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Design dtd | User Req | Core | Traffic | Electronics | Router cfg | ISDN | CCNA | Summary

Create a WAN design that includes the following:

· Create a WAN User Requirements Document focusing on interconnecting all of the individual school sites into a WAN topology that, meets the needs suggested in the TCS Overview, your research, and your Instructor's assignments

The school site groups should make sure they have enough information to proceed with the design tasks that follow. Resources include the TCS Overview, any stipulations/constraints/hints you as the Instructor (or other networking professionals) have added, the four semesters of curriculum, and the Internet.

· Finish the District WAN logical diagram, as is presented in the TCS overview and was generated for the Semester 3 Case Study deliverables WAN Core Figure and WAN Core IP

· Document WAN link speeds and upgrade paths

· Modems (District Office to Site Router's AUX port): 56 kbps
· T1 Lines (WAN Core Router Mesh; WAN core routers to site routers): 1.544 Mbps
· Frame Relay (WAN Core to Internet Service Provider/Carrier): 1.544 Mbps
· ISDN lines (WAN core routers to site routers, for backup or heavy-traffic conditions): 144 kbps
· Updgrade Paths: Modems to ISDN; T1 to T3; Frame Relay to T3; ISDN to Frame Relay or Fractional T1

· Create a model of traffic flow between schools showing a two- or three-layer WAN hierarchy
See TI 3.3.9, Figure 1; and TI 3.3.10, Figures 1, 2, and 3

· Develop a list of additional equipment, such as CSUs/DSUs (channel service units/data service units) and router interfaces required to implement the district-wide WAN (WAN Electronics List)
See Tables 1 and Table 2

· Describe a list of what kind of redundancy is needed to ensure WAN uptime
· Modem connection: from District Office to each school sites' router AUX port will allow remote configuration and troubleshooting of routers
· ISDN connections between each school site (not just the remote site) and the Core (not required and more expensive, but nice): handles backup for links and heavy-traffic conditions
· T1 Core Connections: are already redundant (4 lines each) and meshed (all 3 core sites connect to the other 2 core sites)
· Frame-Relay to Internet connection: a slow backup would be ISDN; Second, slower Frame Relay (like 56 kbps or multiples of it); third, fractional T1. Depends on cost and reliability of the primary Frame-Relay link.

· Summarize the benefits of your WAN design
Typical PROs: low cost, simplicity, redundancy, high bandwidth, simple cable instatllation, meets and exceeds all User Requirements and TCS Overview, functional, scalable, adaptable, manageable
Typical CONs: high cost, complexity, single points of failure, lower bandwidths, complex cable installation, barely meets or misses User Requirements and TCS Overview

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