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WASHINGTON SCHOOL PROJECT

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  1. SAMPLE SAMPLE SAMPLE SAMPLE SAMPLE WASHINGTON SCHOOLPROJECT WAN DESIGN PROPOSAL This is a sample project completed by previous students. You may look at this, but in NO way copy or use any part in any way.

  2. WAN Requirements • Washington School District • Connect all school and administrative offices with the district office • Reliable • Scalable • Optimize bandwidth • Minimize cost

  3. TWO – LAYER HIERARCHICAL MODEL • Hierarchical • Method for controlling data traffic patterns • Two – layer design • Three regional hubs • Fast WAN core

  4. TWO-LAYER HIERARCHICAL

  5. DATA TRAFFIC FLOW • Controlling traffic flow with layer 3 • Router path determination • Layer 3 addressing • Flows up hierarchy only as far as it needs • Conserves bandwidth

  6. WAN TRAFFIC FLOW

  7. WAN CORE • Fast WAN Core • Each Regional hub connected via 4 T1 lines • School locations connected to closest Regional Hub with T1 line • Access to Internet • Thru District Office • Double Firewall • Frame Relay WAN link • No other connections

  8. WAN CORE

  9. WAN Equipment • Hub routers • Cisco 7576 • Multiprotocol • Router A – slots 0 thru 5 • Router B – slots 8 thru 12 • Dual power possible • Console port • Auxiliary port for DSU/CSU • 500,000- to 1,000,000 packets per second

  10. Hub Routers – front view

  11. Hub Routers – rear view

  12. Quantity Part Number Product Description Price Total 3 CISCO7513/4 Cisco 7513 13-Slot, Dual Bus, 1RSP4, 1 PS 28581 8574300 VIP2 Port and Service Adapters 18 PA-4T+ 4 Port Serial Port Adapter, Enhanced 4781 8605800  Total: 17180100 Hub Routers

  13. School Location Routers • Cisco 2651 • 37,000 packets per second • Expandable for scalability • Port options • Serial – asynch or synch • ISDN PRI or BRI • T1/E1 connections • ethernet • Multiprotocol • modular

  14. Quantity Product Description Price Total 33 Cisco 2651 Router 334500 11038500  Total: 11038500 School Location Routers

  15. CSU/DSU • Channel Service Unit/Data Service Unit • Like high powered modem • Both ends of T – 1 connection • 24 for 4 T-1 lines from each hub router • 64 for T-1 lines to each school • 1 for Frame relay connection

  16. CSU/DSU

  17. WAN CORE

  18. Quantity Product Description Price Total 91 Adtran, inc DSU TSP 1345 122395  Total: 122395 CSU/DSU COST

  19. Quantity Product Description Price Total 36 US ROBOTICS 56K/14.4K V.92 W/RAPIDCOMM FAX/DATA SW 7500 270000  Total: 270000 Modems • For dial backup

  20. Quantity Product Description Price Total 1 CISCOADVANTAGE FIREWALL PIX 525 UNRESTRICTED BUNDLEPIX-525-UR-BUN 15957 1595700 Cisco Secure PIX Firewall 525 • Tracks source and destination addresses • TCP sequence numbers, port numbers, and additional TCP flags

  21. Total WAN Equipment Price • $ 302,066.95

  22. PPP • WAN data link –layer protocol • Encapsulate datagrams • Link Control Protocol • Establishing, configuring, testing data-link connection • Network Control Protocols • Establishing and configuring network – layer protocols

  23. PPP Session Establishment • Link establishment • Link quality determination(optional) • Authentication – CHAP • Repeated after link established • Network – layer protocol configuration negotiation • Link termination

  24. Sample CHAP Configuration District_Office> District_Office > enable District_Office# config t District_Office(config)# username Shaw_Butte password “password” District_Office(config)# interface s0/0 District_Office(config-if)# encap PPP District_Office(config-if)# PPP authentication CHAP District_Office(config-if)# exit District_Office(config)# exit District_Office# exit District_Office>

  25. PPP

  26. IGRP Routing Protocol • Distance-Vector Interior Routing Protocol • Each router sends all or a portion of its routing table in a routing update message at regular intervals to each of its neighboring routers. • IGRP uses a combination Network delay, bandwidth, reliability, and load for its metrics. • Allows for various metric settings in networks with widely varying performance characteristics.

  27. IGRP Setup As an example: The IGRP Setup for the District office is: District_Office(config)# router igrp 109District_Office(config-router)# network 10.0.0.0

  28. Routing Updates • Network Updates will be sent according to the • default setting of 90 seconds • Will flow from the school sites to the closest regional hub and then flow from the WAN core regional hub to the District Office

  29. COMMUNITY ELEMENTARY SCHOOL • Remote location • Infrequent need for connectivity • ISDN BRI connection to WAN core • Usable bandwidth 128 kbps • DDR establishes and releases circuit • Connected via Shaw Butte Hub • Reduced cost

  30. COMMUNITY SCHOOL

  31. Frame Relay

  32. Frame Relay • Internet connection • Virtual circuit over point to point connection • CIR 1.54 mbps • HDLC encapsulation • Cost benefits over T1 • Speed - no error checking • DLCI # for virtual circuit from Provider • LMI type for Cisco IOS 11.1 and earlier from Provider

  33. IP Addressing - WAN Core IP Address: 10.0.0.0 Subnet Mask: 255.255.255.0 Masked Bits: 24 Host Bits: 8 Number of Subnets: 65536 Hosts per Subnet: 254

  34. IP Addressing - LAN IP Address: 172.16.0.0 Subnet Mask: 255.255.254.0 Masked Bits: 23 Host Bits: 9 Number of Subnets: 128 Hosts per Subnet: 510

  35. IP Addressing Scheme

  36. Private Addressing • Unregistered address ranges • Unusable on public domain • CLASS A: 10.0.0.0 thru 10.255.255.255 • CLASS B: 172.16.0.0 thru 172.31.255.255 • CLASS C: 192.168.0.0 thru 192.168.255.255

  37. NAT • On Firewall NAT enabled and configured one valid registered IP address • Translation Table • Maps addresses to port numbers • PAT - Port Address Translation or overloading • Static versus Dynamic

  38. NAT and PAT

  39. NAT

  40. NAT and PAT • Benefits • Administration • Server • Increasing ranges • Security • No external initiated traffic • Web services • No knowledge of Company • Cost • Cox

  41. NAT

  42. Server Placement • DNS hierarchical • Master Server on backbone • Regional hubs • School locations • EMAIL on Master Server and School Locations • WEB Server on backbone

  43. Server Placement

  44. Connectivity Backup • Out-of Band Network Management • Auxiliary port with attached Modem • Asynchronous dial in • Set aux password • line aux 0 • Password cisco • Modem autohangup

  45. Connectivity Backup