⇒Challenges for Network Management
⊕Fast development and widespread application of network and distributed processing system
√The network and related resources, and the distributed applications have become important increasingly
√NMS and Agent use SNMP to exchange management information. ⊗Network Management Protocol-SNMP. √It is an application layer protocol based on TCP/IP network, and is used to exchange the network management information between network management station and the managed devices-SNMPv2 can be used on multiple transmission protocols such as IPX. . Management protocol and interface: CLI,Telnet,SNMP V1/V2C/V3, MIBII. ZTE C300 GPON EPON OLT,C300,ZTE C300, ZTE C300 picture, ZTE C300 pic, ZTE C300 photo.
−For instance: Clearcase, Notes, Mail
−Robust, with 7X24 hours services
√The network is complicated increasingly, and supports more and more applications and users
−Weak for problems, and easy to fail
⊕Network management have become an important part of network solution
√Lowest cost: human resources, devices, and capitals
√More intelligent network management services
⇒Network Management Status
⊗In a large network, we cannot finish the network management manually only
√We are in urgent need of automatic tool to assist network management better
√Devices and resources to be managed are likely to come from different vendors
−If each vendor provides independent management interface
−For example, Command Line Interface
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−The cost for learning the tools of different vendors will increase dramatically
−However, the private configuration management tools are the restrictions
⊗A set of standards covering service, protocol and MIB emerge, and they are widely used
√Simple Network Management Protocol
⇒SNMP-based Network Management Model
⊗Network Management Station
√It is often an independent device running network management application
-It provides a friendly human-machine interface, and the administrator can use it to finish all network management work
-It provides expiration management, accounting management, configuration management and performance management
⇒Agent
√Agent resides in the device to be managed
-It is responsible to receive and process request packets from network management station, and form response packet and send them to NMS
−Request includes: information query and execution of actions
√It can inform the emergency to NMS (by sending TRAP packet)
−Such as the interface state is changed, and the calling succeeds
√NMS and Agent use SNMP to exchange management information
⊗Network Management Protocol-SNMP
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√It is an application layer protocol based on TCP/IP network, and is used to exchange the network management information between network management station and the managed devices
-SNMPv2 can be used on multiple transmission protocols such as IPX and DDP
√Huawei-3com VRP supports the following three protocol versions:
-SNMPv1
-SNMPv2c
-SNMPv3
√The following parts will explain the protocols in details.
⊗Management Information Base
√Any resource to be managed is regarded as one object, named managed object
√MIB is a set of objects to be managed
√Agent will maintain a MIB
√The objects in MIB can be read and written or set
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