Interlogix MCR300-1T-2S - Manual (Page 10)

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Redundancy Overview
The MCR300-1T-2S provides rapid fiber redundancy of link for highly critical Ethernet applications. The redundant-mode supports
auto-recover function. If the destination port of a packet is link down, it forwards the packet to the other port of the backup pair. The
following figure shows the redundant function.
Main Primary
Backup
Redundancy
< Primary Port >
Link Status :
Up
Traffic Flow : Forwarding
< Backup Port >
Link Status :
Up
Traffic Flow : Blocking
Main Primary
Backup
Redundancy
< Primary Port >
Link Status :
Down
Traffic Flow : N/A
< Backup Port >
Link Status :
Up
Traffic Flow : Forwarding
Traffic is changed from Primary-Port to Backup-Port
Figure 2-4-2: Redundancy Behavior Topology
y
Link status auto detect and redundant on Dual ports with same connector type.
y
Only Primary-Port is active at a time, the Backup-Port is blocked.
y
While Primary-Port link fail occur, the traffic swap to Backup-Port automatically.
y
Once the Primary-Port status back to link up, the traffic swap from Backup-Port to Primary-Port.