presented by doug stopper technical vitality seminar
TRANSCRIPT
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