About RSTP
Use RSTP to design a network with redundant cabling so that remote I/O communications automatically find an alternate path if a communication disruption occurs (for example, a cable breaks or a device becomes inoperable). This method does not require you to manually enable or disable communication paths.
Changing these parameters can affect sub-ring diagnostics, I/O determinism, and network recovery times.
Access the RSTP Tab
You can access the RSTP parameters in Control Expert by double-clicking these modules in the Control Expert rack view:
head module on the local rack (140CRP31200)
adapter module on the remote drop (140CRA31200 or BMXCRA312•0)
The RSTP tab appears:
Parameters
This table shows the Bridge priority parameters for the RSTP Operational State on the Control Expert RSTP tab:
Bridge Priority |
Value |
140CRP31200 |
Adapter Module |
|---|---|---|---|
Root |
0 |
default |
— |
Backup Root |
4096 |
for Hot Standby (automatic) |
— |
Participant |
32768 |
— |
default |
NOTE: In Hot Standby systems, the RSTP bridge priority is applied to the 140CRP31200 module in rack A. |
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