
Second Campus

Lightpath's E-Line Pricing:

Mbsp Price per month

10 $1,300

20 $1,970

50 $2,150

100 $3,005

150 $3,610

300 $5,415

by Georgi Todorov

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Documentation
Documentation

  • Document ALL STEPS during your design and cabling

  • Prepare a reference table with labels

  • Prepare a reference table with IPs

  • Prepare a reference table with ip<->name matching

  • Prepare an updated blueprint of the building with all new cable runs

  • Document everything else

by Georgi Todorov

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What have we done
What have we done

  • Full logical structure of the network

  • Estimated cable lengths

  • Labeled cables

  • Followed all standards

  • Covered all requirements

  • Completed the network design

  • Missing:

    • Node Configurations

    • Physical location of IDFs and MDFs

    • Specified equipment

by Georgi Todorov

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Questions
Questions?

by Georgi Todorov

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References acknowledgment
References & Acknowledgment

  • http://en.wikipedia.com/wiki/network

  • http://www.optimumlightpath.com

  • http://www.cisco.com/

  • http://www.tiaonline.com/

  • http://google.com

  • Thanks to:

  • Amitava Das ([email protected]) and Herbert Bernstein ([email protected])

by Georgi Todorov

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Thank you
Thank You

by Georgi Todorov

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