Mstp Troubleshooting - Planet XGS3-42000R User Manual

Switch2
Figure 16-3-4 The Topology Of the Instance 4 after the MS TP Calculation

16.4 MSTP Troubleshooting

 In order to run t he MS TP on the switch port, the MS TP has to be enabled globally. If the MS TP is not
enabled globally, it can't be enabled on the port.
 The MS TP parameters co work wit h each other, so the parameters should meet the following
conditions. Otherwis e, the MSTP may work incorrectly.
2×(Bridge_Forward_Delay -1.0 seconds ) >= Bridge_Max_A ge
Bridge_Max_Age >= 2 ×(Bridge_Hello_Time + 1.0 seconds)
 When users modify the MSTP parameters, they have to be sure about the changes of the topologies.
The global configuration is based on the bridge. Other configurations are bas ed on the individual
instances.
2
3
4
5X
4
5
Switch4
2X
3X
6
7
16-10
6
7X Switch3