3Com 3CRUS2475 User Manual page 223

Classic STP — Enables Classic STP on the device. This is the default
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value.
Rapid STP — Enables Rapid STP on the device.
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Multiple STP — Enables Multiple STP on the device.
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BPDU Handling — Determines how BPDU packets are managed
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when STP is disabled on the port or device. BPDUs are used to
transmit spanning tree information. The possible field values are:
Filtering — Filters BPDU packets when spanning tree is disabled on
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an interface. This is the default value.
Flooding — Floods BPDU packets when spanning tree is disabled
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on an interface.
Path Cost Default Values — Specifies the method used to assign
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default path cost to STP ports. The possible field values are:
Short — Specifies 1 through 65,535 range for port path cost. This
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is the default value.
Long — Specifies 1 through 200,000,000 range for port path cost.
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The default path cost assigned to an interface varies according to
the selected method (Hello Time, Max Age, or Forward Delay).
Bridge Setting Parameters
Priority — Specifies the bridge priority value. When switches or
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bridges are running STP, each is assigned a priority. After exchanging
BPDUs, the device with the lowest priority value becomes the Root
Bridge. The field range is 0-61440
port priority value is provided in increments of 4096.
Hello Time (1-10) — Specifies the device Hello Time. The Hello Time
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indicates the amount of time in seconds a Root Bridge waits between
configuration messages. The default is 2 seconds.
Max Age (6-40) — Specifies the device Maximum Age Time. The
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Maximum Age Time is the amount of time in seconds a bridge waits
before sending configuration messages. The default Maximum Age
Time is 20 seconds.
Forward Delay (4-30) — Specifies the device Forward Delay Time.
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The Forward Delay Time is the amount of time in seconds a bridge
remains in a listening and learning state before forwarding packets.
The default is 15 seconds.
Designated Root Parameters
Configuring Classic Spanning Tree
.
The default value is 32768. The
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