Description: Proprietary extensions for the rfc1156 defined atEntry. A proprietary atTable entry contains 3 standard objects and the 2 proprietary objects listed below. The standard objects are: atIfIndex, atPhysAddress and atNetAddress. To add an atEntry to the atTable, MIB-II defines the atPhysAddress as the validating item. Therefore, atPhysAddress must be the last item in the message when adding an entry. To add to the atTable the user must provide the atNetAddress followed by the atPhysAddress. The 2 proprietary objects associated with this entry are provided by the agent. The rAtAge is incremented as the entry ages and the rAtStatic entry is set to static. All atEntries manually defined are considered static and are not removed by the agent until specifically requested by the manager. To remove an atEntry, the atPhysAddress should be set to a NULL string. The INDEX value is constructed from the interface index of the desired entry, the integer value 1, and the network address of the desired entry.