Configuring BMENOS0300 Ethernet Ports
Original instructions
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Configuration Via Rotary Switches
Configuration of the BMENOS0300 module port settings is performed exclusively by means of the two rotary switches on the front of the module:
Use a small flat head screwdriver to turn each rotary switch. 
1
ETH 1 Service Port configuration switch 
2
ETH 2 & 3 Device Network ports configuration switch
Use the rotary switches to configure the Ethernet ports, as described below.
Service Rotary Switch Configuration Positions
Use the Service rotary switch to configure the service port (ETH 1), as follows:
Switch Position
Configuration Setting Supports...
MIRROR
Port mirroring. Sends to ETH 1 a copy of Ethernet packets sent over all other Ethernet ports, including:
  • ETH 2
  • ETH 3
  • Backplane port
  • Internal port (connecting the three Ethernet ports on the front of the module to the module firmware)
ACCESS
General Ethernet communication to Ethernet devices, including:
  • A PC running Automation Device Maintenance, for the purpose of performing a firmware upgrade.
  • Distributed equipment in a non-looping Ethernet daisy chain.
DISABLE
No Ethernet packets pass through this port. This is the default setting.
UNUSED
The same behavior as the ACCESS switch position.
Device Rotary Switch Positions
Use the Device rotary switch to configure the network ports (ETH 2 and ETH 3).
NOTE: To enable RSTP, declare the BMENOS0300 module in Control Expert. To declare the module in Control Expert, add it to a rack in the PLC Bus or EIO Bus window.
Switch Position
Configuration Setting Supports...
HSBY/DIO
A non-deterministic distributed equipment Ethernet ring and RSTP, which employs two BMENOS0300 modules in a Hot Standby system as follows:
  • One module located in the primary Hot Standby local rack
  • One module located in the standby Hot Standby local rack.
When HSBY/ DIO is selected:
  • The BMENOS0300 module in the Hot Standby rack with CPU “A” becomes the RSTP root bridge on the DIO ring, with a bridge identifier priority value set to 0.
  • The BMENOS0300 module in the Hot Standby rack with CPU “B” has its bridge identifier priority value set to 4096 (decimal).
If you select HSBY/DIO, set the bridge identifier priority settings of the other devices in the DIO ring to a value greater than 0 so they will not attempt to become the root bridge.
RIO RING
A deterministic Ethernet RIO ring and RSTP.
When RIO Ring is selected, the BMENOS0300 module becomes the RSTP root bridge on the RIO ring, with a bridge identifier priority value set to 0.
If you select RIO Ring, set the bridge identifier priority settings of the other devices in the RIO ring to a value greater than 0 so they will not attempt to become the root bridge.
DIO RING
A non-deterministic distributed equipment Ethernet ring and RSTP.
When DIO Ring is selected:
  • The BMENOS0300 module bridge identifier priority value is fixed at 61440 (decimal).
  • The port cost of each network port (ETH 2 and ETH 3) are set to 200,000,000.
If you select DIO Ring, assign a bridge identifier priority to another device on the ring to a value less than 61440. As a result:
  • A device on the ring other than the BMENOS0300 module is the root bridge.
  • One of the network ports of the BMENOS0300 module is set to discarding state. This makes it possible to determine the health of the DIO ring by checking the status (discarding or forwarding) of module network ports.
DIO PORTS
Distributed equipment connected as DIO cloud or non-looping daisy chain. Does not support RSTP. This the default setting.
Applying Configuration Settings
Configuration settings take effect when the BMENOS0300 module powers up. Typically, you will configure switch settings when power to the module is turned off. Then, when you next apply power to the module, the settings you made are applied.
NOTE: Changing the switch positions while the BMENOS0300 module is operating has no immediate effect on the module. Any changes to switch positions made while the module is operating take affect only after power is turned off, and then turned back on.