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Software User Manual
12/10/09
Field
Description
MST ID
This is only visible when Create is selected from the MST field drop-down menu. The ID of the MST
being created. Valid values for this are between 1 and 4094.
Priority
Specifies the bridge priority value for the MST. 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 bridge priority is a multiple of 4096. If you specify a priority that is not a multiple of
4096, the priority is automatically set to the next lowest priority that is a multiple of 4096. For example
if the priority is attempted to be set to any value between 0 and 4095, it will be set to 0. The default
priority is 32768.The valid range is 0-61440.
VLAN ID
This gives a list box of all VLANs on the switch. The VLANs associated with the MST instance which
is selected are highlighted on the list. These can be selected or unselected for reconfiguring the
association of VLANs to MST instances.
Bridge Identifier
The bridge identifier for the selected MST instance. It is made up using the bridge priority and the
base MAC address of the bridge.
Time Since
Displays the total amount of time since the last topographic change. The time is displayed in hour/
Topology
minute/second format, for example, 5 hours 10 minutes and 4 seconds.
Change
Topology
Displays the total number of MST state changes that have occurred.
Changes Counts
Topology
Indicates whether a topology change is in progress on any port assigned to the CST. The possible
Change
values are True or False.
Designated Root
Displays the bridge identifier of the root bridge, which is made up from the bridge priority and the
base MAC address of the bridge.
Root Path Cost
Displays the path cost to the Designated Root for this MST instance.
Root Port
Indicates the port to access the Designated Root for this MST instance.
•
If you make any configuration changes, click Submit to apply the new settings to the switch.
•
Click Force to force the port to send out 802.1w or 802.1D BPDUs.
•
Click Refresh to update the screen with most recent data.
Document
34CSFP6XXUWS-SWUM100-D7
Table 152: Spanning Tree MST Configuration/Status
D-Link Unified Access System
Configuring Spanning Tree Protocol
Page 251
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