Chapter 18
| Spanning Tree Commands
– 456 –
stp-enabled-only
- Displays global settings, and settings for interfaces for
which STP is enabled.
Default Setting
None
Command Mode
Privileged Exec
Command Usage
◆
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.
◆
Use the
show spanning-tree
interface command to display the spanning tree
configuration for an interface within the Common Spanning Tree (CST).
◆
Use the
show spanning-tree mst
command to display the spanning tree
configuration for all instances within the Multiple Spanning Tree (MST),
including global settings and settings for active interfaces.
◆
Use the
show spanning-tree mst
instance-id command to display the
spanning tree configuration for an instance within the Multiple Spanning Tree
(MST), including global settings and settings for all interfaces.
Example
Console#show spanning-tree
Spanning Tree Information
---------------------------------------------------------------
Spanning Tree Mode : MSTP
Spanning Tree Enabled/Disabled : Enabled
Instance : 0
VLANs Configured : 1-4094
Priority : 32768
Bridge Hello Time (sec.) : 2
Bridge Max. Age (sec.) : 20
Bridge Forward Delay (sec.) : 15
Root Hello Time (sec.) : 2
Root Max. Age (sec.) : 20
Root Forward Delay (sec.) : 15
Max. Hops : 20
Remaining Hops : 20
Designated Root : 32768.0.0001ECF8D8C6
Current Root Port : 21
Current Root Cost : 100000
Number of Topology Changes : 5
Last Topology Change Time (sec.): 11409
Transmission Limit : 3
Path Cost Method : Long
Flooding Behavior : To VLAN
Cisco Prestandard : Disabled
---------------------------------------------------------------
Eth 1/ 1 Information
---------------------------------------------------------------
Admin Status : Enabled
Role : Disabled
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