Mst Port - ZyXEL Communications GS1900 Series User Manual

Each field is described in the following table.
Table 44 Monitor > Spanning Tree > MST
LABEL
MST ID
State
Regional Root
Bridge
Internal Root Cost
Designated Bridge
Root Port
Remanining Hops
Last Topology
Change

14.2.4 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 78 Monitor > Spanning Tree > MST Port
Each field is described in the following table.
Table 45 Monitor > Spanning Tree > MST Port
LABEL
MST ID
Port
MSTI ID
Chapter 14 Monitor: Spanning Tree
DESCRIPTION
This is the unique identifier for this MST.
Select a number from the drop-down menu to display results.
This field displays the state.
Root bridge refers to the base of the spanning tree.
This field displays the internal root cost.
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.
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.
This field displays the number of remanining hops.
Topology change information is directly propagated throughout the network from the
device that generates the topology change.
DESCRIPTION
This is the unique identifier for this MST.
Select a number from the drop-down menu to display results.
This field displays the port number.
A VLAN can be mapped to a specific Multiple Spanning Tree Instance (MSTI). MSTI
allows multiple VLANs to use the same spanning tree.
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