Accton Technology 4508, CheetahSwitch Workgroup manual Management Guide Spanning Tree Configuration

Management Guide

Spanning Tree Configuration

The following figures and tables describe Bridge STA configuration.

Switch

Parameter	Default	Description
Usage	Enabled	Enable this parameter to participate in an STA compliant
		network.
Priority	32,768	Device priority is used in selecting the root device, root port, and
		designated port. The device with the highest priority becomes
		the STA root device. However, if all devices have the same
		priority, the device with the lowest MAC address will then
		become the root device.
		Enter a value from 0 - 65535.
		Remember that the lower the numeric value, the higher the
		priority.

When the Switch Becomes Root

Parameter	Default	Description
Hello Time	2	The time interval (in seconds) at which the root device transmits
		a configuration message.
		The minimum value is 1. The maximum value is the lower of 10
		or [(Max. Message Age / 2) -1].
Max (Message) Age	20	The maximum time (in seconds) a device can wait without
		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)].

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