User Manual

M4300 Intelligent Edge Series Fully Managed Stackable Switches
Configure Switching Information User Manual227
View the Spanning Tree MST Port Status
You can configure and display Multiple Spanning Tree (MST) settings on a specific port on
the switch.
A port can become Diagnostically Disabled (D-Disable) when DOT1S experiences a severe
error condition. The most common cause is when the DOT1S software experiences BPDU
flooding. The flooding criteria is such that DOT1S receives more than 15 BPDUs in a
3-second interval. The other causes for DOT1S D-Disable are extremely rare.
To view the Spanning Tree MST port status:
1. Launch a web browser
.
2. In the address field of your web browser
, enter the IP address of the switch.
The login window opens.
3. Enter admin as the user name, enter your local device password,
and click the Login
button.
The first time that you log in, no password is required. However, you then must specify a
local device password to use each subsequent time that you log in.
The System Information page displays.
4. Select Switching > STP >
Advanced > MST Port Status.
Note: If no MST instances were configured on the switch, the page displays
a No MSTs Available message and does not display the fields shown
in the field description table that follows.
Root Path Cost Path Cost to the Designated Root for this MST instance.
Root PortIdentifier Port to access the Designated Root for this MST instance.
Table 79. MST Configuration (continued)
Field Description