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RL-ARM User's Guide (MDK v4)

RL-RTX RL-FlashFS RL-TCPnet TCP Socket Opening TCP Connection TCP Active Open TCP Passive Open Sending TCP Data Example for Sending Data Multiple TCP Connections UDP Socket Opening UDP Connection Sending UDP Data When DHCP Enabled When ARP Cache Empty Example for Sending Data IP Multicasting Multiple UDP Connections Configuring RL-TCPnet Static Configuration System Definitions Ethernet Network Interface PPP Network Interface SLIP Network Interface UDP Socket TCP Socket BSD Socket HTTP Server Telnet Server TFTP Server TFTP Client FTP Server FTP Client DNS Client SMTP Client SNMP Agent SNTP Client Error Function Runtime Configuration Library Files Using RL-TCPnet Stand Alone With RTX Kernel Event Driven Operation IP Address Assignment Ethernet Interface PPP Interface SLIP Interface Localhost Applications HTTP Server Script Language CGI Functions Ajax Support Using XML XML Example How it works SOAP Support SOAP Interface Large POST Messages Web Pages Default Page Error Pages Web on SD Card Web Update File System Interface Http Caching How it works Internal Web External Web Multi-user Authentication Using RAM File System FCARM File Converter PRINT Directive NOPRINT Directive PAGEWIDTH Directive PAGELENGTH Directive ROOT Directive Telnet Server Command Line Interface Multi-user Authentication Sending Reply Message Short Reply Long Reply Continuous Screen Update TFTP Server File System Interface TFTP Client File System Interface FTP Server File System Interface Multi-user Authentication Supported Commands FTP Client File System Interface SMTP Client SNMP Agent MIB Database MIB Interface MIB Entry MIB Table DNS Resolver Starting DNS Device Drivers Ethernet Driver Interrupt Mode Modem Driver Serial Driver Using Serial Link Cable Connection Modem Connection Windows Dial-up Add Direct Serial Link New Dial-up Connection Configure PPP Dial-up Configure SLIP Dial-up Debugging Enabling Debug Debug Level Redirecting Output Function Overview BSD Routines CGI Routines Ethernet Routines FTP Routines HTTP Routines IGMP Routines Miscellaneous Routines Modem Routines PPP Routines Serial Routines SLIP Routines SMTP Routines SNMP Routines System Functions TCP Routines Telnet Routines TFTP Routines UDP Routines RL-CAN RL-USB Example Programs Library Reference Appendix

SNMP Agent

The SNMP Agent manages a set of managed objects defined by the user in SNMP_MIB.c interface module. It can be used to control various system settings or IO peripherals from the SNMP manager.

The following SNMP Agent options are configurable from the Net_Config.c configuration file:

  • SNMP Agent switch enables or disables the SNMP Agent service in your application. It is enabled when this value is set to 1. It should be set to 0 when the SNMP Agent is not used in your application.
    #define SNMP_ENABLE     1
  • Community Name specifies the SNMP Community where an SNMP message is destined for. Only the members of the same community can communicate with each other using SNMP protocol. Default Community name is public.
    #define SNMP_COMMUNITY "public"
  • Port Number specifies the listening UDP port number. The default SNMP Agent listening port is 161.
    #define SNMP_PORTNUM   161
  • Trap Port Number specifies the UDP port number for Trap operations. The default SNMP Agent trap port is 162.
    #define SNMP_TRAPPORT  162
  • Trap Server specifies the IP address of the Trap Server which receives Trap messages. This IP address is used when the Trap Server IP is not specified in snmp_trap() function parameter.
    #define SNMP_TRAPIP1   192
    #define SNMP_TRAPIP2   168
    #define SNMP_TRAPIP3   0
    #define SNMP_TRAPIP4   1


  • When the SNMP client is not enabled, the ARM linker does not link the SNMP support modules to your application and thus reduces the code size and memory usage.
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