Mst Port - ZyXEL Communications GS1900 Series User Manual

Table 46 Monitor > Spanning Tree > MST
L ABEL
Root Port
Remaining Hops
Last Topology
Change
14.2.4 MST Po rt
Use this screen to view the Switch's spanning tree MST port status. Click
to access this screen.
Po rt
Monitor > Spanning Tree > MST Port
Fig ure 99
Each field is described in the following table.
Table 47 Monitor > Spanning Tree > MST Port
L ABEL

MST Port

MST ID
Port
MSTI ID
Identifier (Priority /
Port Id)
Internal Path
Cost(Operation)
Regional Root Bridge
Internal Root Cost
Chapter 14 Monitor: Spanning Tree
DESC RIPT IO N
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 remaining hops.
Topology change information is directly propagated throughout the network from the
device that generates the topology change.
DESC RIPT IO N
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.
This field displays the identifier (in priority / port number).
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.
Root bridge refers to the base of the spanning tree.
This field displays the internal root cost.
GS1900 Series User's Guide
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MST