Rockwell Automation 1734-AENTR EtherNet/IP Network Configuration User Manual - Manual (Page 143)

Rockwell Automation Publication ENET-UM001L-EN-P - March 2014 143
Troubleshoot an EtherNet/IP Communication Module with Diagnostic Web Pages Chapter 10
Rockwell Automation Publication ENET-UM001L-EN-P - March 2014 143
Troubleshoot an EtherNet/IP Communication Module with Diagnostic Web Pages Chapter 10
I/O Connections
If you want to check the status of your module’s I/O connections, click the I/O
Connections tab.
The I/O Connections diagnostic web page opens.
The Lost column shows the number of I/O packets that were not received.
Switch Considerations
To help troubleshoot your EtherNet/IP network, you must use a managed
switch. These are important features in a managed switch:
• Internet Group Multicast Protocol (IGMP) snooping
• Support for Virtual Local Area Networks (VLAN)
• Port mirroring
IMPORTANT To troubleshoot lost I/O packets, review the I/O Packet Counter Statistics
table in the Diagnostic Overview tab. See page 125 .
IMPORTANT Use a switch equipped with wire-speed switching fabric. The switch fabric
is a measure of the maximum traffic that a switch can handle without
dropping a packet and without storing a packet in memory. Wire-speed
switching fabric refers to a switch that can handle the maximum data rate
of the network on each of its ports.
Switches are typically rated in Gbps. For a 10-port switch connected to
EtherNet/IP products, the maximum data rate needed is typically 100...200
MB/s. Therefore, a 10-port-switch rated at least 1 GB/s should be adequate
for an EtherNet/IP application.