Network Design

Network Design

1. Hierachal Networks

   • The Need to Scale the Network
     • Support critical applications
     • Support converged network traffic
     • Support diverse business needs
     • Provide centralized administrative control
   • Borderless Switched Networks
   • Hierarchy in the Borderless Switched Network
     • Hierarchical
     • Modularity
     • Resiliency
     • Flexibility
     • Three-Tier Model
     • Two-Tier Model
   • Access, Distribution, and Core Layer Functions
     • Access Layer
       • Represents the network edge
     • Distribution Layer
       • Aggregating large-scale wiring closet networks
       • Aggregating Layer 2 broadcast domains and Layer 3 routing boundaries
       • Providing intelligent switching, routing, and network access policy functions to access the rest of the network
     • Core Layer
       • Is the network backbone.
   • Role of Switched Networks
     • Allows additional flexibility, traffic management, quality of service, and security.

2. Scalable Networks

   • Design for Scalability
     • Redundant Links
     • Multiple Links
     • Scalable Routing Protocol
     • Wireless Connectivity
   • Plan for Redundancy
   • Reduce Failure Domain Size
     • Edge Router
     • AP1
     • S1
     • S2
     • S3
   • Increase Bandwidth
     • Link aggregation Etherchannel
   • Expand the Access Layer
   • Tune Routing Protocols
     • OSPF

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
     • Cisco Catalyst 3850 Switches
     • Catalyst 9400 Switch
   • Forwarding Rates
   • Power over Ethernet
     • Switch
     • IP Phone
     • WAP
     • Cisco Catalyst 2960-C
   • Multilayer Switching
   • Business Considerations for Switch Selection
     • Cost
     • Port density
     • Power
     • Reliability
     • Port speed
     • Frame buffers
     • Scalability

4. Router Hardware

   • Router Requirements
     • Provide broadcast containment by limiting broadcasts to the local network
     • Interconnect geographically separated locations
     • Group users logically by application or department within a company
     • Provide enhanced security by filtering unwanted traffic through access control lists
   • Cisco Routers
     • Branch Routers
     • Network Edge Routers
     • Service Provider Routers
     • Industrial
   • Router Form Factors
     • 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