Module CSY3021

Network Planning and Programming

RD-CSY3021-08/091

Network Planning Planning LAN

Planning IP networkAddressing

Interconnection devices VLAN (Virtual LAN)

Planning WAN WAN technologies

Frame Relay, ATM, DSL, Network Security

VPN (Virtual Private Network) Firewall NAT (Network Address Translation)

RD-CSY3021-08/092

Network PlanningPlanning a network can be quite a Herculean task. Planning involves:

Estimating Bandwidth requirements Planning Network reliability Reach and Mobility SecurityConvergence Operating Costs

RD-CSY3021-08/093

Capacity PlanningRaw bandwidth capability is growing rapidly

Bandwidth requirements have moved upLAN

10 Mbps to ~ GbpsWAN:

56Kbps on Modem to Mbps to ~GbpsPlanning LAN cabling requirements

Applications driving bandwidth requirementsUse of Internet as a Business toolvoice communication using Internet (VoIP)Multimedia nature of traffic

Need for wireless bandwidthRD-CSY3021-08/094

Capacity Planning - cont

Wireless bandwidthIncreased mobility of personnel

New emerging wireless standards

Integration with GPRS

RD-CSY3021-08/095

Planning Network ReliabilityNetworks expected to be up and

running round the clockMinimise Downtime

Planned downtime Maintenance, upgrade,

reconfigurationUnplanned downtime

RD-CSY3021-08/096

Minimise Planned downtime Choosing equipment that can be

serviced without disconnecting Hot standby/ redundant

E.g., Server farms Equipment should be capable of

handling multiple protocols and standards. e.g., equipment upgraded from

Ethernet to Fast Ethernet RD-CSY3021-08/097

Planning Reach and Mobility Networks becoming increasing wireless

PAN, LAN, WAN Wired network designed for

Variety of equipment Laptops, PDA, mobile phones

Variety of protocols, speeds, formats

RD-CSY3021-08/098

Planning SecurityApplications carrying more

business critical data Selecting equipment with in-built

security options Mobile users need to access

network from outside Security on Wireless network

RD-CSY3021-08/099

Convergence Design flexible network Handle multitude of available protocols Select core network equipment – Switch,

router and gateways to handle multiple protocols

New wave of Integrated CommunicationsConvergence of application, services and

devicesVoice meets data Wireless meets fixed-line

RD-CSY3021-08/0910

Operating CostHigh operating cost for WAN connectivity Operating costs are also a function of

consolidating various WAN services with one service provider versus spreading it across various service providers.

Charges may vary depending on the communication protocol being used. Frame relay, ATM and IP may have different rates

RD-CSY3021-08/0911

Network DesignHierarchical network A network with different layers

Each level of the network has it own functionMinimise costs

Avoid spending money to buy unnecessary feature of equipment to each layer requirements Save bandwidth due to modularity of design

Scalability is the major goalFast convergence

Route summarisation

RD-CSY3021-08/0912

Typical Network Layout

RD-CSY3021-08/0913

TaskGet yourselves in groups and discuss

What is involved in planning a home network?

Prospective solutions ???

RD-CSY3021-08/0914