Mst - ZyXEL Communications GS1900-8 User Manual

Each field is described in the following table.
Table 43 Monitor > Spanning Tree > CIST Port
LABEL
Port
Indentifier
(Priority / Port Id)
External Path Cost
Operation
Internal Path Cost
Operation
Designated Root
Bridge
External Root Cost This field displays the 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

Use this screen to view the Switch's spanning tree MST instance. Click Monitor > Spanning Tree
> MST to access this screen.
Figure 77 Monitor > Spanning Tree > MST
Chapter 14 Monitor: Spanning Tree
DESCRIPTION
This field displays the port number.
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.
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.
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.
GS1900 Series User's Guide
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