Redundancy Overview - Planet IGS-504HPT User Manual

2.1.7 Redundancy Overview

The IGS-624HPT Industrial Gigabit PoE+ Switch 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
Main
Traffic is changed from Primary -Port to Backup-Port
l Auto-detects link status and redundant dual ports with the same connector type
l Only Primary Port is active at a time, the Backup Port is blocked.
l When Primary Port link failure occurs, the traffic swaps to Backup Port automati-
cally.
l Once the Primary Port status is connected, the traffic will swap from Backup Port
to Primary Port.
Redundancy
Primary
Backup
Redundancy
Primary
Backup
Figure 2-5: Redundancy Behavior Topology
< Primary Port >
Link Status : Up
Traffic Flow : Forwarding
< Backup Port >
Link Status : Down
Traffic Flow : Blocking
< Primary Port >
Link Status : Down
Traffic Flow : N/A
< Backup Port >
Link Status : Up
Traffic Flow : Forwarding
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