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Technical Manual
GE Reason H49
26
H49/EN M/C22
4.5
PRP-HSR Coupling
A HSR may be coupled to a PRP network through two RedBoxes, one for each LAN as
shown in the figure here below. In this case, the RedBoxes are configured to support
PRP traffic on the interlink and HSR traffic on the ring ports.
The sequence number from the PRP RCT is reused for the HSR tag and vice versa, to
allow frame identification from one network to the other and to identify pairs and
duplicates on the HSR ring, introduced by a twofold injection into the ring through the
two HSR RedBoxes.
DANH
S1607ENa
DANH
DANH
DANH
"A"
"B"
H49
RedBox
“A“
Destination
LAN A
LAN B
"AB"
"BA"
DANP
DANP
Source
“A” frames
“B” frames
duplicated redundant frames
frame is removed from the ring by the node
DANH
H49
RedBox
“B“
Figure 7: Coupling two PRP LANs to an SRS Ring
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