TRENDnet TL2-F7120 User Manual page 361

TRENDnet User's Guide
Syntax
Mode
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2* (forward-time - 1) >= max-age, and max-age >= 2 * (hello- time +1)
This command is a standardized implementation of the existing command;
spanning-tree timers. It operates similar to the existing command.
The STP forward timers can be configured in the switch, only if the spanning
tree functionality is not shutdown in the switch. The type of spanning tree
Mode should be set, if the functionality is already shutdown.
spanning-tree mst max-age <seconds(6-40)>
no spanning-tree mst max-age
Global Configuration Mode
TL2-F7120