FL SWITCH LM ...
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PHOENIX CONTACT 7278_en_04
4.2.4.6 Reconfiguration times
The reconfiguration time for a Rapid Spanning Tree depends on the timer values for
MaxAge and Forward Delay.
The minimum reconfiguration time is:
2 × Forward Delay
The maximum reconfiguration time is:
2 × Forward Delay + MaxAge
For the values recommended by the IEEE standard, the value for ten active STP switches
along a path beginning with the root switch is between 30 s and 50 s.
Switch-over time response to be expected for Rapid Spanning Tree
Overview of the switch-over time response to be expected for the maximum number of
switches within a Spanning Tree segment.
MaxAge Hello Time Forward Delay Maximum Number of
Active RSTP Switches
Switch-over
time
10 s 1 s ≥ 6 s 5 22 s
20 s 1 s ≥ 11 s 10 42 s
30 s 1 s ≥ 16 s 15 62 s
40 s 1 s ≥ 21 s 20 82 s
20 s 2 s 15 s 9 50 s
Bold/italic
= Default
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