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Smart Managed Compact Switch
118
PHOENIX CONTACT
If the "Broken" or "Failed" status lasts for longer than 60 seconds, it is no longer displayed
after the next topology modification, since these rings no longer exist.
When using RSTP fast ring detection, please note the following:
–
For RSTP fast ring detection, do not use devices that do not support this function.
–
Enable RSTP fast ring detection on all devices.
–
All data paths must be in full duplex mode.
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 en-
tries on the "RSTP Fast Ring Detection" web page:
Switch 3 - Failed on Port A
Switch 4 - Broken
In addition, switch 3 would also generate the "flWorkLinkFailure" trap, as long as the send-
ing of traps is not disabled.
Figure 5-9
Connection failure with RSTP ring detection
8089_en_03
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