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Configuring Switching Information
152
ProSafe M5300 Switch
To configure an MST instance:
1. To add an MST instance, configure the MST values and click ADD:
• MST ID - Specify the ID of the MST to create. Valid values for this are between 1 and
4094. This is only visible when the select option of the MST ID select box is selected.
• 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 combo box of each VLAN on the switch. These can be
selected or unselected for re-configuring the association of VLANs to MST instances.
2. To delete an MST instance, select the check box next to the instance and click DELETE.
3. To modify an MST instance, select the check box next to the instance to configure, update
the values, and click APPLY. You can select multiple check boxes to apply the same setting
to all selected ports.
4. Click CANCEL to cancel the configuration on the screen and reset the data on the screen to
the latest value of the switch.
For each configured instance, the information described in the following table displays on the
page.
Field Description
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 Topology Change The time n seconds since the topology of the selected MST instance
last changed.
Topology Change Count Number of times topology has changed for the selected MST
instance.
Topology Change The value of the topology change parameter for the switch indicating
if a topology change is in progress on any port assigned to the
selected MST instance. It takes a value if True or False.
Designated Root The bridge identifier of the root bridge. It is made up from the bridge
priority and the base MAC address of the bridge
Root Path Cost Path Cost to the Designated Root for this MST instance.
Root PortIdentifier Port to access the Designated Root for this MST instance.