Nortel Networks 1000BASE-LX describes the Spanning Tree Switch Settings parameters, 209418-A

162Chapter 3 Using the console interface

Table 37 describes the Spanning Tree Switch Settings parameters.

Table 37 Spanning Tree Switch Settings parameters

Parameter	Description
Bridge Priority	Indicates the management-assigned priority value of the bridge ID in hexadecimal
	notation, which is the most significant byte of the bridge ID. The STA uses this parameter
	to determine the root bridge (or designated bridge). For example, the bridge with the
	lowest bridge ID becomes the root bridge, with Bridge Priority values compared first,
	followed by the hardware addresses.
	Default Value	8000
	Range	0 to 65535
Designated	Indicates the bridge ID of the root bridge, as determined by the STA.
Root	Default Value	8000 (bridge_id)
	Range	0 to 65535
Root Port	Indicates the switch port number that offers the lowest path cost to the root bridge.
	Default Value	0
	Range	Unit: 0
		Port: 28
Root Path Cost	Indicates the path cost from this switch port to the root bridge.
	Default Value	0
	Range	Not applicable
Hello Time	Indicates the Actual Hello Interval, the amount of time between transmissions of
	configuration Bridge Protocol Data Units (BPDUs) that the root bridge is currently using.
	Note that all bridges participating in the spanning tree network use the root bridge’s Hello
	Interval parameter value. See also Bridge Hello Time.
	Default Value	2 seconds
	Range	1 to 10 seconds
Maximum Age	Indicates the Maximum Age Time parameter value that the root bridge is currently using.
Time	This value specifies the maximum age that a Hello message can attain before it is
	discarded.
	Note that the root bridge’s Maximum Age Time parameter value becomes the actual
	Maximum Age Time parameter value for all bridges participating in the spanning tree
	network. See also Bridge Maximum Age Time.
	Default Value	20 seconds
	Range	6 to 40 seconds

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