Presented by Doug Stopper

Technical Vitality Seminar

Network Design II:

Building A Solution

(A Site Example)

Purpose

• To build a network solution based on the requirements gathering process (presented last week).

• To use the requirements to choose the right technologies and architectures.

• To understand that there needs to be an equal balance of cost and performance when building the network architecture

A Site Example

• To use the LM Owego site as an example network architecture.

• Parameters– Large Scale LAN upgrade– Focus on emerging technologies– Support a 5000 Node network– Provide an acceptable level of performance– Stay within cost restraints

Things to Consider for the Design

• Rapid Evolution of Network and Computing technology

• Must remain Competitive/Productive

• Need support for 5000+ nodes

• Desktop technology requires higher bandwidth requirements (IPTv, Streaming Web Technologies, Email w/ attachments, Backups, etc…..

Defining Requirements for LM Owego

• What is the geographical coverage needed?

– Local Area Network: Span one or more buildings on the campus

– Approximately 45 wiring closets (LAN rooms) spread over 15 buildings

– Closets Vary per building (1-9 closets)

Defining Requirements for LM Owego

• What is the type of traffic?

– Voice• Separate Infrastructure – Stable for now

– Data• All types: Mission critical, normal, non-critical

– Video• IPTV based only, and Streaming Video on Network

• IPTV system is tuned for LAN based traffic

Defining Requirements for LM Owego

• How many nodes on your network?

– Need support for a minimum of 4000 nodes

– Needs to be scalable to support more nodes in the future

• In the form of Users & Servers

Defining Requirements for LM Owego

• How Many Servers need to be supported?– Servers require higher bandwidth, reliability, and redundancy

• Approximately 95 Unix Servers (AFS, CAD, etc…)

• Approximately 35 Intel Servers (Print Servers, File Servers, Exchange Servers)

• Several OS/2 Servers (Legacy Server Environment)

• Equates to High Traffic Requirements

Defining Requirements for LM Owego

• What facility limitations are present?

– Can the walls be fitted with cables– Are there LAN rooms– Is there a backbone to a centralized area

• Already an existing cable infrastructure (Token- Ring cable)

• Use this existing infrastructure – can support up to 100 Mbps within distance limitations

Defining Requirements for LM Owego

– Can the walls be fitted with cables– Are there LAN rooms– Is there a backbone to a centralized area

• LAN closets Exist

• Core area Exists (just the space)

• No Network Mgmnt. Area. – Needs to be created

• Already an older type fiber backbone from closet to core– Older technology, Fiber Paths not labeled/documented well

Defining Requirements for LM Owego

• What is the term of the network?

– For how long will it be in place?• Permanent configuration• No foreseeable termination of network services• Must be scalable to more nodes and newer

technologies

Defining Requirements for LM Owego

• How secure does the network need to be?

– Need a high level of network security

• Firewalls (protect intranet)• Authentication servers (verify users)• Intrusion detection (prevent network penetration)• Virtual Private Networks (secure remote users)

Defining Requirements for LM Owego

• What services are needed?

– Email Services– Domain Name Service (DNS)– IP Address management (DHCP)– LAN resource services – Backup Services– Unix Services (AFS, MCAD, etc…)– Printer Services

Defining Requirements for LM Owego

• What LAN access methods are available in the geographic region?

• Current – Token Ring– Problems – Insufficient Bandwidth, legacy technology, more

expensive

• Solution – Switched Ethernet, 10/100 access– dedicated bandwidth to desktop– reasonable $$ to implement technology– Standardized and supported

Defining Requirements for LM Owego

• What are the cost restraints?– Must fit the budget to supply the following:

• Fit-up for all PC’s Network Interface Cards• LAN Closet Switches• Any new supporting fiber backbone needed• Any other New Cabling• Core Equipment• Network Management equipment• Power backup systems• Labor – Install, configure Test• Maintenance on equipment• Any other recurring costs

Approaching a Network Design

• Examine all gathered statistics• Previous Slides

• Educate yourself on traffic requirements

• Choose the networking technologies that will best suit your needs

– IP, Ethernet, ATM, MM Fiber, Cat V cable, etc…

Review the LAN Architecture

• Switched Ethernet Environment to Desktop– Each user has a DEDICATED 10Mbps link– New NICS/Cables/Closet Switches– Switches Scalable to 100Mbps– Switches Scalable to more users– Switches Scalable to new technologies

• New ATM fiber Backbone– New Campus Fiber Backbone Installed– Runs from every LAN closet to the 101a raised floor– LAN Switch-to-Core access method ATM

(OC3-155Mbps)

The LAN Architecture

• New Network Core (101a - Raised Floor)

– Routers and ATM switching equipment– Completely fiber switched environment– Scalable to more traffic / LAN rooms– Fiber Patch termination Area– Rack System– Development area (1 of each device)

The LAN Architecture

• New Network Operations Center

– house all management operations– Network Management Software (HP OPENVIEW)– Sniffer Software (to closely examine traffic

problems)– DHCP Server – Hand out IP Addresses– Other Various monitoring tools and systems

• Measure utilization, configurations, inventory, etc…

Pricing the LAN Architecture

• Telecom Project Cost Evaluation

– Total Purchase Cost: For all HW and SW (only a fraction of the total cost)

– Labor Costs: To Plan, Install, and Maintain (Outweigh product purchase cost)

Pricing the LAN Architecture

• Telecom Project Cost Evaluation

– If the costs meet the budget

IMPLENENT!!!

Pricing the LAN Architecture

• Telecom Project Cost Evaluation– If the costs don’t meet the budget:

• Determine where to make cuts– Network Management– Cabling Infrastructure– Security– Brand Names– Outsource or not – for implementing

– Re-evaluate, and make decisions

Solutions - Wiring Closets

Solutions - Network Core

R a ck 3 R a ck 4 R a ck 5 R a ck 6 R a ck 7 Ra ck 8

See Netscape

Solutions - Network Core(Setup Table & Fiber Patches)

Solutions - Network Operations Center

The Future of the LMFS Network

• Scalable to new networking technologies

• Scalable to new business applications

• Scalable to more users

• Extended management capabilities

• Remain competitive in the IT arena

• Maintain high productivity