Conversely, when forwarding a frame from the ring to a PRP network, a RedBox insert
the LanId “A” or ”B” into the RCT, depending if it is RedBox A or RedBox B.
4.5.2 Connecting one PRP Networks to several HSR Rings
A PRP network can be connected to any number of HSR rings, but these rings cannot
be connected between themselves, neither by QuadBoxes nor by another PRP
network since this would create loops.
DANH
S1610ENa
DANH
DANH
DANH DANH
H49
RedBox
“A“
LAN A
LAN B
H49
RedBox
“B“
DANP
DANP
Source
DANH DANH
DANH
DANH DANH
H49
RedBox
“A“
H49
RedBox
“B“
Source
Ring A Ring B
Figure 10: Coupling Several HSR Rings to a PRP Network