ICP DAS USA FSM-510G series User Manual page 56

QoS Application Guide
# Balancing Chain - it could be central-block, terminal-1/2 or member.
# When role is balancing-chain/central-block, one ring port is member port and another is block port.
The block port is redundant port. It is blocked in normal state.
# When role is balancing-chain/terminal-1/2, one ring port is terminal port and another is member
port. Both ring ports are forwarded in normal state.
# When role is balancing-chain/member, both ring ports are member port. Both ring ports are
forwarded in normal state.
Note 1 - It must enable group1 before configure group2 as coupling.
Note 2 - When group1 or group2 is enabled, the configuration of group3 is invisible.
Note 3 - When group3 is enabled, the configuration of group1 and group3 is invisible.
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