D-Link DWS-4026 User Manual page 249

Software User Manual
12/10/09
Table 151: Spanning Tree CST Configuration/Status Fields (Cont.)
Field
Bridge Hello Time (secs)
Bridge Forward Delay (secs)
Spanning Tree Maximum Hops Specifies the maximum number of bridge hops the information for a particular CST
BPDU Guard
BPUD Filter
Spanning Tree Tx Hold Count
Bridge Identifier
Time Since Topology Change
Topology Changes Counts
Topology Change
Designated Root
Root Path Cost
Root Port
Max Age
Forward Delay
Hold Time
CST Regional Root
CST Path Cost
Document 34CSFP6XXUWS-SWUM100-D7
Description
Specifies the switch Hello time, which indicates the amount of time in seconds a root
bridge waits between configuration messages. The valid range is 1-10, and the default
value is 2. The value must be less than or equal to (Bridge Max Age / 2) – 1. The
default hello time value is 2.
Specifies the switch forward delay time, which indicates the amount of time in seconds
a bridge remains in a listening and learning state before forwarding packets. The value
must be greater or equal to (Bridge Max Age / 2) + 1. The time range is from 4 seconds
to 30 seconds. The default value is 15.
instance can travel before being discarded.
Enable or disable the BPDU Guard.The switches behind the edge ports that have
BPDU guard enabled will not be able to influence the overall STP topology. Using the
BPDU Guard feature can help enforce the STP domain borders and keep the active
topology be consistent and predictable.
Enable or disable the BPDU Filter. When BPDU filtering is enabled, the port drops the
BPDUs received.
Configure the maximum number of BPDUs the bridge is allowed to send within the
hello time window.The default value is 6.
The bridge identifier for the CST. It is made up using the bridge priority and the base
MAC address of the bridge.
Displays the total amount of time since the last topographic change. The time is
displayed in hour/minute/second format, for example, 5 hours 10 minutes and 4
seconds.
Displays the total amount of STP state changes that have occurred.
Indicates whether a topology change is in progress on any port assigned to the CST.
The possible values are True or False.
Displays the bridge identifier of the root bridge, which is made up from the bridge
priority and the base MAC address of the bridge.
Displays the cost of the path from this bridge to the designated root.
Indicates the root port of the selected instance.
Shows the path Cost to the Designated Root for the CST.
Shows the derived value of the Root Port Bridge Forward Delay parameter.
Indicates the minimum time between transmission of Configuration BPDUs.
Shows the priority and base MAC address of the CST Regional Root.
Shows the path Cost to the CST tree Regional Root.
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Configuring Spanning Tree Protocol Page 249