IT Certification

switch>(enable) set spantree backbonefast

Commands to Use for Troubleshooting The Configuration：

show spantree vlan_id - Shows the current state of the spanning tree for the ”vlan_id” entered from the perspective of the switch on which it is entered.

show spantree summary - Provides a summary of connected spanning tree ports by VLAN.

show spantree statistics [...]

I. STP introduce
Spanning-Tree Protocol (STP) is a Layer 2 (L2) protocol designed to run on bridges and switches. The specification for STP is called 802.1d. The main purpose of STP is to ensure that you do not run into a loop situation when you have redundant paths in your network. Loops are deadly to [...]