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Network Requirements

Network Requirements. Introducing Campus Networks. Intelligent Information Network. Intelligent Information Network (IIN) integrates networked resources and information assets. IIN extends intelligence across multiple products and infrastructure layers.

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Network Requirements

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  1. Network Requirements Introducing Campus Networks

  2. Intelligent Information Network • Intelligent Information Network (IIN) integrates networked resources and information assets. • IIN extends intelligence across multiple products and infrastructure layers. • IIN actively participates in the delivery of services and applications. • Three phases in building an IIN are: • Integrated transport • Integrated services • Integrated applications

  3. Cisco SONA Framework • The Cisco Service-Oriented Network Architecture (SONA) is an architectural framework. • SONA brings several advantages to enterprises: • Outlines how enterprises can evolve toward the IIN • Illustrates how to build integrated systems across a fully converged intelligent network • Improves flexibility and increases efficiency

  4. Cisco SONA Framework Layers

  5. Cisco Enterprise Architecture

  6. Nonhierarchical Network Devices • Large collision domain • Large broadcast domain • High latency • Difficult to troubleshoot

  7. Layer 2 Switching • Hardware-based bridging • Wire-speed performance • Collision domain per port • Traffic containment based on MAC address Issues • No traffic between VLANs • Unbounded broadcast domain • Servers not centrally located

  8. Layer 3 Routing • Single broadcast domain per interface • ACLs can be applied between segments Issues • High per-port cost • Layer 3 processing required • High latency over Layer 2 switching

  9. Multilayer Switching • Combined functionality • Layer 2 switching • Layer 3 switching • Layer 4 switching • Low latency • High-speed scalability

  10. Issues with Multilayer Switchesin a Nonhierarchical Network • Single point of failure for Layer 2 and Layer 3 • Underutilization of hardware • Spanning tree complexity • Servers not centrally located

  11. Hierarchical Campus Model

  12. ECNM Functional Areas

  13. Enterprise Composite Network Model

  14. Modules in the Enterprise Campus

  15. Campus Infrastructure Module

  16. Switch Configuration Interfaces • Two interfaces are used to configure Cisco Catalyst switches: • Cisco Catalyst software • Cisco IOS • Cisco Catalyst software was traditionally used to configure Layer 2 parameters on the modular switches: • Cisco Catalyst 4000, 5500, 6500 Series • These switches now support Cisco IOS (native IOS) • Cisco IOS software is standard for most other switches and for Layer 3 configuration on the modular switches.

  17. Cisco Catalyst Software • Cisco Catalyst software is used to configure Layer 2 parameters. • Cisco Catalyst software configuration commands are prefaced with the keyword set. • Console(enable) set port enable 3/5 • Layer 3 configuration is implemented on MSFC with the Cisco IOS interface. • Some platforms can now use the Cisco IOS interface to configure both Layer 2 and Layer 3 (native IOS). Cisco Catalyst 4000, 5500, and 6500 switches

  18. Cisco IOS Interface • On most Catalyst switches, Cisco IOS interface is standard for • Layer 2 configuration • Layer 3 configuration on multilayer switch

  19. Summary • The SONA framework guides the evolution of the enterprise network toward IIN. • Cisco enterprise architecture with a hierarchical network model facilitates the deployment of converged networks. • Nonhierarchical network designs do not scale and do not provide the required security necessary in a modern topology. • Layer 2 networks do not provide adequate security or hierarchical networking. • Router-based networks provide greater security and hierarchical networking; however, they can introduce latency issues.

  20. Summary (Cont.) • Multilayer switches combine both Layer 2 and Layer 3 functionality to support the modern campus network topology. • Multilayer switches can be used in nonhierarchical networks; however, they will not perform at the optimal level. • The enterprise composite model identifies the key components and logical design for a modern topology. • Implementation of an ECNM provides a secure, robust network with high availability. • The Campus infrastructure, as part of an ECNM, provides additional security and high availability at all levels of the campus. • The two Cisco Catalyst switch interfaces have different features and different font.

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