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RUGGEDCOM ROS
User Guide
Section 5.3.2.1
RSTP in Structured Wiring Configurations
RSTP may be used to construct structured wiring systems where connectivity is maintained in the event of link
failures. For example, a single link failure of any link between A and N in
bridges 555 through 888 connected to the network.
Figure 92: Example - Structured Wiring Configuration
To design a structured wiring configuration, do the following:
1.
Select the design parameters for the network.
What are the requirements for robustness and network failover/recovery times? Are there any special
requirements for diverse routing to a central host computer? Are there any special port redundancy
requirements?
2.
Identify required legacy support.
Are STP bridges used in the network? These bridges do not support rapid transitioning to forwarding. If these
bridges are present, can they be re-deployed closer to the network edge?
3.
Identify edge ports and ports with half-duplex/shared media restrictions.
RSTP in Structured Wiring Configurations
4
3
C
1
2
444
6
5
4
G
I
H
1
2
1
555
4
3
4
1
A
2
B
D
E
3
K
J
2
1
666
777
3
4
Setup and Configuration
Figure 92
would leave all the ports of
1
2
4
3
F
1
2
444
6
3
5
4
M
L
2
1
888
3
4
Chapter 5
N
2
3
143
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