Questions and Answers
What is the main limitation of traditional networking compared to self-driving cars?
What is the primary goal of Software Defined Networking?
What is the data plane in Software Defined Networking?
What is the key benefit of applying the concept of self-driving cars to networking?
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What is the main difference between traditional networking and Software Defined Networking?
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What is the primary advantage of Software Defined Networking in large environments?
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What is the equivalent of a self-driving car in Software Defined Networking?
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What is the key concept behind Software Defined Networking?
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What is the primary function of the management plane in a network?
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Which plane is responsible for making decisions about how to forward traffic in a network?
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What is the primary goal of Software Defined Networking (SDN)?
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What is the role of a controller in Software Defined Networking?
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What is the term used to describe the process of configuring and managing network devices?
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In Software Defined Networking, what is the term used to describe the instructions given to the controller?
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What is the primary difference between the traditional network management approach and Software Defined Networking?
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Which of the following is an example of the control plane in action?
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What is the term used to describe the movement of data in a network?
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What is the primary benefit of using a controller in Software Defined Networking?
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What is the primary function of the controller in a Software Defined Network?
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What is the role of vSmart in Cisco's SDWAN solution?
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What is the main benefit of Software Defined Networking in terms of device management?
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What is the function of vBond in Cisco's SDWAN solution?
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What is the primary goal of Software Defined Networking in terms of network management?
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What is the role of the controller network in Cisco's SDWAN solution?
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What is the term for the way computers or programs talk to each other?
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What is the main difference between traditional networking and Software Defined Networking?
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What is the benefit of Software Defined Networking in terms of device deployment?
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What is the role of vManage in Cisco's SDWAN solution?
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What is the primary function of a controller in Software Defined Networking?
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What is the main advantage of using Software Defined Networking?
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What is a major limitation of implementing Software Defined Networking?
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What is an example of the controller concept in Software Defined Networking?
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What is the name given to the concept of working with a controller to specify what you want and having the controller carry out that intent across the network?
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Without Software Defined Networking, what would be difficult to manage when moving a computer around?
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What is the benefit of having a controller in Software Defined Networking?
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What is the primary goal of Software Defined Networking?
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Study Notes
Software Defined Networking (SDN)
Goal: to simplify network management and configuration, inspired by self-driving cars
Concept: specify intent to a controller, which then implements and configures network devices
Benefits: easier operations, maintenance, and deployment, reduced need for manual configuration
Yes, you are correct. Not all networking equipment is inherently compatible with Software Defined Networking (SDN). Traditional network devices often use fixed, closed protocols and do not provide the programmability or level of abstraction required for SDN. For a network to be SDN-compatible, the devices typically need to support open standards such as OpenFlow or have programmable interfaces that can interact with an SDN controller. This may involve upgrading existing hardware, using SDN-enabled devices, or implementing software overlays to enable SDN functionalities in legacy environments.
Data, Management, and Control Planes
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Data Plane: actual movement of data across the network, includes packets and devices involved in the path (routers, switches, etc.)
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Management Plane: process of communicating with and configuring network devices, performed by administrators
Control Plane: sorting out how to forward traffic, deciding which path to take, and informing devices of decisions
The Management Plane and the Control Plane serve distinct functions in network architecture.
The Management Plane focuses on the administrative aspects of the network. It involves tasks performed by network administrators, such as communicating with and configuring network devices. This plane allows for the management and monitoring of the network's overall health, performance, and configuration settings. Tools like command-line interfaces (CLI), Simple Network Management Protocol (SNMP), and various network management systems are typically used within the Management Plane to execute these tasks.
On the other hand, the Control Plane is responsible for the network's decision-making processes. It determines how to forward traffic through the network by deciding the optimal paths and routes for data to travel. The Control Plane's responsibilities include creating and maintaining routing tables, managing topology information, and disseminating policy decisions to network devices. Protocols such as Open Shortest Path First (OSPF), Border Gateway Protocol (BGP), and Intermediate System to Intermediate System (IS-IS) operate within this plane to ensure effective and efficient data tra nsmission.
In essence, the Management Plane handles configuration and oversight by human administrators, while the Control Plane handles automated decision-making processes to forward data through the network.
SDN in Action
- Controller: device or software that takes instructions from administrators and configures network devices
- APIs: Application Programming Interfaces are software structures that allow different applications, systems, and services to communicate and exchange information with each other, enabling controllers to interact with network devices in a standardized way.
- vManage: component of Cisco's SDWAN solution, used to specify intent (e.g., tunnels and overlays)
- vSmart: component of Cisco's SDWAN solution, rains down configurations to edge devices
- vBond: component of Cisco's SDWAN solution, authenticates and links devices to vSmart
Intent-Based Networking
- Intent: specify what you want to happen on the network (e.g., access to specific servers)
- Controller: carries out and implements intent across the network
- Benefits: easier to manage and maintain network, reduced complexity
Wireless Access Points
- Controller Concept: used to manage multiple access points, ensuring coordinated frequencies and delivering intended Wi-Fi access
- Benefits: simplified management, reduced overlapping frequencies
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Description
Learn about Software Defined Networking, a technology that simplifies network management and configuration. Understand the data, management, and control planes, and how SDN benefits operations, maintenance, and deployment.
