1+1 Hot Standby Protected Link Configuration; Figure 11 1+1 Setup - Trango Systems TrangoLINK GigaPlus User Manual

1+1 Hot Standby Protected Link Configuration

Figure 11 shows the protected 1+1 hot standby configuration.
This configuration consists of two GigaPlus units at each end of the link. The easiest way
to think of a 1+1 setup is a single 1+0 link operating normally with another standby link
ready to take over in the event of a failure condition.
The standby units monitor the active link, including receiving the same signal from the
far end, but the standby does not transmit a signal unless it becomes the active unit as
the result of a failure detection and subsequent failover event. The standby units
monitor the health of the active unit by polling it through the redundancy cable part
number CBLDAT-RIU3.
If there is an event that triggers a failover from active to standby, both ends of the link
will switch to the standby link. This means that a network switch or router capable of
Rapid Spanning Tree Protocol (RSTP), BGP or OSPF routing must move the traffic to the
standby link on both ends. To assist in this process, Rapid Port Shutdown (RPS) can be
enabled on the failed unit as an action after a failover occurs.

Figure 11 1+1 Setup

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Trango Systems, Inc. GigaPlus User Manual Rev 3.1