User Manual

8-Port or 16-Port Gigabit Smart Managed Pro Switch Model GS418TPP, GS510TLP, and GS510TPP
Configure Switching User Manual173
6. Configure the MST values:
• MST ID. Specify the ID of the MST to create. The valid values for this are 1 to 4094.
This is visible only when the select option of the MST ID select box is selected.
• Priority. 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 you set the priority to any
value between 0 and 4095, the switch automatically sets the value to 0. The default
value is 32768. The valid range is 0–61440.
• VLAN Id.
The menu includes all VLANs that are configured on the switch. Y
ou can
select VLANs that must be associated with the MST instance or clear VLANs that are
already associated with the MST instance.
7. Click the Add button.
The MST is added.
For each configured instance, the information described in the following table displays on the
page.
Table 42. MST configuration
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.
Last TCN The time in day:hour:minute:second format since the topology of the selected
MST instance last changed.
Topology Change Count Number of times that the topology 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 is
either
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 Port Port to access the designated root for this MST instance.