Nortel Networks 450 manual Parameter Description Forward Delay, Bridge Hello, Time, Maximum Age

Using the BayStack 450 10/100/1000 Series Switch

Table 3-26. Spanning Tree Switch Settings Parameters (continued)

Parameter	Description
Forward Delay	Indicates the Forward Delay parameter value that the root bridge is currently using. This
	value specifies the amount of time that the bridge ports remain in the Listening and
	Learning states before entering the Forwarding state.
	Note that the root bridge’s Forward Delay parameter value becomes the actual Forward
	Delay parameter value for all bridges participating in the spanning tree network. See also
	Bridge Forward Delay.
	Default Value	15 seconds
	Range	4 to 30 seconds
Bridge Hello	Indicates the Hello Interval (the amount of time between transmissions of BPDUs)
Time	specified by management for this bridge. This parameter takes effect only when this
	bridge becomes the root bridge.
	Note that, although you can set the Hello Interval for a bridge using bridge management
	software, once the spanning tree computation process is complete, all bridges
	participating in the spanning tree network use the root bridge’s Hello Interval parameter
	value. If any bridge becomes the root bridge, its Hello Interval parameter value becomes
	the Actual Hello Interval parameter value for all bridges participating in the spanning tree
	network. See also Hello Time.
	Default Value	2 seconds
	Range	1 to 10 seconds
Bridge	Specifies the maximum age (in seconds) that a Hello message can attain before it is
Maximum Age	discarded. This parameter, specified by management for this bridge, takes effect only
Time	when the bridge becomes the root bridge.
	Note that, if this bridge becomes the root bridge, its Maximum Age Time parameter value
	becomes the Actual Maximum Age Time parameter value for all bridges participating in
	the spanning tree network. See also Maximum Age Time.
	Default Value	20 seconds
	Range	6 to 40 seconds
Bridge Forward	Indicates the Forward Delay parameter value specified by management for this bridge.
Delay	This parameter takes effect only when this bridge becomes the root bridge.
	The Forward Delay parameter value specifies the amount of time that the bridge ports
	remain in the Listening and Learning states before entering the Forwarding state.
	Note that all bridges participating in the spanning tree network use the root bridge’s
	Forward Delay parameter value. See also Forward Delay.
	Default Value	15 seconds
	Range	4 to 30 seconds

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