Siemens SIMATIC NET System Manual page 8

Table of contents
1.5.10 Network structures ................................................................................................................. 61
1.5.10.1 Infrastructure mode ................................................................................................................ 61
1.5.10.2 Ad hoc networks..................................................................................................................... 66
1.5.11 Other wireless technologies ................................................................................................... 66
1.6 Industrial Wireless Control ..................................................................................................... 67
1.6.1 Mobile wireless standards GSM, UMTS and LTE ................................................................. 67
1.6.2 The mobile wireless standard of the 5th generation .............................................................. 68
2 Network structures and network configuration ....................................................................................... 71
2.1 Integration of a production network in an enterprise network ................................................ 71
2.2 Network structures ................................................................................................................. 75
2.2.1 Network topologies ................................................................................................................ 75
2.2.2 Linear structure ...................................................................................................................... 75
2.2.3 Star structure .......................................................................................................................... 76
2.2.4 Ring structure ......................................................................................................................... 79
2.2.5 Redundant coupling of network segments with electrical and fiber-optic components ......... 81
2.2.6 VLAN ...................................................................................................................................... 82
2.3 Media redundancy ................................................................................................................. 82
2.3.1 Options of media redundancy ................................................................................................ 82
2.3.2 Media redundancy in ring topologies ..................................................................................... 83
2.3.3 MRP ....................................................................................................................................... 84
2.3.4 MRP Interconnection ............................................................................................................. 86
2.3.5 MRPD ..................................................................................................................................... 88
2.3.6 HRP ........................................................................................................................................ 89
2.3.7 PRP ........................................................................................................................................ 89
2.3.8 RNA ........................................................................................................................................ 91
2.3.9 STP / RSTP / MSTP .............................................................................................................. 92
2.3.10 RSTP+.................................................................................................................................... 93
2.3.10.1 Properties and functions of RSTP+ ....................................................................................... 93
2.3.10.2 Topology for RSTP+ .............................................................................................................. 94
2.3.11 Link aggregation..................................................................................................................... 97
2.4 Network security..................................................................................................................... 98
2.4.1 The Industrial Security concept of Siemens .......................................................................... 98
2.4.2 Firewalls ............................................................................................................................... 100
2.4.3 NAT/NAPT ........................................................................................................................... 101
2.4.4 "Virtual Private Networks" (VPNs) ....................................................................................... 102
2.4.5 Cell protection concept ........................................................................................................ 102
2.4.6 SIMATIC NET products for network security ....................................................................... 104
3 Examples of applications ..................................................................................................................... 107
3.1 Virtual segmentation ............................................................................................................ 107
3.2 Redundantly coupled networks ............................................................................................ 108
3.3 Data protection during remote maintenance ........................................................................ 110
3.4 Cell protection concept ........................................................................................................ 111
3.5 Network for high data throughput and many nodes ............................................................. 113
3.6 Optimization of a power screwdriver control ........................................................................ 114
3.7 Controlling material transportation with SCALANCE components ...................................... 116
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System Manual, 09/2019, C79000-G8976-C242-10
Industrial Ethernet