hwErpsPortTrackEntry
1.3.6.1.4.1.2011.5.25.256.1.7.1
The table includes the information of ERPS ports track.
The index of the table is ERPS ring identifier, port type, port identifier1, port identifier2, port identifier3, port identifier4, protocol type.
If it is an ethernet port including fast ethernet/gigabit ethernet/eth-trunk, the port type is 1, the port identifier1 is the IfIndex of the ethernet port.
the other port identifier is for extension and not used currently, should be set 0.