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58 Rockwell Automation Publication ENET-RM002C-EN-P - May 2013
Chapter 3 Ethernet Infrastructure Features
Device Commissioning
There are multiple methods for assigning IP addresses. Switches on the product,
such as thumbwheels, push buttons, or HIM modules, provide a static address
that survives power cycles.
Stratix switches support DHCP port allocation. DHCP port allocation is a
hybrid solution for IP addressing because it provides easy device replacement, but
is topology dependant.
Option Description
Static Devices are hard-coded with an IP address.
Advantage
Simple to commission and replace
Disadvantage
In large environments, can be burdensome to maintain
Static via BOOTP
configuration
A server assigns devices an IP address.
Precursor to DHCP
Advantage
Supported by every device
Disadvantages
• Requires technician to configure IP address/MAC address when a device is replaced
• Requires a PC for commissioning and replacement (unless there are switches to set the
address offline)
• Adds complexity and point of failure
DHCP A server assigns IP addresses from a pool (not recommended).
Advantages
• Efficient use of IP address range
• Can reduce administration work load
Disadvantages
• More complex to implement and adds a point of failure
• Devices get different IP addresses when they reboot
DHCP option 82 A server assigns consistent IP addresses from a pool (not recommended).
Advantages
• Efficient use of IP address range
• Can reduce administration work load
Disadvantages
• More complex to implement and adds a point of failure
• Mixed environments do not always work
DHCP port-based
allocation
IP addresses are automatically assigned per physical switch port.
Advantages
• Efficient use of IP address range
• Eases maintenance and replacement in large environments
Disadvantage
Requires some maintenance and upkeep on a per switch basis
- Reference Manual 1
- Important User Information 2
- Summary of Changes 3
- New and Updated 3
- Information 3
- Table of Contents 5
- Chapter 4 6
- Chapter 5 6
- Predict System Performance 6
- Studio 5000 Environment 10
- Additional Resources 11
- EtherNet/IP Overview 13
- Network Protocols 14
- Configuration Requirements 15
- Gateway Address 17
- Subnet Mask 18
- EtherNet/IP Modules in a 19
- Control System 19
- Bridge across Networks 20
- Chapter 2 21
- Topologies 22
- Repeaters 25
- Media Converters 26
- Routers and Gateways 27
- Switches 28
- Autonegotiation 29
- Full-duplex Mode 30
- Chapter 3 31
- Transmission Packets 32
- Transmission Protocols 35
- Domain Name System (DNS) 36
- Network Address Translation 38
- Supported NAT Topologies 39
- Virtual LANs and 42
- Segmentation 42
- VLAN Trunking 44
- Quality of Service (QoS) 45
- Resiliency 46
- Resiliency Protocols 47
- EtherChannel Protocol 49
- Flex Links Protocol 50
- Device-level Ring (DLR) 52
- Forwarding 54
- Blocking 54
- Internet Group Management 55
- Protocol (IGMP) 55
- Port Security 56
- Security Violations 57
- Device Commissioning 58
- EtherNet/IP Protocol 59
- Terminology 61
- TCP Connections 62
- CIP Connections 62
- CIP Connection Message Types 63
- CIP Connection Types 63
- EtherNet/IP Network 66
- Specifications 66
- Packets Rate Capacity 69
- Requested Packet 70
- Interval (RPI) 70
- Messaging 71
- Explicit Messages 72
- CIP Safety 73
- CIP Sync 74
- Integrated Motion on an 76
- Connectivity to IT 77
- System Prediction Goals 80
- Step 4 or 6: 81
- Does System 81
- Performance Calculations 83
- Calculate Packets/Second 86
- (Fastest) 88
- Example: Predict System 90
- Performance 90
- Explicit Messaging 92
- 1756-EN2T Module 1 93
- MAX (Rack-optimized) 98
- MAX (Analog Non-Isolated) 98
- MAX (Produced/Consumed Tag) 98
- Rockwell Automation Support 106
- Documentation Feedback 106
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