High Availability Seamless Redundancy - Siemens SIMATIC NET RUGGEDCOM RS950G Equipment Manual

Introduction
1.5.2 High Availability Seamless Redundancy
1.5.2

High Availability Seamless Redundancy

The basic principle behind High-availability Seamless Redundancy (HSR) is the
replication of frames over both sides of the HRS ring. The following illustrates a
typical HSR network:
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Figure 1.4
All of the network nodes inside an HSR ring must be HSR-capable. HSR-unaware
nodes can be attached to the HSR ring through the use of a RedBox (Redundancy
Box). Compared to PRP, HSR only demands approximately half of the network
infrastructure. However, network bandwidth on an HSR ring is approximately halved
compared with a network ring based on RSTP technology.
Note
Current HSR implementation limits link utilization to 74% when using multicast
traffic.
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Sending IED
RUGGEDCOM RS950G
RUGGEDCOM RS900
IED
Receiving IED
HSR Network Design
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Equipment Manual, 10/2023, C79000-G8976-1037-08
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RUGGEDCOM RS950G