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Module 11. Network Design. - Coggle Diagram
Module 11. Network Design.
11.1. Hierarchical Networks.
11.1.4 Hierarchy in the
Borderless Switched Network
Borderless switched network
design guidelines are built upon
the following principles:
Modularity
Resiliency
Hierarchical
Flexibility
Three-Tier Model
Two-Tier Model
11.1.5 Access, Distribution,
and Core Layer Functions
Access Layer
The access layer represents the network edge, where traffic enters or exits the campus network. Traditionally, the primary function of an access layer switch is to provide network access to the user.
Distribution Layer
The distribution layer interfaces between the access layer and the core layer to provide many important functions.
Core Layer
The core layer is the network backbone. It connects several layers of the campus network. The core layer serves as the aggregator for all of the distribution layer devices and ties the campus together with the rest of the network.
11.1.3 Borderless Switched Networks
The Cisco Borderless Network provides the framework to unify wired and wireless access, including policy, access control, and performance management across many different device types.
11.1.6 Three-Tier
and Two-Tier Examples
Three-Tier Example
Two-Tier Example
11.1.2 The Need to
Scale the Network
11.1.7 Role of
Switched Networks
11.1.1 Video - Three-Layer
Network Design
11.2. Scalable Networks.
11.2.3 Reduce Failure Domain Size
AP1
S1
Edge Router
S2
S3
11.2.4 Increase Bandwidth
In hierarchical network design, some links between access and distribution switches may need to process a greater amount of traffic than other links.
11.2.2 Plan for Redundancy
11.2.5 Expand the Access Layer
To communicate wirelessly, end devices require a wireless NIC that incorporates a radio transmitter/receiver and the required software driver to make it operational. Additionally, a wireless router or a wireless access point (AP) is required for users to connect.
11.1.7 Role of Switched Networks
Wireless Connectivity
Scalable Routing Protocol
Multiple Links
Redundant Links
11.2.6 Tune Routing Protocols
11.3. Switch Hardware.
11.3.4 Forwarding Rates
Forwarding rates define the processing capabilities of a switch by rating how much data the switch can process per second. Switch product lines are classified by forwarding rates. Entry-level switches have lower forwarding rates than enterprise-level switches.
11.3.5 Power
over Ethernet
Switch
IP Phone
WAP
Cisco Catalyst 2960-C
11.3.3 Port Density
11.3.6 Multilayer Switching
Multilayer switches are typically deployed in the core and distribution layers of an organization's switched network. Multilayer switches are characterized by their ability to build a routing table, support a few routing protocols, and forward IP packets at a rate close to that of Layer 2 forwarding.
11.3.2 Switch Form Factors
Modular configuration switches
Stackable configuration
switches
Fixed configuration switches
Thickness
11.3.7 Business Considerations
for Switch Selection
11.3.1 Switch Platforms
Data Center Switches
Service Provider Switches
Cloud-Managed Switches
Virtual Networking
Campus LAN Switches
11.4. Router Hardware.
11.4.1 Router Requirements
Routers use the network portion (prefix) of the destination IP address to route packets to the proper destination. They select an alternate path if a link goes down. All hosts on a local network specify the IP address of the local router interface in their IP configuration.
11.4.3 Router Form Factors
Cisco ASR 9000 and 1000 Series
Aggregation Services Routers
Cisco Network Convergence
System 5500 Series Routers
Cisco 900 Series
Cisco 800 Industrial
Integrated Services Router
11.4.2 Cisco Routers
Network Edge Routers
Service Provider Routers
Branch Routers
Industrial
