SGS-6341-Series User Manual

Table Of Contents
22-127
SW2
SW3
SW4
2 2X
3X3
4
4
5X
5
6
7X
6
7
Figure 22
-5: The Topology Of the Instance 4 after the MSTP Calculation
22.5 MSTP Troubleshooting
In order to run the MSTP on the switch port, the MSTP has to be enabled globally. If
the MSTP is not enabled globally, it can’t be enabled on the port.
The MSTP parameters co-work with each other, so the parameters should meet the
following conditions. Otherwise, the MSTP may work incorrectly.
2×(Bridge_Forward_Delay -1.0 seconds) >= Bridge_Max._Age
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 based on the individual instances.
User’s Manual of SGS-6341 series