Dell PowerConnect 5316M User Manual page 224

Classic STP — Enables Classic STP on the switch module. This is the default value.
Rapid STP — Enables Rapid STP on the switch module.
Port Cost Method — Determines the Spanning Tree default path cost method. The possible field
values are:
Short — Specifies 1 through 65535 range for port path costs. This is the default value.
Long — Specifies 1 through 200000000 range for port path costs.
BPDU Handling — Determines how BPDU packets are managed when STP is disabled on the
port or the switch module. 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.
Priority (0-61440, in steps of 4096) — Specifies the bridge priority value. When switches or
bridges are running STP, each is assigned a priority. After exchanging BPDUs, the switch with the
lowest priority value becomes the Root Bridge. The default value is 32768. The bridge priority value
is provided in increments of 4096. For example, 0, 4096, 8192, etc.
Hello Time (1-10) — Specifies the switch module 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 (6-40) — Specifies the switch module Maximum Age Time. The Maximum Age Time
indicates the amount of time in seconds a bridge waits before sending configuration messages. The
default max age is 20 seconds.
Forward Delay (4-30) — Specifies the switch module forward delay time. The Forward Delay Time
indicates the amount of time in seconds a bridge remains in a listening and learning state before
forwarding packets. The default is 15 seconds.
Bridge ID — Identifies the Bridge priority and MAC address.
Root Bridge ID — Identifies the Root Bridge priority and MAC address.
Root Port — The port number that offers the lowest cost path from this bridge to the Root Bridge.
It is significant when the Bridge is not the Root. Zero is indicated in case Ethernet Switch Module
is the root.
Root Path Cost — The cost of the path from this bridge to the root. Zero is indicated in case
Ethernet Switch Module is the root.
Topology Changes Counts — Specifies the total amount of STP state changes that have occurred
since the last reboot.
Last Topology Change — The amount of time that has elapsed since the bridge was initialized or
reset, and the last topographic change occurred. The time is displayed in a day hour minute second
format, for example, 0 days 1 hour 34 minutes and 38 seconds.
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Configuring Switch Module Information