Setting this object to enableLearning(2) causes the agent to learn MAC source addresses from readable frames received on this port. The agent records distinct addresses (along with addresses previously learned on this port) in erptrAddrLearnAddressTable. The agent actively learns addresses on this port until one of the following events occurs: - The maximum allowable number of distinct addresses have been learned on this port, as specified by erptrAddrLearnPortCtrlCapacity. - The learning process is disabled by setting this object to disableLearning(3). The agent remembers learned addresses until this object is set to clearLearnedAddresses(4) or the module undergoes a power-up reset. Setting this object to disableLearning(3) causes the agent to stop learning addresses on this port, regardless of the number of addresses already learned and saved. Learning can be restarted on the port by setting this object to enableLearning(2). Setting this object to clearLearnedAddresses(4) causes the agent to delete any entries in erptrAddrLearnAddressTable associated with this port. If the value of erptrAddrLearnPortCtrlOperStatus for this port is learningEnabledAndActive(1) or learningEnabledAndStopped(2) when this object is set to clearLearnedAddresses(4), the agent will immediately begin learning new addresses on this port. Setting this object to other(1) has no effect. The agent always returns the value other(1) when this object is read.