Installation guide
Network Infrastructure for EtherNet/IP™
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3.5.2 Traps.................................................................................................................................................. 3-22
3.5.3 Network Management and Web-based Management Software......................................................... 3-23
3.6 Isolated vs. Integrated Networks ............................................................................................................. 3-23
3.6.1 Security Issues................................................................................................................................... 3-24
3.6.1.1 Firewalls......................................................................................................................................... 3-24
3.6.1.2 Routers and Switches ..................................................................................................................... 3-24
3.7 Traffic Management with VLANs........................................................................................................... 3-24
3.7.1 How VLANs Work ........................................................................................................................... 3-24
3.7.2 VLAN Benefits ................................................................................................................................. 3-25
3.8 Topologies to Provide Ethernet Network Redundancy............................................................................ 3-25
3.8.1 IEEE Standard Network Redundancy Options.................................................................................. 3-26
3.8.1.1 Spanning Tree Protocol Method..................................................................................................... 3-26
3.8.1.2 Link Aggregation ........................................................................................................................... 3-27
3.8.2 Ring Redundancy.............................................................................................................................. 3-27
3.8.3 Dual Homing..................................................................................................................................... 3-28
4 DESIGNING THE INFRASTRUCTURE ..................................................................................4-29
4.1 Network Design Method.......................................................................................................................... 4-29
4.1.1 Design Steps for Isolated EtherNet/IP Networks .............................................................................. 4-29
4.1.2 Definition of Application Requirements ........................................................................................... 4-30
4.1.3 Logical Network Design ................................................................................................................... 4-31
4.1.4 Physical Network Design.................................................................................................................. 4-31
4.2 Non-Isolated EtherNet/IP Networks........................................................................................................ 4-32
4.2.1 Definition of Application Requirements ........................................................................................... 4-32
4.2.2 Logical Network Design ................................................................................................................... 4-33
4.2.3 Physical Network Design.................................................................................................................. 4-34
4.2.4 Design Verification ........................................................................................................................... 4-34
4.2.5 Summary of Key Points on EtherNet/IP Design ............................................................................... 4-34
4.3 EtherNet/IP Infrastructure Design Issues................................................................................................. 4-35
4.3.1 Full-Duplex vs. Half-Duplex Implications........................................................................................4-35
4.4 Layout and Wiring Considerations.......................................................................................................... 4-36
4.4.1 Length of Run and Category of Cable............................................................................................... 4-36
4.4.2 Cable Routing.................................................................................................................................... 4-38
4.4.3 Categories of Conductors/Wiring...................................................................................................... 4-38
4.4.4 General Design Wiring Guidelines.................................................................................................... 4-38
4.4.5 Wiring External to Enclosures........................................................................................................... 4-39
4.4.6 Wiring Inside Enclosures .................................................................................................................. 4-40
4.4.7 Cable Grounding Considerations ...................................................................................................... 4-40
4.5 Industrial Ethernet Connectors ................................................................................................................ 4-42
4.5.1 Attributes of Industrial Ethernet Cables ............................................................................................ 4-42
4.5.1.1 Oil-resistant Jackets........................................................................................................................ 4-42
4.5.1.2 Plenum-rated Cables....................................................................................................................... 4-43
4.5.1.3 Weld Splatter-Proof Cables............................................................................................................ 4-43
4.5.1.4 High Flex........................................................................................................................................ 4-43
4.5.1.5 Ambient Temperature..................................................................................................................... 4-43
4.6 Performance Considerations: The Need for Switches ............................................................................. 4-43
4.6.1 Performance of Switches................................................................................................................... 4-43
4.7 Switching Technologies........................................................................................................................... 4-44
4.8 IGMP Snooping....................................................................................................................................... 4-45
4.8.1 Joining a Multicast Group................................................................................................................. 4-47
4.8.2 Leaving a Multicast Group................................................................................................................ 4-48