Mst Settings - ZyXEL Communications GS1900 Series User Manual

Table 45 Monitor > Spanning Tree > CIST Port (continued)
LABEL
Internal Path Cost
Operation
Designated Root
Bridge
External Root Cost
Regional Root
Bridge
Internal Root Cost
Designated Bridge
Edge Port
Operation
P2P MAC
Operation
Port Role
Port State

14.2.3 MST Settings

Use this screen to view the Switch's spanning tree MST instance. Click Monitor > Spanning Tree > MST to
access this screen.
Figure 112 Monitor > Spanning Tree > MST
Each field is described in the following table.
Table 46 Monitor > Spanning Tree > MST
LABEL
MST Instance
MST ID
State
Regional Root Bridge
Internal Root Cost
Designated Bridge
Chapter 14 Monitor: Spanning Tree
DESCRIPTION
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 external root cost.
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.
An edge port changes its initial STP port state from blocking state to forwarding state
immediately without going through listening and learning states right after the port is
configured as an edge port or when its link status changes.
This field displays the state of the P2P MAC operation.
This field displays the state of the port role.
This field displays the state of the port.
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.
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