Different services in modular network design. On the other hands cisco enterprise composite network model provides a functional modular approach to network design. Network devices downstream of the distribution switches are part of the distribution block. Modules make the network scalable understandable stable and simpler to troubleshoot. Application networking services in a modular network design traditional networks handled static web pages e mail and routine clientserver traffic.
In modular network modules are used to organize server farms network management campus networks wans and the internet. As a result network changes and upgrades can be performed in a controlled and staged manner allowing greater stability and flexibility in the maintenance and operation of the campus network. Figure 3 3 depicts a typical campus network along with the different functional modules as part of the modular enterprise architecture design. One advantage of this design is isolation.
You can design the most redundant physical network in the world but if its not properly configured to provide layer 3 ip default gateway redundancy and a failure occurs your customers network will grind to a screeching halt and you can be sure they will call you to ask why. Modular design is a design approach that creates things out of independent parts with standard interfaces. This allows designs to be customized upgraded repaired and for parts to be reuseda well know example of module design are lego plastic construction toys. Internet service provider isp module public switched telephone network pstn module frame relayatm module.
This section expands on the cisco service oriented network architecture sona framework described in chapter 2 and explores the six modules of the cisco enterprise architecture with an emphasis on the network infrastructure design considerations. Using a modular approach to network design.