MLis MLB-E4200 Series, User Manual

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# Dual-Homing
# When role is dual-homing, one ring port is primary port and another is backup port. This backup
port is redundant port. In normal state, it is blocked.
Group 3 - It support configuration of the chain and balancing-chain .
# Chain - it could be head, tail or member .
# When role is chain/head, one ring port is head port and another is member port. Both ring ports
are forwarded in normal state.
# When role is chain/tail, one ring port is tail port and another is member port. The tail port is
redundant port. It is blocked in normal state.
# When role is chain/member, both ring ports are member port. Both ring ports are forwarded in
normal state.