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 instance_id command to display the
spanning tree configuration for an instance within the Multiple Spanning Tree
(MST).
• For a description of the items displayed under "Spanning-tree information,"
see "Configuring Global Settings" on page 3-128. For a description of the
items displayed for specific interfaces, see "Displaying Interface Settings" on
page 3-132.
Example
Console#show spanning-tree
Spanning-tree information
---------------------------------------------------------------
Spanning tree mode:
Spanning tree enable/disable:
Instance:
Vlans configuration:
Priority:
Bridge Hello Time (sec.):
Bridge Max Age (sec.):
Bridge Forward Delay (sec.):
Root Hello Time (sec.):
Root Max Age (sec.):
Root Forward Delay (sec.):
Max hops:
Remaining hops:
Designated Root:
Current root port:
Current root cost:
Number of topology changes:
Last topology changes time (sec.): 22
Transmission limit:
Path Cost Method:
Spanning Tree Commands
MSTP
enable
0
1-4094
32768
2
20
15
2
20
15
20
20
32768.0.0000ABCD0000
1
10000
1
3
long
4
4-161
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