Before you begin this task, create or modify a switch template.
By default, STP is disabled. Use this task to toggle it on and configure the
settings. Extreme Networks and Dell EMC recommend you enable STP for
Dell EMC switches.
- Toggle STP (Spanning Tree
Protocol) to ON, and select one of the following modes:
STP:
Uses a single spanning tree without regard to VLANs. After convergence, only
the root bridge sends configuration BPDUs, and other switches only relay
those BPDUs.
RSTP:
Uses a single spanning tree without regard to VLANs. After convergence, all
switches send BPDUs every two seconds in the event of a physical link
failure.
MSTP:
Can map a group of VLANs into a single multiple spanning tree instance
(MSTI). MSTP uses BPDUs to exchange information between spanning-tree
compatible devices, to prevent loops in each MSTI by selecting active and
blocked paths.
- Select the STP Bridge Priority.
Every switch taking part in spanning tree has a bridge priority. The switch
with the lowest priority becomes the root bridge. If there's a tie, the switch
with the lowest bridge ID number wins. The ID number is typically derived from a
MAC address on the switch.
- Set the following parameters for STP Timers:
Forward Delay: The time the switch spends in the
listening and learning state.
Max Age: The maximum time before a bridge port saves
its configuration BPDU information.
| 
