Transition Networks SISGM1040-162D - Manual (Page 89)

Transition Networks SISGM1040-162D-LR
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Rapid Spanning Tree
The Rapid Spanning Tree Protocol (RSTP) is an evolution of the Spanning Tree Protocol
and provides for faster spanning tree convergence after a topology change. The system
also supports STP and the system will auto detect the connected device that is running
STP or RSTP protocol.
RSTP - System Configuration
User can view spanning tree information about the Root Bridge.
User can modify RSTP state. After modification, click Apply button
RSTP mode: User must enable or disable RSTP function before configure the
related parameters.
Priority (0-61440): A value used to identify the root bridge. The bridge with the
lowest value has the highest priority and is selected as the root. The value must
be a multiple of 4096 according to the protocol standard rule.
Max Age (6-40): The number of seconds a bridge waits without receiving
Spanning-tree Protocol configuration messages before attempting a
reconfiguration. Enter a value between 6 through 40.
Hello Time (1-10): The time that controls switch sends out the BPDU packet to
check RSTP current status. Enter a value between 1 through 10.
Forward Delay Time (4-30): The number of seconds a port waits before
changing from its Rapid Spanning-Tree Protocol learning and listening to STP
states to the forwarding state. Enter a value between 4 through 30.
Note Follow the rule to configure the MAX Age, Hello Time, and Forward Delay
Time.
2 x (Forward Delay Time value – 1) > = Max Age value >= 2 x (Hello
Time value +1)