Instruction manual

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In building a redundant ring network configuration, the backup link must be connected securely and has
no risk for failure. The switch provides a user friendly management interface to configure the ring
network. It also provides a helpful function to examine the status of all members in a ring. Refer to
section 5.4.5 for more information about how to configure a ring network.
3.3.2 Fault Monitoring & Activating Backup Link
The master monitors the network continously. As any fault is reported, the master activates (enable) the
backup link in standby state immediately to recover the communication channel and keep the network
operating. The fault may be cable disconnection as shown below:
From standby state, the backup link enters into backup state. Other faults could be a switch failed
due to function failure or power problem as shown below:
The redundant ring function can support not only one fault case but also multiple faults cases at the
same time and give much faster reponse time than typical Spanning Tree Protocol.
3.3.3 Repairing the Network & Standby Recovery
When the backup link is activated to support continuous network operation, the failed section in the ring
is blocked and isolated for physical examination and reparing by network administration people. After
the failure is repaired, the master provides a useful interface for administrator to examine the health of
the network until all elements and whole network are sure to recover back to normal condition. The ring
network can enter into standby state (on guard) again. Refer to section 5.4.5 for more information
about how to recover the network after repairing.