Network managementChapter2

Author: J. Richard Burke

Presented by Lin Ming Yuan

IM graduate r92725034

Outline

• Network management enhancement

• Evolution of network management

• History graph

Network management enhancement

• The enhancement of network management includes four major parts:– Fault management– Capacity management– Resource management – Trending management

• Management categories – SLA (service level management) (ref 19,20)– Management by policy (ref 21)

• Management approach]– Web-based approach– Desktop approach

• Management application– Data analysis– Decision making capabilities– Applications depend on protocols and DBs

Outline

• Network management enhancement

• Evolution of network management

• History graph

Evolution of network management

• OSI reference model• SGMP (simple gateway monitoring protocol)

• CMIP (common management information protocol)

• SNMP (simple network management protocol)

• Network management framework

OSI reference model

• Purposes– Remote/automated network management– Protocol architecture/specification/standards

(for coordination and interconnection)

• In 1977, the first ISO model was proposed in ISO standard 7498-1.

SGMP (simple gateway monitoring protocol)

• The goal of SGMP developers was to minimize the complexity of software needed for gateway management and the number of commands to which gateway agents would have to respond.

• Simple commands for network management– Get– Set

• During the development of SGMP, those also continue to design another protocol for ISO model management. This approach is called CMOT (CMIP over TCP/IP) and is contained in the application layer of the ISO protocol stack.

CMIP (common management information protocol)

• CMIP play a similar role to that of SNMP in the TCP/IP protocol stack.– Protocol data unit and maps it to a remote operations

service element (ROSE)– Communication between distributed applications in the

ISO model

• CMIP provides more detailed representation in MIB object and the ability to create objects and inherit from other objects. Also 11 commands are used.

SNMP (simple network management protocol)

• As a result of controversy over the SGMP and CMOT, the initiator IAB (Internet Activities Boards) finally found that CMOT is too difficult to be implemented and was abandoned.

• Then the enhance version of SGMP, called SNMP was developed. Several participated working group complete the SNMP protocol. SNMP also has become the important operational standard for network management of TCP/IP-based network.

• Five command are used to communication and retrieve information

Network management framework

Network management framework