Technical Manual
GE Reason H49
28
H49/EN M/C22
To avoid reinjecting a frame into the PRP network through the other RedBox, each
HSR frame carries the identifier of the PRP network from which the frame came
originally. Therefore, RedBoxes are to be configured with the NetId of the PRP
network to which they are attached.
Other combinations of PRP and HSR networks are allowed. Some of them are
explained in the following sections.
4.5.1
Connecting several PRP Networks to an HSR Ring
Up to six PRP networks can be connected to the same HSR ring, each being identified
by a 3- bit NetId.
The two RedBoxes that connect a PRP network with an HSR ring are configured with
the NetId (1..7) and the LanId (A=0/B=1), see the following figure.
DANH
S1609ENa
DANH
DANH
DANH
H49
RedBox
“1A“
LAN A
LAN B
H49
RedBox
“1B“
DANP
DANP
DANH
DANH
DANH
DANH
H49
RedBox
“2A“
LAN A
LAN B
H49
RedBox
“2B“
DANP
DANP
DANH
DANH
Figure 9: Coupling one HSR ring to several PRP Networks
To prevent reinjection of frames coming from one PRP network into another PRP
network or from the same, a RedBox only forwards from the HSR ring frames that do
not carry its own NetId. When inserting into the ring a PRP frame from LAN A or from
LAN B of a PRP network with a given NetId, a RedBox inserts into the PathId of the
HSR tag its own NetId and the LanId, i.e. one of “2”/”3”, “4”/”5”, “6”/”7”, “8”/”9”, “A”/”B”,
“C”/”D” or “E”/”F”, depending if it is RedBox A or B.
Summary of Contents for Reason H49
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