White Papers

Table Of Contents
To verify that an interface is in Layer 2 mode and enabled, use the show config command from INTERFACE mode. The bold
lines indicate that the interface is in Layer 2 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 Rapid Spanning Tree Protocol Globally
Enable RSTP globally on all participating bridges; it is not enabled by default.
When you enable RSTP, all physical and port-channel interfaces that are enabled and in Layer 2 mode are automatically part of
the RST topology.
Only one path from any bridge to any other bridge is enabled.
Bridges block a redundant path by disabling one of the link ports.
To enable RSTP globally for all Layer 2 interfaces, use the following commands.
1. Enter PROTOCOL SPANNING TREE RSTP mode.
CONFIGURATION mode
protocol spanning-tree rstp
2. Enable RSTP.
PROTOCOL SPANNING TREE RSTP mode
no disable
To disable RSTP globally for all Layer 2 interfaces, enter the disable command from PROTOCOL SPANNING TREE RSTP
mode.
To verify that RSTP is enabled, use the show config command from PROTOCOL SPANNING TREE RSTP mode. The bold line
indicates that RSTP is enabled.
DellEMC(conf-rstp)#show config
!
protocol spanning-tree rstp
no disable
DellEMC(conf-rstp)#
694
Rapid Spanning Tree Protocol (RSTP)