User`s manual

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Due to the power volume limitation, the maximum value is half of the port
volume of a switch.
TrunkRing: The MultiRing technology is part of the MSR technology which
combines the MSR with the port trunking technology. After multiple ports
aggregated, this is so-call port trunking (stat or learnt by LACP protocol), the
Trunk ID can be one of the port ID of the MSR technology. Configured the port
trunking first then you can add the Trunk group as a Ring Port in managed switch.
4.4.8 Multiple Super Ring Info
This page shows the RSR information.
ID: Ring ID.
Version: which version of this ring.
Role: This Switch is RM or nonRM
Status: If this field is Normal which means the redundancy is activated. If any one
of the links in the Ring is down, then the status will be Abnormal.
RM MAC: The MAC address of Ring Master of this Ring. It helps to find the
redundant path.
Blocking Port: This field shows which is blocked port of RM.
Role Transition Count: This means how many times this switch has changed its
Role from nonRM to RM or from RM to nonRM.
Role state Transition Count: This number shows how many times the Ring status
has been transformed between Normal and Abnormal state.
4.4.9 Loop Protection
The Switch supports loop eliminate function that based on per port or system
configure, and prevents any looping caused by RSTP and MSR ring. The
following figure shows the Loop Protect configuration.