Threaded Case Study - RE Miller (Nick Effler, Brian Ford, Cindy Coultas & Teresa Duchardt) April-May, 2000 b Project Goals Implement WAN Access to connect all the schools within the districtImplement WAN Access to connect all the schools within the district Internet Access to all usersInternet Access to all users Two LANs (Administration and Curriculum)Two LANs (Administration and Curriculum) Allow for growth rate of 1000% in the LAN and 100% in the WAN over a 7-10 year lifeAllow for growth rate of 1000% in the LAN and 100% in the WAN over a 7-10 year life

Technical Specifications b Routers at each school to filter traffic b TCP/IP and Novell IPX Protocols b 10 mbps access to all users b Fast Ethernet (Cat5) b Extended Star topology b Desktops will have a 10/100 NIC Card

Technical Specifications (cont) b Fiber Optic Backbone b 4 UTP runs of Cat 5 to each classroom b 1 Cisco port switch located in each classroom. b 1 Cisco port switch located in each IDF room b 1 Dedicated Line from the switch for LAN Access for Administration

Equipment Needs b 43 Cisco 2924 switches (1 in each classroom and located in each of the IDF) b Cisco Catalyst 6509 Switch located in MDF. Has a supervisor and RSM (routing) modules. 48 port blades. Starting out we will utilize 3 10/ port blades. Additional 48 port blades can be added to accommodate growth rate.

Equipment Needs (Cont.) b Routing is done through the RSM module of the Cisco 6509 switch. Purchase the fiber ports module. An additional 1601 Cisco router will be needed for Frame Relay b Access lists will be used for permitting and denying access b RSM module - each interface has its own IP address. Each interface assigned necessary access lists

Addressing Scheme b Class A address to be obtained from ISP for the WAN b Multiple subnets (including the following): subnet for the cisco switchessubnet for the cisco switches subnet for administratorssubnet for administrators subnet for each classroomsubnet for each classroom Additional subnets to be added as needed for growthAdditional subnets to be added as needed for growth

Servers b DNS b b Admin b Application b Library b Webserver b DHCP

Servers (Cont) b Administration Workgroup b Student Workgroup b All Servers will be located in the MDF Room b Additional Workgroup Servers can be added as growth rate requires.

Security b All users will have a network logon ID and Password. b All users will be forced to change their password every 30 days b Access Lists will be set up on the routers to permit/deny appropriately

Router Configuration b Design layout

Justifications b A Cisco port switch located in each room. Each port has its on bandwidth and is its own collision domain. b A cisco port switch located in each of the IDF rooms with a purchased fiber module to run between IDF and MDF. b A Cisco 6509 switch located in the MDF. Accommodates a lot of room for growth.

Justifications (cont.) b Switching will be used to provide segmentation b Fragment Free switching selected to reduce latency b VLANs used to provide a cost-effective and ease of administration solution. Truncating VLANs keeps management down by setting them up on the 6509 switch only

Justifications (Cont.) b Access Lists are used to control the traffic as necessary between the LAN segments b Fiber used between MDF and IDF to provide secure 100 mbps for the backbone

Justification (cont.) b Cat 5 UTP Full duplex 100 mbps to servers between devices for high-speed dedicated bandwidth b Asymmetrical switching to meet the 10 mbps user access b Extended Star Topology provides ease of maintenance as the growth rate occurs

Analysis b Strengths Simple topology with ease in maintenanceSimple topology with ease in maintenance Ease in administrationEase in administration Broadcast Domains are nicely sized (Vlans)Broadcast Domains are nicely sized (Vlans) b Weaknesses Cabling set at Cat5 limits our bandwidthCabling set at Cat5 limits our bandwidth Length of cable runs can be a weakness to accommodate growth ratesLength of cable runs can be a weakness to accommodate growth rates