User manual

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STP Bridge Global Settings
To open the following window, open Spanning Tree in the L2 features folder and click the STP Bridge Global
Settings link.
Figure 7- 14. STP Bridge Global Settings window
The following parameters can be set:
Parameter Description
Spanning Tree Protocol Use the pull-down menu to enable or disable STP globally on the Switch. The default
is Disabled.
Bridge Max Age (6 - 40
Sec)
The Max Age may be set to ensure that old information does not endlessly circulate
through redundant paths in the network, preventing the effective propagation of the
new information. Set by the Root Bridge, this value will aid in determining that the
Switch has spanning tree configuration values consistent with other devices on the
bridged LAN. If the value ages out and a BPDU has still not been received from the
Root Bridge, the Switch will start sending its own BPDU to all other switches for
permission to become the Root Bridge. If it turns out that your switch has the lowest
Bridge Identifier, it will become the Root Bridge. The user may choose a time
between 6 and 40 seconds. The default value is 20.
Bridge Hello Time (1 - 10
Sec)
The Hello Time can be set from 1 to 10 seconds. This is the interval between two
transmissions of BPDU packets sent by the Root Bridge to tell all other switches that it
is indeed the Root Bridge.
Bridge Forward Delay (4 -
30 Sec)
The Forward Delay can be from 4 to 30 seconds. Any port on the Switch spends this
time in the listening state while moving from the blocking state to the forwarding
state.
Bridge Priority (0-6144) Used to specify the priority level of the STP Brigde. The bridge priority can be set
from 0 to 6144.