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User’s Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P
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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 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
3-152. For a description of the items displayed for specific interfaces, see “Displaying Interface Settings” on page 3-156.
Example
Console#show spanning-tree
Spanning-tree information
Spanning tree mode: MSTP
Spanning tree enable/disable: enable
Instance: 0
Vlans configuration: 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: 32768.0.0000ABCD0000
Current root port: 1
Current root cost: 10000
Number of topology changes: 1
Last topology changes time (sec.): 22
Transmission limit: 3
Path Cost Method: long
Eth 1/ 1 information