This is a document for the SX300 series SNMP object names. There are 2 lists. mibs_1_1_2_0 which are all of the object names supported on the 1.1.2.0 firmware. The second list is mibs_1_2_7_76 which are the object names supported on the 1.2.7.76 firmware.
Additionally, I will list the object names that are different between the versions. The 1.2.7.76 software is not missing anything from the previous 1.1.2.0 release. However, the following below is what the 1.2.7.76 software contains that the 1.1.2.0 does not.
rlAAAAccountingDot1xMethod
rlAAAAccountingMngMethod
rlAutoSmartBusy
rlBrgMacHashFunction
rlBrgMacHashFunctionAfterReset
rlCascadeAfterResetTable
rlCascadeTable
rlEeeEnable
rlEeePortLldpLocalTable
rlEeePortLldpRemoteTable
rlEeePortLldpTable
rlEeePortTable
rlIgmpSnoopMulticastTvTable
rlIpArpInspectClearCountersAction
rlIpArpInspectEnable
rlIpArpInspectEnableVlanTable
rlIpArpInspectListTable
rlIpArpInspectLogInterval
rlIpArpInspectMibVersion
rlIpArpInspectTrustedPortTable
rlIpArpInspectValidation
rlIpDhcpOpt82RxOnUntrustedEnable
rlIpDhcpSnoopClearAction
rlIpDhcpSnoopCurrentEntiresNumber
rlIpDhcpSnoopEnable
rlIpDhcpSnoopEnableVlanTable
rlIpDhcpSnoopFileEnable
rlIpDhcpSnoopFileUpdateTime
rlIpDhcpSnoopMibVersion
rlIpDhcpSnoopStaticTable
rlIpDhcpSnoopTable
rlIpDhcpSnoopTrustedPortTable
rlIpDhcpSnoopVerifyMacAddress
rlIpSourceGuardEnable
rlIpSourceGuardMibVersion
rlIpSourceGuardPermittedRuleCounterTable
rlIpSourceGuardPortTable
rlIpSourceGuardRetryTime
rlIpSourceGuardRetryToInsert
rlIpSourceGuardTable
rlMaxIpDhcpSnoopingEntries
rlMaxIpDhcpSnoopingEntriesAfterReset
rlPhdForceMasterUnit
rlPhdNumberOfUnits
rlPhdStackFixedUnit
rlPhdStackFixedUnitLocation
rlPhdStackOrderBottomUnit
rlPhdStackOrderPermutation
rlPhdStackOrderTopUnit
rlPhdStackReloadUnit
rlPhdStackTable
rlPortVlanTriplePlayMulticastTvTable
rlSmartPortsCondenseMode
rlSshClientAuthenticationMethod
rlSshClientDeleteSelfKey
rlSshClientImportExportSelfKeyTable
rlSshClientPassword
rlSshClientPasswordChangeTable
rlSshClientRegenerateSelfKey
rlSshClientSaveImportedKeysWithPassphrase
rlSshClientSavePassphraseForExportingKeys
rlSshClientSelfPublicKeyFingerprintTable
rlSshClientSelfPublicKeyTable
rlSshClientUserName
rlStackActiveUnitIdTable
rlStackHybridTable
rlStackUnitMode
rlStackUnitModeAfterReset
rlTimeBasedPortTable
rlTimeBasedPortVersion
rsArpNumOfEntries
vlanTriplePlayMulticastTvTable
vlanTriplePlayTable