Planet IGS-10020HPT-U User Manual page 365

Set "MEP5" = Port2, "MEP6" = Port1 and VLAN ID = 3001; click "Set" button to save the ERPS configuration for Switch 3.
To avoid loop, please don't connect Switches 1, 2 & 3 together in the ring topology before configuring
the end of ERPS .
Follow the configuration or ERPS wizard to connect Switches 1, 2 and 3 together to establish ERPS application:
MEP2 ←→ MEP3 = Switch1 / Port2 ←→ Switch2 / Port2
MEP4 ←→ MEP5 = Switch2 / Port1 ←→ Switch3 / Port2
MEP1 ←→ MEP6 = Switch1 / Port1 ←→ Switch3 / Port1.
User's Manual of IGS-10020HPT-U
365