Design And Implementation Of Embedded SNMP Agent System Based On EOC

Along with the continuous advances of EOC technology,EOC is gradually being appliedto the solve the last100meters broadband problem that encountered in the transformation ofthe dual-network by State Administration of Radio Film and Television. However,the largeamount of applications of EOC makes the coaxial network management facing difficult.WithSNMP matures,SNMP is being applied to the management of the EOC, Thus can providetechnical support for EOC in the network management.This paper designs a set of embedded SNMP Agent system based on EOC by analyzingthe technology of EOC and SNMP,combining with the demands at the same time.Which canturn directly the management by people indirectly to manage the Local terminal and terminalof EOC the by SNMP Agent.This paper accomplishs ultimately the embedded SNMP Agentsystem based on EOC by using EOC local terminal as the hardware development platformand using the embedded Linux operating system as the software design platform.This paper describes in detail all the work done in design and implementation of SNMPnetwork management agent systemin.At first,the paper analyzes the development status ofEOC and SNMP,and studies the technology associated with them.By analysing the functionalrequirements of local terminal management,terminal management and TRAP,this paper designa software overall architecture;and through system transplantation in the cross-developmentenvironment,this paper built an embedded Linux system.Secondly,MIB is converted into Ccode and compiled into the SNMP Agent,and by extending the NET-SNMP Agent source,thuscan realize the three functions:the processing of the SNMP packets, the processing of systemsbusiness,and the interactive of MME packet;and realized TRAP function by analyzing themechanism of TRAP.In addition,this paper proposes a scheme to solve the conflicts that arisein the multi-threaded access to critical resources by using the semaphore and PV primitives toachieve mutually exclusive access.Finally,through perform a test of system functions of theSNMP network management agent,and analyze the data generated by the testing process,theresult shows the various functions of the system have been implemented.