Administrator Guide

1. If the interface has been assigned an IP address, remove it.
INTERFACE mode
no ip address
2. Place the interface in Layer 2 mode.
INTERFACE
switchport
3. Enable the interface.
INTERFACE mode
no shutdown
To verify that an interface is in Layer 2 mode and enabled, use the show config command from INTERFACE mode.
DellEMC(conf-if-gi-1/1)#show config
!
interface GigabitEthernet 1/1
no ip address
switchport
no shutdown
DellEMC(conf-if-gi-1/1)#
Enabling Spanning Tree Protocol Globally
Enable the spanning tree protocol globally; it is not enabled by default.
When you enable STP, all physical, VLAN, and port-channel interfaces that are enabled and in Layer 2 mode are automatically part of the
Spanning Tree topology.
• Only one path from any bridge to any other bridge participating in STP is enabled.
• Bridges block a redundant path by disabling one of the link ports.
Figure 118. Spanning Tree Enabled Globally
To enable STP globally, use the following commands.
1. Enter PROTOCOL SPANNING TREE mode.
794
Spanning Tree Protocol (STP)