Nortel BayStack 450 Using Manual page 206

Using the BayStack 450 10/100/1000 Series Switch
Table 3-26. Spanning Tree Switch Settings Parameters
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
Range
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
Range
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
Range
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
Range
3-74
15 seconds
4 to 30 seconds
2 seconds
1 to 10 seconds
20 seconds
6 to 40 seconds
15 seconds
4 to 30 seconds
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