3Com 3500 manual Bridge spanningTree stpForwardDelay

264CHAPTER 9: BRIDGE-WIDE PARAMETERS

bridge spanningTree stpForwardDelay

✓3500

✓9000

✓9400

✓3900

✓9300

Sets the amount of time that the bridge spends in each of the listening and learning states if it is the root bridge. The current value is shown in the bridgeFwdDelay field of the bridge display.

Valid Minimum Abbreviation

b sp stpf

Important Considerations

■This value temporarily prevents a bridge from starting to forward data packets to and from a link until news of a topology change has spread to all parts of a bridged network.

■The recommended and default value is 15 seconds.

■Setting the value too low can result in temporary loops while STP reconfigures the topology.

■Setting the value too high can lead to a longer wait while STP reconfigures the topology.

■If the configuration was not successful, the system notifies you that your changes failed, and you can try to reenter the changes.

■Although the possible range for stpForwardDelay is 4 – 30, the available range is constrained by the following inequality:

2 x (stpForwardDelay - 1 second) >= stpMaxAge

Options

Prompt	Description	Possible Values	[Default]
STP forward delay	Time (in seconds) that a	4 – 30 seconds	15 (factory
	bridge spends in the listening		default), or
	state and the learning state		current value