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19 Spanning Tree Protocol
(5) Setting status transition times
For timer-based operation, the port status transitions at a fixed time interval from
Discarding to Learning, and then Forwarding. The time required for these status transitions
can be set. A small value can be set to transition more quickly to the Forwarding status.
Points to note
If no value is set, 15 seconds is used for the status transition time. When changing
this parameter to a shorter time, make sure that the relationship between the BPDU
maximum enabled time (max-age) and sending interval (hello-time) satisfies the
following: 2 x (forward-time - 1) ≥ max-age ≥ 2 x (hello-time + 1).
Command examples
1.
(config)# spanning-tree mst forward-time 10
Sets the status transition time for Multiple Spanning Tree BPDUs to 10 seconds.
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