Threaded Case Study Acacia Nick Effler, Brian Ford, Cindy Coultas

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Threaded Case Study - Acacia(Nick Effler, Brian
Ford, Cindy Coultas Teresa Duchardt)April-May,
2000

• Project Goals
• Implement WAN Access to connect all the schools
  within the district
• Internet Access to all users
• Two LANs (Administration and Curriculum)
• Allow for growth rate of 1000 in the LAN and
  100 in the WAN over a 7-10 year life

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Technical Specifications

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

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Technical Specifications (cont)

• Fiber Optic Backbone
• 4 UTP runs of Cat 5 to each classroom
• 1 Cisco 2924 24-port switch located in each
  classroom.
• 1 Cisco 2924 24-port switch located in IDF room
• 1 Dedicated Line from the switch for LAN Access
  for Administration

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Equipment Needs

• 44 Cisco 2924 switches (1 in each classroom and
  located in the IDF)
• 2924 switch in IDF needs fiber module
• Cisco Catalyst 6509 Switch located in MDF. Has a
  supervisor and RSM (routing) modules. 48 port
  blades. Starting out we will utilize 3 10/100 48
  port blades. Additional 48 port blades can be
  added to accommodate growth rate.

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Equipment Needs (Cont.)

• 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
• Access lists will be used for permitting and
  denying access
• RSM module - each interface has its own IP
  address. Each interface assigned necessary
  access lists

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Addressing Scheme

• Class A address to be obtained from ISP for the
  WAN 30.40.32.0
• Multiple subnets such as
• subnet for the cisco switches
• subnet for administrators
• subnet for each classroom
• Additional subnets to be added as needed for
  growth

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Servers

• DNS
• Email
• Admin
• Application
• Library
• Webserver
• DHCP

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Servers (Cont)

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

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Security

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

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Router Configuration

• Design layout

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Justifications

• Cisco 2924 24-port switch located in each room.
  Each port has its on bandwidth and is its own
  collision domain.
• Cisco 2924 24-port switch located in the IDF room
  with a purchased fiber module to run between IDF
  and MDF.
• A Cisco 6509 switch located in the MDF.
  Accommodates a lot of room for growth.

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Justifications (cont.)

• Switching will be used to provide segmentation
• Fragment Free switching selected to reduce
  latency
• 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

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Justifications (Cont.)

• Access Lists are used to control the traffic as
  necessary between the LAN segments
• Fiber used between MDF and IDF to provide secure
  100 mbps for the backbone

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Justification (cont.)

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

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Analysis

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