Network Desing

Network Desing

1. Hierarchical Networks

   • The Need to Scale the Network
     • The ability to access the internet and the corporate network
     • These next-generation networks must not only
     • Businesses increasingly rely on their network
     • support the exchange of various types of network traffi
   • Borderless Switched Networks
     • the network must be developed with an architectural approach
     • The Cisco Borderless Network provides the framework to unify wired and wireless access
     • two primary sets of services: network services, and user and endpoint services
   • Hierarchy in the Borderless Switched Network
     • Hierarchical
     • Modularity
     • Resiliency
     • Flexibility
   • Access, Distribution, and Core Layer Functions
     • Access Layer
     • Distribution Layer
     • Core Layer
   • Role of Switched Networks
     • Flat Layer 2 switched networks relied on the Ethernet and the widespread
     • A switched LAN allows additional flexibility

2. Scalable Networks

   • Design for Scalability
     • Use expandable, modular equipment
     • Design a hierarchical network to include modules
     • Create an IPv4 and IPv6 address strategy that is hierarchical
     • Choose routers or multilayer switches to limit broadcasts
   • Plan for Redundancy
     • Redundancy is an important part of network design
     • One method of implementing redundancy
     • STP eliminates Layer 2 loops when redundant links are used between switches
     • Using Layer 3 in the backbone is another way to implement redundancy
   • Reduce Failure Domain Size
     • The function of the device that initially
     • The use of redundant links and reliable enterprise-class equipment minimize the chance of disruption in a network.
     • Limiting the Size of Failure Domains
     • Switch Block Deployment
   • Increase Bandwidth
     • EtherChannel uses the existing switch ports
     • instead of on each individual port
   • Expand the Access Layer
     • The network must be designed to be able to expand network
     • To communicate wirelessly, end devices require a wireless

3. Switch Hardware

   • Switch Platforms
     • Campus LAN Switches
     • Cloud-Managed Switches
     • Data Center Switches
     • Service Provider Switches
     • Virtual Networking
   • Switch Form Factors
     • Fixed configuration switches
     • Modular configuration switches
     • Stackable configuration switches
     • Thickness
   • Port Density
     • The port density of a switch refers to the number of ports available on a single switch
     • The network designer must also consider the issue of uplink bottlenecks
   • Forwarding Rates
     • Forwarding rates define the processing capabilities
     • Fortunately, access layer switches typically do not need to operate at full wire speed
   • Power over Ethernet
     • Switch
     • IP Phone
     • WAP
     • Cisco Catalyst 2960-C
   • Multilayer Switching
     • When switches were first used in networks, none of them supported routing

4. Router Hardware

   • Router Requirements
     • They provide broadcast containment by limiting broadcasts
     • They interconnect geographically separated locations.
     • hey group users logically by application or department within a company
   • Cisco Routers
     • Branch Routers
     • Network Edge Routers
     • Service Provider Routers
     • Industrial
   • Router Form Factors
     • Cisco 800 Industrial Integrated Services Router
     • ASR 9000 and 1000 Series 5500 Series Cisco 800 Cisco 900 Series
     • Cisco ASR 9000 and 1000 Series Aggregation Services Routers
     • Cisco Network Convergence System 5500 Series Routers
     • Cisco 800 Industrial Integrated Services Router