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BPDU Handling — Determines how BPDU packets are managed 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 an interface. This is the default value.

Flooding — Floods BPDU packets when spanning tree is disabled on an interface.

Path Cost Default Values — Specifies the method used to assign default path cost to STP ports. The possible field values are:

Short — Specifies 1 through 65,535 range for port path cost. This is the default value.

Long — Specifies 1 through 200,000,000 range for port path cost. The default path cost assigned to an interface varies according to the selected method (Hello Time, Max Age, or Forward Delay).

Bridge Settings

Priority — Specifies the bridge priority value. When switches or 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.The default value is 32768. The port priority value is provided in increments of 4096.

Hello Time — Specifies the device Hello Time. The Hello Time indicates the amount of time in seconds a Root Bridge waits between configuration messages. The default is 2 seconds.

Max Age — Specifies the device Maximum Age Time. The 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 — Specifies the device Forward Delay Time. 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.

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3Com 2924-PWR manual Bridge Settings