1. Introducing Campus Networks
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 Issues 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 Issues 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
Low latency
High-speed scalability

10. Issues with Multilayer Switches in 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.