1.2.1.19.2 Simple Network Management Protocol (SNMP) Configurations

SNMP Specific User Configurations

• SNMP Server Root Directory Path:

  • The mount point for the files used by SNMP

  • Default value: "/mnt/mchpSite1/"

  • Symbol TCPIP_SNMP_MOUNT_POINT

• BIB file name:

  • The Microchip mib2bib.jar compiler is used to convert the Microchip MIB script to binary format and it is compatible with the Microchip SNMP agent. which is written in ASCII format.

  • Name of the bib file for SNMP is snmp.bib.

  • Default value:"snmp.bib"

  • Symbol TCPIP_SNMP_BIB_FILE_NAME

• Maximum SNMP message size:

  • The maximum length in octets of an SNMP message which this SNMP agent able to process.

  • As per RFC 3411 snmpEngineMaxMessageSize and RFC 1157 ( section 4- protocol specification ) and implementation supports more than 480 whenever feasible. -It should be divisible by 16

  • Default value: 480

  • Symbol TCPIP_SNMP_MAX_MSG_SIZE

• Maximum Community Length:

  • This is the maximum length for community string.

  • Application must ensure that this length is observed.

  • SNMP module adds one byte extra after TCPIP_SNMP_COMMUNITY_MAX_LEN for adding '\0' NULL character.

  • Default value: 16

  • Symbol TCPIP_SNMP_COMMUNITY_MAX_LEN

• Maximum Community Entries:

  • The maximum number of community entries

  • Specifying more strings than TCPIP_SNMP_MAX_COMMUNITY_SUPPORT will result in the later strings being ignored (but still wasting program memory).

  • Specifying fewer strings is legal, as long as at least one is present.

  • Default value: 3

  • Symbol TCPIP_SNMP_MAX_COMMUNITY_SUPPORT

• Read Community Name:

  • The name of the read community

  • Default value: "harmony"/"read"

  • Symbol TCPIP_SNMP_STACK_READCOMMUNITY_NAME_IDXn

• Write Community Name:

  • The name of the write community

  • Default value: "unicorn"/"write"/"harmony"

  • Symbol TCPIP_SNMP_STACK_WRITECOMMUNITY_NAME_IDXn

• Trap Support:

  • Enable trap support

  • Default value: true

  • Symbol TCPIP_SNMP_USE_TRAP_SUPPORT

• Trap table size: -This table maintains list of interested receivers that should receive notifications when some interesting event occurs.

  • Default value: 2

  • Symbol TCPIP_SNMP_TRAP_TABLE_SIZE

• V2 Trap Support:

  • Enable V2 trap support

  • Default value: true

  • Symbol TCPIP_SNMP_STACK_USE_V2_TRAP

• Include SNMP Custom Template:

  • Include the supplied template/model into the project

  • Default value: true

  • Symbol TCPIP_SNMP_CUSTOM_TEMPLATE

• SNMP Task Rate (in msec):

  • SNMP task processing rate, in milliseconds.

  • The SNMP module will process a timer event with this rate for maintaining its own queues, processing timeouts, etc.

  • The lower the rate (higher the frequency) the higher the module priority and higher module performance can be obtained

  • The value cannot be lower than the TCPIP_STACK_TICK_RATE.

  • Value is in milliseconds

  • Default value: 200

  • Symbol TCPIP_SNMP_TASK_PROCESS_RATE

• Maximum OID Length:

  • Maximum length for the OID String.

  • Change this to match your OID string length.

  • Default value: 18

  • Symbol TCPIP_SNMP_OID_MAX_LEN

• Maximum non record OID:

  • Update the Non record id OID value which is part of CustomSnmpDemoApp.c file.

  • This is the maximum size for gSnmpNonMibRecInfo which is the list of static variable Parent

  • OIDs which are not part of mib.h file. This structure is used to restrict access to static variables of SNMPv3 OIDs from SNMPv2c and SNMPv1 version.

  • With SNMPv3 all the OIDs accessible but when we are using SNMPv2c version , static variables of the SNMPv3 cannot be accessible with SNMP version v2c.

  • SNMP agent supports both SMIv1 and SMIv2 standard and snmp.mib has been updated with respect to SMIV2 standard and it also includes MODULE-IDENTITY ( number 1) after ENTERPRISE-ID.

  • Default value: 3

  • Symbol TCPIP_SNMP_MAX_NON_REC_ID_OID

• Notify Community Length:

  • Maximum length for SNMP Trap community name

  • Default value: TCPIP_SNMP_COMMUNITY_MAX_LEN

  • Symbol TCPIP_SNMP_NOTIFY_COMMUNITY_LEN

• Trap community maximum length:

  • The trap comunity maximum length

  • Default value: 16

  • Symbol TCPIP_SNMP_TRAP_COMMUNITY_MAX_LEN_MEM_USE