Category: Networking

Disabling Spanning-tree in Cisco switches

At work faced very bad problem when after installation in Cisco Catalyst WS-C3750G-12S-S server as the gateway, all Cisco switches disappeared from the network. The problem is the spanning-tree Protocol. By default, it is enabled in all Cisco switches. To solve this problem, you need to disable it in the "enable" mode. After switching to configuration mode (configure terminal):

spanning mode rapid
no span vlan 1 #I have only one VLAN on this I choose vlan 1, you choose your VLAN

To see the status:

show spanning-tree active detail
show spanning-tree summary

Next, you need to save the configuration.