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| Spanning Tree Commands
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COMMAND USAGE
If at any time the switch detects STP BPDUs, including Configuration or
Topology Change Notification BPDUs, it will automatically set the selected
interface to forced STP-compatible mode. However, you can also use the
spanning-tree protocol-migration command at any time to manually
re-check the appropriate BPDU format to send on the selected interfaces
(i.e., RSTP or STP-compatible).
EXAMPLE
Console#spanning-tree protocol-migration eth 1/5
Console#
show spanning-tree This command shows the configuration for the common spanning tree
(CST), for all instances within the multiple spanning tree (MST), or for a
specific instance within the multiple spanning tree (MST).
SYNTAX
show spanning-tree [interface | mst instance-id | brief |
stp-enabled-only]
interface
ethernet unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-28/52)
port-channel channel-id (Range: 1-16)
instance-id - Instance identifier of the multiple spanning tree.
(Range: 0-4094)
brief - Shows a summary of global and interface settings.
stp-enabled-only - Displays global settings, and settings for
interfaces for which STP is enabled.
DEFAULT SETTING
None
COMMAND MODE
Privileged Exec
COMMAND USAGE
â—† Use the show spanning-tree command with no parameters to display
the spanning tree configuration for the switch for the Common
Spanning Tree (CST) and for every interface in the tree.
â—† Use the show spanning-tree interface command to display the
spanning tree configuration for an interface within the Common
Spanning Tree (CST).
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