Chapter 14 Monitor: Spanning Tree
GS1900 Series User’s Guide
97
14.2.4 MST Po rt
Use this screen to view the Switch’s spanning tree MST port status. Click Mo nito r > Spa nning Tre e > MST
Port to access this screen.
Fig ure 99 Monitor > Spanning Tree > MST Port
Each field is described in the following table.
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.
Remaining Hops This field displays the number of remaining hops.
Last Topology
Change
Topology change information is directly propagated throughout the network from the
device that generates the topology change.
Table 46 Monitor > Spanning Tree > MST
LABEL DESCRIPTIO N
Table 47 Monitor > Spanning Tree > MST Port
LABEL DESCRIPTIO N
MST Port
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.
Identifier (Priority /
Port Id)
This field displays the identifier (in priority / port number).
Internal Path
Cost(Operation)
Path cost is the cost of transmitting a frame on to a LAN through that port. It is
recommended to assign this value according to the speed of the bridge. The slower the
media, the higher the cost.
Regional Root Bridge Root bridge refers to the base of the spanning tree.
Internal Root Cost This field displays the internal root cost.
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