User Manual

Configure Switching Information
160
M4100 Series Managed Switch
The following table describes the read-only MST port configuration information displayed on
the Spanning Tree MST Configuration screen.
Table 48. MST Port Status
Field Description
Auto Calculated Port Path Cost Displays whether the path cost is automatically calculated (Enabled) or
not (Disabled). Path cost is calculated based on the link speed of the
port if the configured value for Port path cost is zero.
Port ID The port identifier for the specified port within the selected MST
instance. It is made up from the port priority and the interface number of
the port.
Port Uptime Since Last Clear
Counters
Time since the counters were last cleared, displayed in Days, Hours,
Minutes, and Seconds.
Port Mode Spanning Tree Protocol Administrative Mode associated with the port
or port channel.
The possible values are Enable or Disable.
Port Forwarding State The Forwarding State of this port.
Port Role Each MST bridge port that is enabled is assigned a Port Role for each
spanning tree.
The port role is one of the following values: root port,
designated port, alternate port, backup port, master port or disabled
Port.
Designated Root Root bridge for the selected MST instance. It is made up using the
bridge priority and the base MAC address of the bridge.
Designated Cost Path cost offered to the LAN by the designated port.
Designated Bridge Bridge identifier of the bridge with the designated port. It is made up
using the bridge priority and the base MAC address of the bridge.
Designated Port Port Identifier on the designated bridge that offers the lowest cost to the
LAN. It is made up from the port priority and the interface number of the
port.
View Spanning Tree Statistics
You can view information about the number and type of bridge protocol data units (BPDUs)
transmitted and received on each port.
 To view Spanning Tree statistics:
1. Prepare your computer with a static IP address in the 169.254.100.0 subnet, for
example, 169.254.100.201.
2. Connect an Ethernet cable from an Ethernet port on your computer to an Ethernet port on
the switch.
3. Launch a web browser
.
4. Enter the IP address of the switch in the web browser address field.
The default IP address of the switch is 169.254.100.100.