Cisco SONA Layers

Business Applications

Business Applications

Collaboration Applications

Application Networking Services

Infrastructure Services

Network Infrastructure Vlrtuallzation

Campus

Branch

Data Center

WAN/ MAN

Teleworker

Server

Storage

Clients

■ Intelligent Information Network -

■ Intelligent Information Network -

The SONA framework brings forth the notion that the network is the common element that connects and enables all components of the IT infrastructure. The SONA outlines these three layers of the IIN:

■ The networked infrastructure layer: This is where all the IT resources are interconnected across a converged network foundation. The IT resources include servers, storage, and clients. The network infrastructure layer represents how these resources exist in different places in the network, including the campus, branch, data center, WAN, metropolitan-area network (MAN), and teleworker. The objective for customers in this layer is to have anywhere and anytime connectivity.

■ The interactive services layer: This enables efficient allocation of resources to applications and business processes delivered through the networked infrastructure. This layer comprises these services:

— Voice and collaboration services

— Mobility services

— Security and identity services

— Storage services

— Computer services

— Application networking services

— Network infrastructure visualization

— Services management

— Adaptive management services

© 2006 Cisco Systems, Inc.

■ The application layer: This includes business applications and collaboration applications. The objective for customers in this layer is to meet business requirements and achieve efficiencies by leveraging the interactive services layer.

1-8 Implementing Secure Converged Wide Area Networks (ISCW) v1.0 © 2006 Cisco Systems, Inc.

Cisco Network Models

This topic describes Cisco network models in the Cisco Enterprise Architecture and their mapping to a traditional three-layer hierarchical network model.

Cisco provides enterprise-wide systems architecture that helps companies to protect, optimize, and grow their infrastructure to support their business processes. The architecture provides for integration of the entire network—campus, data center, WAN, branches, and teleworkers— offering staff secure access to the tools, processes, and services. The Cisco Enterprise Architecture consists of these elements:

■ Cisco Enterprise Campus Architecture: Combines a core infrastructure of intelligent switching and routing with tightly integrated productivity-enhancing technologies, including Cisco IP Communications, mobility, and advanced security. The architecture provides the enterprise with high availability through a resilient multilayer design, redundant hardware and software features, and automatic procedures for reconfiguring network paths when failures occur. Multicast provides optimized bandwidth consumption, and quality of service (QoS) prevents oversubscription to ensure that real-time traffic, such as voice and video, or critical data is not dropped or delayed. Integrated security protects against and mitigates the impact of worms, viruses, and other attacks on the network—even at the switch port level. Cisco enterprise-wide architecture extends authentication support using standards such as 802.1x and Extensible Authentication Protocol (EAP). It also provides the flexibility to add IPsec and Multiprotocol Label Switching virtual private networks (MPLS VPNs), identity and access management, and VLANs to compartmentalize access. This helps improve performance and security, while also decreasing costs.

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