Intelligent Information Network and Service-Oriented Network Architecture CCNA Training in Gurgaon

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Cisco has developed a strategy to address the increasing demands placed on today's networks. Beyond just basic connectivity, the network plays a crucial role because it touches many components of the infrastructure: end users, servers, middleware, and applications. As demands for networks grow, the network can become complex and difficult to scale and manage. Many applications are not visible to network managers on a limited scale, hampering capacity planning and service performance. Furthermore, the network must be able to respond quickly to denial-of-service (DoS) attacks, viruses, and other security-related events that hamper productivity. Drivers for new network architectures are summarized with

• Application growth
• IT evolution from basic connectivity to intelligent systems
• Increased business expectations from networks

The Cisco IIN framework and SONA make it possible to better align IT resources with business priorities.

IIN Framework

The IIN framework is a vision and architecture that adds intelligence to a network. It is implemented in a phased approach for integrating the network with applications, middleware, servers, and services. The idea is to have a single integrated system to extend intelligence across multiple layers to more closely link the network with the rest of the IT infrastructure. Adding intelligence to the network lets the network actively participate in the delivery of services and applications. IIN defines the evolving role of the network in facilitating the integration of the network with services and applications to better align IT resources with business priorities. It lets organizations quickly adapt to the IT environment and respond to changing business requirements. An IIN's capabilities are as follows:

• An integrated system— The network is integrated with applications, middleware, and services.
• Active participation— Allows the network to manage, monitor, and optimize application and services delivery.
• Policy enforcement— The network enforces policies linking business processes to network rules.

IIN has an evolutionary approach that consists of three phases—Integrated Transport, Integrated Service, and Integrated Application. The goal is for the enterprise to migrate to an intelligent information network.

Integrated Transport involves the convergence of voice, data, and video into a single transport network. The use of Cisco's Unified communications platforms allows the deployment of new applications that enhance communications. Unified messaging is one example of an application where a user can check messages from the IP phone or via email in text or as a voice recording.

Integrated Service merges common elements such as storage and data center server capacity. Virtualization technologies allow the integration of servers, storage, and network elements. With the virtualization of systems with redundant resources, the network can provide services in the event of a local network failure, which enhances business continuity.

The Integrated Application phase allows the network to become application-aware. The network can optimize application performance by integrating application message handling, application optimization, and application security. Cisco calls this technology Application-Oriented Networking (AON).

SONA

SONA is an architectural framework that guides the evolution of enterprise networks to IIN to support new IT strategies. With SONA, distributed applications and services are centrally managed over a common, unified platform. An integrated system allows access to networked applications and services from all locations with greater speed and service quality. Figure 1-1 shows the SONA framework and the offerings included at each layer. SONA networks are based on a three-layer design that incorporates the applications, services, and network. Offerings are contained within each layer:

• Network Infrastructure layer contains the Cisco Enterprise Architecture (campus, LAN, WAN, data center, branch) and facilitates the transport of services across the network. It also includes servers, storage, and clients.
• Interactive Service layer optimizes the communication between applications and services using intelligent network functions such as security, identity, voice, virtualization, and quality of service.
• Application layer contains the business and collaboration applications used by end users, such as enterprise resource planning, procurement, customer relationship, unified messaging, and conferencing.

Figure 1-1. SONA Framework

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Each layer in this framework is covered in the sections that follow.

Network Infrastructure Layer

The Network Infrastructure layer contains the Enterprise Network Architecture, which includes the Enterprise Campus, Enterprise Branch, data center, Enterprise Edge, WAN and LAN, and teleworkers. The Cisco Enterprise Architecture is covered in Chapter 2, "Network Structure Models." Servers, storage networks, and end-user clients reside at this layer.

This layer contains switching and routing elements to enhance performance and capabilities, including reliability and security. The network infrastructure is built with redundancy to provide increased reliability. Security configurations are applied to the infrastructure to enforce security policies.

Interactive Service Layer

This layer supports essential applications and the Network Infrastructure layer. Standardized network foundation and virtualization are used to allow security and voice services to scale better. A standardized network architecture can be duplicated and further copied to scale a network. Services provided at this layer fall into two categories: Infrastructure Services and Application Networking Services.

Infrastructure Services

The six infrastructure services are essential in the operation and optimization of network services and applications:

• Identity services include authentication, authorization, and accounting (AAA); Network Admission Control (NAC); and Network-Based Application Recognition (NBAR).
• Mobility services allow network access regardless of the location. An example is VPN.
• Storage services improve storage of critical data. Critical data must be backed up and stored offsite to allow for business continuity and disaster recovery.
• Compute services improve computing resources enterprise-wide. High-end servers can be used for virtual machines to scale the amount of servers on the network.
• Security services deliver security for all network devices, servers, and users. These services include intrusion detection and prevention devices.
• Voice and collaboration services allow user collaboration through all network resources. Cisco's MeetingPlace is an example of a collaboration application.

Application Networking Services

This tier uses middleware applications and Cisco AON to optimize the delivery of applications. Application services deliver application information, optimize application delivery, manipulate application messages, and provide application security and application-level events. Virtualization technologies in this layer are used to maximize resource usage and provide greater flexibility. Servers with multiple virtual machines maximize the use of hardware resources.

Application Layer

The Application layer includes business applications and collaboration applications. Business applications include

• Product Lifecycle Management (PLM)
• Customer Relationship Management (CRM) applications
• Enterprise Resource Planning (ERP) applications
• Human Capital Management (HCM)
• Procurement applications
• Supply Chain Management (SCM)

Collaboration applications include

• Instant messaging (IM)
• Unified messaging (UM)
• IP Contact Center (IPCC)
• Meeting Place
• Video Delivery

Benefits of SONA

The benefits of SONA are as follows:

• Functionality— SONA supports the enterprise's operational requirements. The network's services meet the requirements of the business.
• Scalability— SONA separates functions into layers, allowing for the growth and expansion of organizational tasks. Modularity and hierarchy allows for network resources to be added to allow growth.
• Availability— SONA provides the services from any location in the enterprise and at any time. The network is built with redundancy and resiliency to prevent network downtime.
• Performance— SONA provides fast response times and throughput, with quality of service per application. The network is configured to maximize the throughput of critical applications.
• Manageability— SONA provides configuration management, performance monitoring, and fault detection. Network management tools are used to detect and correct network faults before applications are affected. Trending tools are used to determine when to add more infrastructure or services to support the increasing demands of applications.
• Efficiency— SONA provides the network services with reasonable operational costs and sensible capital investment. Maximum use of existing resources reduces cost and additional equipment is added only when the application demands increase.