Enterasys Networks 5H1XX, 5G1XX manual 10Device Control Menu Screens

Using the Spanning Tree Algorithm

Parameter	Default	Description
Hello Time	2	Time interval at which the root device transmits a
(in seconds)		configuration message.
		The minimum value is 1.
		The maximum value is the lower of 10 or
		[(Max. Message Age / 2) -1].
Max Age	20	The maximum time a device can wait without
(in seconds)		receiving a configuration message before attempting
		to reconfigure. All device ports (except for designated
		ports) should receive configuration messages at
		regular intervals. Any port that ages out STA
		information (provided in the last configuration
		message) becomes the designated port for the attached
		LAN. If it is a root port, a new root port is selected
		from among the device ports attached to the network.
		The minimum value is the higher of 6 or
		[2 x (Hello Time + 1)].
		The maximum value is the lower of 40 or
		[2 x (Forward Delay - 1)].
Forward Delay	15	The maximum time the root device will wait before
(in seconds)		changing states (i.e., listening to learning to
		forwarding). This delay is required because every
		device must receive information about topology
		changes before it starts to forward frames. In addition,

each port needs time to listen for conflicting information that would make it return to a blocking state; otherwise, temporary data loops might result.

The maximum value is 30.

The minimum value is the higher of 4 or [(Max. Message Age / 2) + 1].

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