Module 1- INN, SONA and the ECNM doc

 Define IIN and Cisco SONA frameworks  Describe the Cisco Enterprise Architecture and how it maps to the traditional three-layer hierarchical network model  Describe the devices in a

BSCI Module 1 Lesson 1 - INN, SONA and the ECNM

 Define IIN and Cisco SONA frameworks

 Describe the Cisco Enterprise Architecture and how it maps to the

traditional three-layer hierarchical network model

 Describe the devices in a nonhierarchical network

 Identify problems that can occur in a nonhierarchical switched

network

 Identify problems that can occur in a nonhierarchical routed

network

 Define multilayer switches in a nonhierarchical network

 List the issues that occur with multilayer switches and VLANs in a

nonhierarchical network

 Describe the Enterprise Composite module, which can be used to

divide the enterprise network into physical, logical, and functional boundaries

 List the benefits of the ECNM

 Describe the Campus Infrastructure module of the ECNM

Technological Revolution Cycles

Intelligent Information Network

 Issue of Enterprise:

–Vital networked resources, applications, and information assets remain largely unlinked, despite a large investment in IT resources

–In fact, it is not uncommon for organizations to have hundreds

of ―siloed‖ applications and databases that cannot communicate with each other

 For example, sales applications and databases cannot be

accessed easily by customer service or purchasing departments without creating different overlay networks that join applications and information

 The result is an inability to share information efficiently across the

organization

 Integrating intelligence into the network involves aligning network

and business requirements To accommodate today’s and tomorrow’s network requirements, the Cisco vision of the future includes the Intelligent Information Network (IIN), a strategy that addresses how the network is integrated with businesses

Intelligent Information Network features:

 Integration of networked resources and information assets

that have been largely unlinked: The modern converged

networks with integrated voice, video, and data require that IT departments (and other departments traditionally responsible for other technologies) more closely link the IT infrastructure with the network

 Intelligence across multiple products and infrastructure

layers: The intelligence built in to each component of the network

is extended networkwide and applies end-to-end

 Active participation of the network in the delivery of services

and applications: With added intelligence, it is possible for the

network to actively manage, monitor, and optimize service and application delivery across the entire IT environment

BUILDING AN INTELLIGENT NETWORK

 The Intelligent Information Network distinguishes Cisco

architecturally from its competitors This technology vision offers

an evolutionary approach that consists of three phases in which functionality can be added to the infrastructure as required:

–Everything—data, voice, and video—consolidates onto an IP network for secure network convergence

–By integrating data, voice, and video transport onto a single, standards-based, modular network, organizations can simplify network management and generate enterprisewide efficiencies

– Network convergence also lays the foundation for a new class

of IP-enabled applications delivered through Cisco IP Communications solutions

BUILDING AN INTELLIGENT NETWORK

– Once the network infrastructure has been converged, IT resources can be pooled and shared or ―virtualized‖ to flexibly address the changing needs of the organization

–Integrated services help to unify common elements such as storage and data center server capacity

–By extending virtualization capabilities to encompass server, storage, and network elements, an organization can

transparently use all of its resources more efficiently

BUILDING AN INTELLIGENT NETWORK

–With Application-Oriented Networking (AON) technology, Cisco has entered Phase 3 of building the Intelligent Information Network

–This phase focuses on making the network ―application aware‖

so it can optimize application performance and more efficiently deliver networked applications to users

–In addition to capabilities such as content caching, load balancing, and application-level security, Cisco AON makes it possible for the network to simplify the application infrastructure

by integrating intelligent application message handling, optimization, and security into the existing network

BUILDING AN INTELLIGENT NETWORK

Cisco SONA Framework

 The Cisco SONA is an architectural framework that

illustrates how to build integrated systems and guides the evolution of enterprises toward more intelligent networks.

 Using the SONA framework, enterprises can improve

flexibility and increase efficiency by optimizing applications, business processes, and resources to enable IT to have a greater effect on business

 The SONA framework leverages the extensive

product-line services, proven architectures, and experience of Cisco and its partners to help enterprises achieve their business goals

business processes that

are delivered through the

Infrastructure Services

 Infrastructure services add intelligence to the network infrastructure,

supporting application awareness within the network Network applications such as IP telephony support the entire enterprise network environment from the teleworker to the campus to the data center.

 By implementing network infrastructure services, the overall network

environment is capable of providing support for the most persistent application requirements including security, high availability, reliability, flexibility, responsiveness, and compliancy

 Example infrastructure services that provide the interface between classic

network functions and applications environments include:

– Identity services – Mobility services – Storage services – Compute services – Security services – Voice services

Example: Voice services

 For example, implementing voice services requires features such

as quality of service (QoS) and security

Application Layer

 The SONA application layer includes collaborative

applications that support the enterprise:

–Unified messaging

–Cisco Unified Contact Center

–IP phone

–Cisco Unified MeetingPlace

–Video delivery and conferencing

Cisco Enterprise Architecture

Cisco Enterprise Architecture - Campus

 Combines a core infrastructure of intelligent switching and routing

with tightly integrated productivity-enhancing technologies, including IP Communications, mobility, and advanced security

 Resilient multilayer design, redundant hardware and software

features, and automatic procedures for reconfiguring network paths when failures occur

 Multicast, QoS, Security, Ipsec VPN, MPLS VPN, 802.1x, VLAN

Cisco Enterprise Architecture – Data Center

 A cohesive, adaptive network architecture that supports the

requirements for consolidation, business continuance, and security while enabling emerging SOAs, virtualization, and on-demand

computing

 Easily provide departmental staff, suppliers, or customers with

secure access to applications and resources

 Allows enterprises to extend head-office applications and services,

such as security, IP Communications, and advanced application performance, to thousands of remote locations and users, or to a small group of branches

 Advanced network routing, VPNs, redundant WAN links,

application content caching, and local IP telephony call processing provide a robust architecture with high levels of resilience for all the branch offices

Cisco Enterprise Architecture - Branch

 Allows enterprises to securely deliver voice and data services to

remote small or home offices over a standard broadband access

service, providing a business resiliency solution for the enterprise and a flexible work environment for employees

 Staff can securely log into the network over an ―always-on‖ VPN

and gain access to authorized applications and services from a single cost-effective platform

Cisco Enterprise Architecture - Teleworker

Nonhierarchical Network Devices

 Large collision domain

 Large broadcast

domain

 High latency

 Difficult to troubleshoot

 No traffic between VLANs

 Servers not centrally located

Layer 2 Switching

 Hardware-based bridging

 Wire-speed performance

 Collision domain per port

 Traffic containment based

on MAC address

 High per-port cost

 Layer 3 processing required

 High latency over Layer 2 switching

Issues with Multilayer Switches

in a Nonhierarchical Network

 Single point of failure

for Layers 2 and Layers 3

Cisco Hierarchical Network Model

Hierarchical Campus Model

Hierarchical WAN Model

Functional Areas

Enterprise Composite Network Model

-ECNM

Modules in the Enterprise Campus

Enterprise Campus Infrastructure

Access layer switches

 An access layer switch should provide this functionality with low cost

and high port density

– Catalyst 2950 series

– Catalyst 2960 series

– Catalyst 2960 series

– Catalyst Express 500 series

– Catalyst Express 520 series

Catalyst Express 500 series Catalyst Express 520 series

Enterprise Campus Infrastructure

 Distribution Layer

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Distribution Layer

 The purpose of this layer is to provide a boundary definition in which packet manipulation can take place

 Networks are segmented into broadcast domains by this layer

 Policies can be applied and access control lists can filter packets

 The distribution layer also prevents problems from affecting the core layer

 Switches in this layer operate at Layer 2 and Layer 3

 The distribution layer includes several functions such as the following:

–Aggregation of the wiring closet connections –Broadcast/multicast domain definition

–Virtual LAN (VLAN) routing –Any media transitions that need to occur

Distribution layer switches

 Distribution layer switches are the aggregation points for multiple access layer

switches

 The switch must be able to accommodate the total amount of traffic from the

access layer devices.

 The distribution layer combines VLAN traffic and is a focal point for policy

decisions about traffic flow

 For these reasons distribution layer switches operate at both Layer 2 and

Layer 3

 The following Cisco switches are suitable for the distribution layer:

– Catalyst 3550/3560 series

Enterprise Campus Infrastructure

 Core Layer

Core Layer

 The core layer is a high-speed switching backbone

 If they do not have an associated router module, an external router is

used for the Layer 3 function

 This layer of the network design should not perform any packet

manipulation

 Packet manipulation, such as access list filtering, would slow down the switching of packets

Core Layer Switches

 In a network design, the core layer can be a routed, or Layer 3, core

 Core layer switches are designed to provide efficient Layer 3 functionality when needed

 Factors such as need, cost, and performance should be considered before a

choice is made.

 The following Cisco switches are suitable for the core layer:

– Catalyst 4500 and 4500-E series – Catalyst 6500 and 6500-E series

Campus Infrastructure Module

 Research case studies to see how enterprises are

making use of the SONA architecture.

 Navigate to www.cisco.com and search on ―SONA

Case Studies‖.

 From the SONA homepage, find the link for case

studies.

 Select one of the case studies to read about an

application of the SONA approach.

Self Check

1 Name the 3 layers of the SONA Framework.

2 What are the 3 phases in building an Intelligent

Information Network?

3 What are the main issues with non-hierarchical

network devices?

4 How is the hierarchical model divided?

5 What are the 3 functional areas in the Enterprise

Composite Model?

 The SONA framework guides the evolution of the

enterprise network towards 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.

 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

Q and A

 Cisco Service-Oriented Network Architecture

–http://cisco.com/en/US/partner/netsol/ns629/networking_solutions_market_segment_solutions_home.html

 Cisco Intelligent Information Network

–http://cisco.com/en/US/partner/netsol/ns650/networking_solutions_market_segment_solution.html