Chapter 13 Monitor: Spanning Tree
GS1900 Series User’s Guide
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Each field is described in the following table.
13.2.4 MST Port
Use this screen to view the Switch’s spanning tree MST port status. Click Monitor > Spanning
Tree > MST Port to access this screen.
Figure 61 Monitor > Spanning Tree > MST Port
Each field is described in the following table.
Table 43 Monitor > Spanning Tree > MST
LABEL DESCRIPTION
MST ID This is the unique identifier for this MST.
Select a number from the drop-down menu to display results.
State This field displays the state.
Regional Root
Bridge
Root bridge refers to the base of the spanning tree.
Internal Root Cost This field displays the internal root cost.
Designated Bridge For each LAN segment, a designated bridge is selected. This bridge has the lowest cost
to the root among the bridges connected to the LAN.
Root Port On each bridge, the bridge communicates with the root through the root port. The root
port is the port on this Switch with the lowest path cost to the root (the root path cost).
If there is no root port, then this Switch has been accepted as the root bridge of the
spanning tree network.
Remanining Hops This field displays the number of remanining hops.
Last Topology
Change
Topology change information is directly propagated throughout the network from the
device that generates the topology change.
Table 44 Monitor > Spanning Tree > MST Port
LABEL DESCRIPTION
MST ID This is the unique identifier for this MST.
Select a number from the drop-down menu to display results.
Port This field displays the port number.
MSTI ID A VLAN can be mapped to a specific Multiple Spanning Tree Instance (MSTI). MSTI
allows multiple VLANs to use the same spanning tree.
