S
PANNING
T
REE
C
OMMANDS
4-183
spanning-tree
This command enables the Spanning Tree Algorithm globally for the
switch. Use the no form to disable it.
Syntax
[no] spanning-tree
Default Setting
Spanning tree is enabled.
Command Mode
Global Configuration
Command Usage
The Spanning Tree Algorithm (STA) can be used to detect and disable
network loops, and to provide backup links between switches, bridges
or routers. This allows the switch to interact with other bridging
devices (that is, an STA-compliant switch, bridge or router) in your
network to ensure that only one route exists between any two stations
on the network, and provide backup links which automatically take over
when a primary link goes down.
Example
This example shows how to enable the Spanning Tree Algorithm for the
switch:
spanning-tree
protocol-migration
Re-checks the appropriate BPDU format PE 4-195
show spanning-tree Shows spanning tree configuration for
the common spanning tree (i.e., overall
bridge) or a selected interface
PE 4-195
Console(config)#spanning-tree
Console(config)#
Table 4-50 Spanning Tree Commands
Command Function Mode Page
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