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DES-3326 Layer 3 Fast Ethernet Switch User’s Guide
Figure 6-72. Configure Spanning Tree - Global
The Spanning Tree Protocol (STP) operates on two levels: on the switch level, the settings are globally
implemented. On the port level, the settings are implemented on a per user-defined Group basis.
The factory default setting should cover the majority of installations. It is
advisable to keep the default settings as set at the factory; unless, it is absolutely
necessary to change them.
The following fields can be set:
Parameter Description
Status:<Enabled> This field can be toggled between Enabled and Disabled using the
space bar. This will enable or disable the Spanning Tree Protocol
(STP), globally, for the switch.
STP
Group:<Default>
This field can be toggled using the space bar to select any of the STP
groups that have been configured on the switch.
Max. Age: [ ]
The Max. Age can be set from 6 to 40 seconds. At the end of the Max.
Age, if a BPDU has still not been received from the Root Bridge, your
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.
Hello Time:[ ]
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.
Forward Delay:[ ]
The Forward Delay can be from 4 to 30 seconds. This is the time any
port on the Switch spends in the listening state while moving from the
blocking state to the forwarding state.
Priority:[ ]
A Priority for the switch can be set from 0 to 65535. This number is
used in the voting process between switches on the network to
determine which switch will be the root switch. A low number
indicates a high priority, and a high probability that this switch will
be elected as the root switch.
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