Users Guide

868 Spanning Tree Protocol
Configuring STP Interface Settings
Use the following commands to configure the STP settings for a specific
interface.
spanning-tree guard
{root | loop | none}
Enable loop guard or root guard (or disable both) on the
interface.
spanning-tree tcnguard Prevent the port from propagating topology change
notifications.
CTRL + Z Exit to Privileged Exec mode.
show spanning-tree
summary
View various spanning tree settings and parameters for the
switch.
Command Purpose
configure Enter global configuration mode.
interface interface Enter interface configuration mode for the specified
interface. The interface variable includes the interface type
and number, for example tengigabitethernet 1/0/3 or port-
channel 4.
A range of interfaces can be specified using the interface
range command. For example, interface range
tengigabitethernet 1/0/8-12 configures interfaces 8, 9, 10,
11, and 12. The range keyword is also valid for LAGs (port-
channels).
spanning-tree disable Disable spanning tree on the port.
spanning-tree port-
priority priority
Specify the priority of the port.
The priority value is used to determine which ports are put
in the forwarding state and which ports are put in the
blocking state. A port with a lower priority value is more
likely to be put into a forwarding state.
spanning-tree cost cost Specify the spanning tree path cost for the port. The
default port cost is 0, which signifies that the cost is
automatically calculated based on port speed.
CTRL + Z Exit to Privileged Exec mode.
Command Purpose