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Command Reference Guide Enable Mode Command Set

show spanning-tree <bridgegroup#>

Use the show spanning-tree command to display the latest spanning-tree calculations, including priority

path cost root path information.

Syntax Description

<bridgegroup#>

*Optional

Display spanning-tree for a specific bridge group.

Default Values

No default value necessary for this command.

Command Modes

# Enable Command Mode

Command History

Release 1.1 Command was introduced

Usage Examples

The following is an example output using the

show spanning-tree

command:

enable

# show spanning-tree

Bridge group 1 is executing the ieee compatible Spanning Tree protocol

Bridge Identifier has priority 32768 address 00:A0:C8:08:CA:A2

Configured hello time 2 max age 20 forward delay 15

Current root has priority 32768 address 00:A0:C8:00:8F:98

Root port is 1 (eth 0/1) cost of root path is 100

Number of topology changes 5 last change occurred 22:31:12 ago

from fr 1.17

Times: hold 1 topology change 35 notification 2

Port 1 (eth 0/1) of Bridge group 1 is forwarding

Port path cost 100 Port priority 128 Port Identifier 128.1.

Designated root has priority 32768 address 00:A0:C8:00:8F:98

Designated bridge has priority 32768 address 00:A0:C8:00:8F:98

Designated port id is 128.1 designated path cost 0

BPDU: sent 0 received 41107

Port 2 (fr 1.16) of Bridge group 1 is down

Port path cost 1302 Port priority 128 Port Identifier 128.2.

Designated root has priority 32768 address 00:A0:C8:00:8F:98

Designated bridge has priority 32768 address 00:A0:C8:08:CA:A2

Designated port id is 128.2 designated path cost 100

BPDU: sent 0 received 0

1 2 ... 120 121 122 123 124 125 126 127 128 129 130 ... 567 568

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