Layer 2 Configuration – STP (Spanning Tree Protocol)

Manage STP

Selecting Manager → Layer 2 → Manage STP displays the Manage STP dashboard with a list of any existing STP settings.

UNUM provides access to specific feature help documentation via the Help Button  icon.


Select the desired Fabric from the left side navigation bar and the dashboard updates showing all STP configurations from all switches within the Fabric.


Note: If no entries exist a "No Data Exists" message is displayed. You must first configure an entry on a switch. Prerequisite settings and configuration may be required.



The dashboard displays a list of existing STP entries by Switch. Additional parameters include: enable, stp-mode, bridge-id, bridge priority, hello-time, forwarding-delay and max-age.

You sort the list of entries in the dashboard using the up / down  arrows above each of the columns to sort the information as needed.




Manager Spanning Tree Protocol Fabric


Selecting an individual Switch from the fabric updates the dashboard with only the STP settings for that switch.


The dashboard displays a list of existing STP entries. Parameters include: enable, stp-mode, bridge-id, bridge priority, hello-time, forwarding-delay and max-age.


You sort the list of entries in the dashboard using the up / down  arrows above each of the columns to sort the information as needed.



Manager Spanning Tree Protocol Switch


To obtain detailed information about the STP click on an entry in the dashboard.

A Details pane opens displaying the configuration information about the STP.

Click X to close the viewing pane.


STP Details Viewing Pane


You modify an entry using the Edit function by selecting the Cog  icon.

To modify a STP click the Edit icon to make changes to the STP parameters which include:

  • stp-mode – STP mode
  • bridge-id – STP bridge ID
  • bridge priority – STP bridge priority - default value of 32769
  • hello-time – STP hello time between 1 and 10 secs - default 2
  • forwarding delay – STP forwarding delay between 4 and 30 secs - default 15
  • max-age – Maximum age time between 6 and 40 secs - default 20


Select the Enable check box to enable or disable the STP.

Modify STP Parameters


Additional field parameters are modified by clicking on the  icon for Additional Fields. Enter the parameter settings for:

  • mst-max-hops –  Maximum hop count for mst bpdu - default 20
  • mst-config-name –  Name for MST Configuration Instance
  • root-guard-wait-time – Wait time for root guard – default 20. Enter 0 to disable. Max time is 300 seconds.


Select the bpdus-bridge-ports (BPDU packets to bridge specific port) checkbox to enable BPDU packets.

Modify STP Parameters Additional Fields


Click Save to continue or Cancel to return to the previous screen without saving any changes.