SNMP and CMIP

By,

Vishwajit Singh

Srigiri Laxman Srinivas

ISQS 6341, Spring 2000

What is Network Management?

NETWORK MONITORING

NETWORK CONTROL

Network Monitoring

Observing and Analyzing the status and behavior of the

End Systems

Intermediate Systems

Sub-networks

Network Monitoring Architecture

Network Monitoring Information.

Network Monitoring Configurations.

Polling and Event Reporting.

Network Monitoring Information

Static : eg. identification of a port on a router.

Dynamic : eg. transmission of a packet on the network.

Statistical : eg. number of packets transmitted per unit of time by an end system.

Network Monitoring ConfigurationsBased on Client-Server Model.

Monitoring Application Manager Function

Monitoring Agent

Agent Function Managed Objects

Agent Function Managed Objects

CLIENT

SERVER

Polling and Event Reporting

Polling : Manager generates the requests periodically.The initiative is with the manager.

Event Reporting : The initiative is with the agent.

Monitoring Types

Performance Monitoring

Fault Monitoring

Accounting Monitoring

Performance Monitoring

Availability Response Time Accuracy Throughput Utilization

Fault Monitoring

Unobservable Faults : eg.Vendor may not have taken care of.

Partially Observable Faults : eg.Node failure.

Uncertainty in Observation : eg:Lack of response from remote device.

Accounting Monitoring:

Keeping the track of the usage of the network resources by the users.

Network Control

Is concerned with modifying parameters in, and causing actions to be taken by, the end systems, intermediate systems, and subnetworks that make up the configuration to be managed.

Configuration Control

Modification Types:

Database update only

Database update plus resource modification

Database update plus action

SNMP

Simple Network Management Protocol is an Application layer protocol.

Part of the TCP/IP protocol suite.

Basic Components of SNMP:

1. Manager

2. Agent

3. MIB(Management Information Base)

SNMP Management Station SNMP Agent

1 2 3 4 5 SNMP Manager UDP/TCP IP Network dependent protocols

Management Application

1 2 3 4 5 SNMP Agent UDP/TCP IP Network dependent protocols

Managed Resources

SNMP Managed Objects

Network Or Internet

1. GetRequest 2. GetNextRequest 3. SetRequest 4. GetResponse 5. Trap

Management Information Base

Database containing the information about the elements to be managed.

Each resource to be managed is referred as an object.

Network manager monitors the resource by reading the values of the objects and controls the objects by modifying these values.

MIB

Associated with each object in the MIB is an identifier called the OBJECT IDENTIFIER.

Its used for naming the object. It’s a unique identifier for a particular

object type and its value consists of a sequence of numbers.

Ready for a DEMO??????

http://www.rad.com/networks/1998/snmp/snmp.html