## (1) LAN User Requirements Document

Note: this is the same as the WAN requirements documentation, execept I have highlighted only those sections relevant to our LAN design.

### 1. Overview: District WAN and LAN

- Implement a LAN for local school
- Requirements:
  - (US) $200,000 budget for each school
  - > 7-10 years functionality
  - > 100 times growth
  - > 1 Mbps to every host computer
  - > 100 Mbps to every host server
  - must satisfy TIA/EIA-568-A standards

### 2. School District WAN Specs

- District schools connect to each other & to Internet via WAN
- Requirements:
  - 3 (interconnected) regional Hubs form the core:
    - District Office Center (single point for all Internet connectivity)
    - Service Center
    - Shaw Butte Elementary School (also includes a community school)
  - each connects to 11 schools
  - Protocols: TCP/IP & Novell IPX only

###
3. School District LAN Specs

There will be 2-segments in each school & also the District Office

- Transport Speeds:
  - 10Base-T
  - 100Base-T
  - 100Base-FX
- Media:
  - Horizontal cable = 100Mbps CAT5 UTP
  - Backbone cable = multimode fibre-optic
- LAN Infrastructure:
  - based on Ethernet LAN switching
- MDF:
  - central point for LAN cabling attachment
- POP for WAN connection
  - Houses major electrical components
- IDF's:
  - used where horizontal cable > 100m or where site conditions dictate
  - connect to MDF in star or extended star topology
- Each Room:
  - has own POP with lockable cabinet for: electrical components & cable terminations
  - supplied with 4 CAT 5 UTP runs (via decorative wire molding)
    - 1 terminates at teacher's (admin) workstation
    - each is tested for 100Mbps capacity
  - supports 24 workstations

### 4. Servers

- All file servers are categorized as: enterprise or workgroup
  - enterprise - attaches to MDF
  - workgroup - may attach to IDF

Each school will have its own:

- Domain Name Servers (DNSs) & Email Delivery Server:
  - maintain complete directory of all staff & students
  - e-mail server - acts as local post office box & stores all e-mail messages
  - (enterprise)
- Administrative Servers:
  - houses student tracking, attendance, grading & other admin functions
  - available to administration only
  - (workgroup)
- Library Server(s):
  - automated library information & retrieval system - available to entire school
  - will house online library
  - (enterprise)
- Application Servers:
  - houses common user applications (including MS office applications)
  - provides for efficient upgrading of applications
  - (enterprise)
- Other Servers:
  - will all be considered departmental
  - placed according to needs
  - (workgroup)

### 5. Addressing and Network Management

- At the District Office, a master network management host will:
  - administer complete TCP/IP addressing & naming convention
  - have management rights over all devices
  - store all router configurations
- admin computers will have static addressing
- curriculum computers will use DHCP
- each regional location will:
  - house a regional network management host to support its area
  - use SNMP standards

### 6. Security

Each school has:

- 3 logical classifications (with secure interconnections):
  - Admin
  - Curriculum
  - External
- 2 physically separate LANs (admin & curriculum)
  - ACL's (on routers) will prevent curriculum accessing admin
  - Admin will be able to access curriculum *
  - e-mail & DNS will pass feely between all LANs
  - each LAN segment will have a file server
- strict user ID & password policy
- Internet connectivity (from all computers) provided through double firewall
  - will refuse external connections via Internet

### 7. Internet interconnectivity

- Internet interconnectivity will be:
  - supplied though District Office (a single point of contact)
  - available from all schools
  - via double firewall implementation
    - ACL's will prevent connectivity from the outside Internet

- A public backbone will be used for Internet exposed services including:
  - e-mail & DNS - which will pass freely in both directions (they pose no risk)
  - a Web server - will allow all schools to upload a home page
  - any other additional web servers

### 8. User Counts

- For each school assume:
  - max 250 curriculum computers
  - max 75 admin computers
  - each location must accommodate up to 25 computers and include:
    - 1 run for a single teacher/admin computer
    - 3 runs for student/curriculum computer

### 9. Extra LAN Requirements (not specified in origional)

- IGRP (which is more efficient than RIP) will be the only routing protocol used in the LAN.
- VLANs will be used to logically seperate teachers & students.