Chapter 17
| Spanning Tree Commands
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â—† 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.
â—† 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
---------------------------------------------------------------
Eth 1/ 1 information
---------------------------------------------------------------
Admin Status : Enabled
Role : Disabled
State : Discarding
External Admin Path Cost : 0
Internal Admin Path Cost : 0
External Oper Path Cost : 100000
Internal Oper Path Cost : 100000
Priority : 128
Designated Cost : 100000
Designated Port : 128.1
Designated Root : 32768.0.0001ECF8D8C6
Designated Bridge : 32768.0.123412341234
Forward Transitions : 4
Admin Edge Port : Disabled
Oper Edge Port : Disabled
Admin Link Type : Auto
Oper Link Type : Point-to-point
Flooding Behavior : Enabled
Spanning-Tree Status : Enabled
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