Need help with all of these questions 7. Describe the main role of the communict

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Need help with all of these questions

7. Describe the main role of the communictaion layer, the network-wide state- management layer, and the network-control application layer in an SDN controller Solution 8. Suppose you want to implement a new routing protocol in the SDN control plane. At which layer would you implement the protocol? Explain Solution 9. What are the purposes of the SNMP GetRequest and SetRequest mesages? Solution 10. Define the following terms in the context of SNMP: managing server, managed device, network management agent, and MIB n Base Solution

Explanation / Answer

7)Answer:

The Management Plane handles functions such device management, firmware updates, SNMP and external configuration via the CLI. The Data Plane refers to packet and frame forwarding through the device. The Control Plane is routing protocols such as BGP & OSPF and switching protocols such as STP & TRILL. The control plane will use the routing table to build the forwarding table used by data plane. The forwarding table is delivered to the data plane by the management plane as part of the device operating system. Thus when an Ethernet frame arrives on the switch interface, the data plane then forwards it to output port.

Communication Layer: In a controller, this layer provides communication between the SDN controller and controlled switches.

Network-wide state management layer: This layer acts as a set of network links, switches, and services.

Network-control application layer: This layer provides API and abstractions for network control apps.

8)Answer:

Routing would occur in the management layer. The management layer is the one that interacts with SNMP, SSH, Telnet, and TFTP.

9)Answer:

SetRequest, value is applied to the specified OID of the SNMP agent. GetRequest, value is a Null that acts as a placeholder for the return data.

10)Answer:

Managed device: a piece of network equipment that is under the control of the managing entity.

3.Management agent: a software process running on a managed device that communicated with the managing entity and takes action on the managed device under the control of the managing entity.

4.MIB: pieces of information associated with all of the managed objects in a device.5.Network management protocol: runs between the managing entity of the management agents on the managed devices, allowing the agents to alert the managing entity to potential problems, and allowing the managing entity to send commands to the management agents

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