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FL SWITCH MM HS(Rapid) Spanning Tree
6874_en_16
PHOENIX CONTACT
5-11
5.2.1.4
Fast ring detection switch-over times
With the maximum permissible number of 57 switches in the ring, the following diagram
illustrates the switch-over time.
Figure 5-10
Switch-over times for a maximum ring with 57 switches
5.2.2
Connection failure - Example
The following diagram illustrates an RSTP ring with six switches, where switch 1 is the root.
The ring extends over port 1 and port 2 for each switch. On switch 4, the loop is broken by
a blocking port.
If a cable interrupt occurs at the point indicated by the star, this produces the following
entries on the "RSTP Fast Ring Detection" web page:
Switch 3 - Failed on Port A
Switch 4 - Broken
100
200
300
400
500
200
400
600
800
1000
Switch-over time with 57 switches in the ring
Maximum switch-over time in ms
Number of entries in the MAC address table
0
0
6784100065
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