Chapter 5
Setup and Configuration
RUGGEDCOM ROX II
User Guide
722 Viewing RSTP Per-Port Statistics
Parameter Description
Protocol (MSTP), this is an external root path cost, which is the cost of the path from the
Internal Spanning Tree (IST) root (i.e. regional root) bridge to the Common Spanning Tree
(CST) root (i.e. network "global" root) bridge.
Regional Root Path Cost For the Common and Internal Spanning Tree (CIST) instance of the Multiple Spanning Tree
Protocol (MSTP), this is the cost of the path to the Internal Spanning Tree (IST) root (i.e.
regional root) bridge
Configured Hello Time The configured hello time from the Bridge RSTP Parameters menu.
Learned Hello Time The actual hello time provided by the root bridge as learned in configuration messages. This
time is used in designated bridges.
Configured Forward Delay The configured forward delay time from the Bridge RSTP Parameters menu.
Learned Forward Delay The actual forward delay time provided by the root bridge as learned in configuration
messages. This time is used in designated bridges.
Configured Max Age The configured maximum age time from the Bridge RSTP Parameters menu.
Learned Max Age The actual maximum age time provided by the root bridge as learned in configuration
messages. This time is used in designated bridges.
Total Topology Changes A count of topology changes in the network, as detected on this bridge through link failures
or as signaled from other bridges. Excessively high or rapidly increasing counts signal
network problems.
Section 5.34.11
Viewing RSTP Per-Port Statistics
To view Rapid Spanning Tree Protocol (RSTP) statistics for each port, navigate to switch » spanning-tree »
port-rstp-stats. The RSTP Port Statistics form appears.
Figure 835: RSTP Port Statistics Form
1. Slot 2. Port 3. STP State 4. STP Role 5. STP Cost 6. Desig Bridge Priority 7. Desig Bridge MAC 8. Oper Edge
This table provides the following information:
Parameter Description
Slot Synopsis: sm, lm1, lm2, lm3, lm4, lm5, lm6, trnk
The slot of the module that contains this port.
Port The port number as seen on the front plate silkscreen of the module.
STP State Synopsis: disabled, blocking, listening, learning, forwarding, linkDown, discarding
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