User Manual

Table 61. MST interface configuration information
DescriptionField
The path cost that the interface uses.Operational Port Path Cost
Indicates if the path cost is automatically calculated (Enable) or not
(Disable). If enabled, the path cost is calculated based on the link speed
of the port if the configured value for Port Path Cost is zero.
Auto Calculated Port Path Cost
The port identifier for the port in the MST instance, which is created by
using the port priority and the interface number.
Port ID
The time since the counters were cleared.Port Uptime Since Last Clear
Counters
Indicates if STP is enabled for the interface.Port Mode
Indicates the current STP state of the interface. If enabled, the port state
determines what forwarding action is taken on traffic. Possible port states
are as follows:
•
Disabled: STP is currently disabled on the interface. The interface
forwards traffic while learning MAC addresses.
•
Blocking: The interface is currently blocked and cannot be used to
forward traffic or learn MAC addresses.
•
Listening: The interface is currently in the listening mode. The interface
cannot forward traffic nor can it learn MAC addresses.
•
Learning: The interface is currently in the learning mode. The interface
cannot forward traffic. However, it can learn new MAC addresses.
•
Forwarding: The interface is currently in the forwarding mode. The
interface can forward traffic and learn new MAC addresses
Port Forwarding State
Each MST bridge port that is enabled is assigned a port role for each
spanning tree. The port role is one of the following: Root, Designated,
Alternate, Backup, Master, or Disabled.
Port Role
The bridge identifier of the root bridge, which is created by using the
bridge priority and the base MAC address of the bridge
Designated Root
The path cost offered to the LAN by the designated port.Designated Cost
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