User Manual

24-Port Gigabit (Hi-Power) PoE+ Ethernet Smart Managed Pro Switch with 2 SFP Ports
Configure Switching User Manual165
Configure the CST port settings
You can configure Common Spanning Tree (CST) and Internal Spanning Tree 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 are such that DOT1S receives more than 15 BPDUs in a
3-second interval. The other causes for DOT1S D-Disable are extremely rare.
To configure CST port settings:
1. Connect your computer
to the same network as the switch.
You can use a WiFi or wired connection to connect your computer to the network, or
connect directly to a switch that is off-network using an Ethernet cable.
2. Launch
a web browser.
3. In the address field of your web browser, enter the IP address of the switch.
If you do not know the IP address of the switch, see
Access the switch on-network and
connected to the Internet on page 19 or Access the switch off-network and not
connected to the Internet on page 27.
The Device UI login page displays.
If you did not yet activate your warranty, the Register to activate your warranty page
displays. For more information, see
Register the switch on page 30.
4. Enter one of the following passwords:
• Enter your device admin password.
• If you previously managed the switch through the Insight app or Cloud portal, enter
the Insight network password for the last Insight network locat
ion.
For information about the credentials, see
Credentials for the device UI on page 28.
5. Click the Go
button.
The System Information page displays.
6. Select Switching > STP
> Advanced > CST Port Configuration.