Parallel Redundancy Protocol - Siemens SIMATIC NET RUGGEDCOM RS950G Equipment Manual

1.5.1

Parallel Redundancy Protocol

Parallel Redundancy Protocol (PRP) provides hitless network recovery by replicating
information over two physically independent Ethernet networks. The following
illustrates a typical PRP network:
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Figure 1.3
Note
PRP expands the Ethernet frame by 6 octets due to RCT (Redundancy Check Trailer).
Generation of PRP supervision frames also consumes bandwidth. As a result, the
network designer should keep in mind the overhead introduced by the PRP network
when calculating the network capacity.
RUGGEDCOM RS950G
Equipment Manual, 10/2023, C79000-G8976-1037-08
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2
Sending IED
RUGGEDCOM RS950G
Network A
Network B
RS900
IED
Receiving IED
PRP Network Design
1.5.1 Parallel Redundancy Protocol
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Introduction
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