Rapid Spanning Tree Protocol (Rstp); Figure 59: Application Of Prp At Substation Level - GE MiCOM P747 Agile Technical Manual

Chapter 8 - Redundant Ethernet
DS Agile gateways
H600 switch
Ethernet
Up to
6 links
C264
RS485
Bay level
Type 1
E01017

Figure 59: Application of PRP at substation level

4.2

RAPID SPANNING TREE PROTOCOL (RSTP)

RSTP is a standard used to quickly reconnect a network fault by finding an alternative path, allowing loop-
free network topology. Although RSTP can recover network faults quickly, the fault recovery time depends
on the number of devices and the topology. The recovery time also depends on the time taken by the
devices to determine the root bridge and compute the port roles (discarding, learning, forwarding). The
devices do this by exchanging Bridge Protocol Data Units (BPDUs) containing information about bridge IDs
and root path costs. See the IEEE 802.1D 2004 standard for further information.
246
MiCOM H382
C264 *
H368
Ethernet
Up to
4 links
Bay level
Type 2
TX copper link
FX optical fibre Ethernet
RS485, RS422
For PRP this is SRP, for DHP this is SWD
*
** For PRP this is PRP REB, for DHP this is DHP REB
MiCOM P747
SCADA or PACiS OI
H600 switch
Px4x **
Bay level
Type 3
P747-TM-EN-1
P747-TM-EN-1.1