13.6 Enterprise Networking Flashcards
Describe Software Defined Network (SDN)
allowing the system administrator to control software and configuration of network devices at the edge of the network using open protocols such as OpenFlow.
What are the three planes that Network communications occur
Control plane
Data Plane
Management Plane
Describe the Control Plane
gathers and stores various information about the network.
Describe the Data Plane
is where tasks or activities related to the main processing of packets take place. This plane connects the network ports on a network device. Routers and switches use the information from the control plane to forward incoming traffic out the appropriate egress interface.
Describe the Management Plane
is responsible for accessing and managing a device through the network so it can be configured. This can include using methods such as SSH, Telnet, or HTTPS. The management plane can be thought of as where the network administrator interacts with the network device.
Describe the SDN component Controller
The controller (sometimes called a software-defined network controller) is a software platform that contains several smaller applications, each of which performs some type of control plane functionality
Describe the SDN component Controller Interface
Controllers use two software interfaces to communicate with network devices and applications.
The northbound interface is used by the applications on the controller in order to obtain information about the network. For example, an application that creates a graphical representation of the network topology would use the Northbound interface to obtain this information.
The southbound interface is used to communicate with all of the physical network devices on the network. For example, information about MAC addresses or routing tables are sent and received through this interface.
Describe the SDN Component API
An application program interface (API) is a standardized way for different types of software or technology to communicate with each other. On a controller, the API designates the accepted method of communication between the controller, network devices, and installed applications.
Describe Device-Based SDN
Each network device is programmed by applications running on the device itself or on a networked server.
Describe Controller-Based SDN
Uses a centralized controller. The applications on the controller can communicate with network devices and handle traffic flows.
Describe Policy-Based SDN
Similar to controller-based SDN, where a centralized controller has a view of all devices in the network. A policy-based SDN includes an additional Policy layer that operates at a higher level. It uses built-in applications that automate advanced configuration tasks via a guided workflow and user-friendly GUI. No programming skills are required.
Describe Network diagrams
Physical diagrams show the physical location of every network device. The diagram shows each device, its connections, and how each device is physically connected to others.
Logical diagrams show larger network components such as subnets and VLANs. They show how data flows across the network.
Describe Network device documentation
This documentation contains all up-to-date information on every network device. The following information should be included in this document: OS version IP address MAC address VLAN Port information Any other pertinent information
Describe Network baseline data
Network baseline data is used to establish normal network performance. Establishing a network performance baseline requires collecting performance data from the ports and devices that are essential to network operation. The steps to establish a baseline are:
Determine the type of data that needs to be collected. This can include CPU utilization, bandwidth utilization, etc.
Identify key devices and ports to monitor.
Determine the time limit for the the baseline. This should typically be between two to four weeks.
Describe the Troubleshooting Process
Define the problem Gather Info Analyze info Eliminate probable causes Propose hypothesis Test hypothesis Solve the problem
