Brocade 6910 Ethernet Access Switch Diagnostic Guide (Supporting R2.2.0.0) - Manual (Page 36)

26 Brocade 6910 Ethernet Access Switch Diagnostic Guide
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DRAFT: BROCADE CONFIDENTIAL
Spanning Tree Protocol and derivatives
STP show commands
show spanning-tree
Syntax: show spanning-tree [brief | ethernet unit/port | port-channel channel-id|
stp-enabled-only]
• brief - Shows a brief summary of STP settings for each port.
• ethernet unit/port - Specifies a port within the VLAN for detailed STP information.
• port-channel channel-id - Specifies a trunk within the VLAN for detailed STP information.
• stp-enabled-only - Shows STP settings for the switch and for STP-enabled ports.
This command displays global settings for STP.
Console# show spanning-tree
Spanning Tree Information
---------------------------------------------------------------
Spanning Tree Mode : STP
Spanning Tree Enabled/Disabled : Enabled
Instance : 0
VLANs Configured : 1-4093
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 : 32768.0001ECF8D8C6
Current Root Port : 1
Current Root Cost : 100000
Number of Topology Changes : 2
Last Topology Change Time (sec.): 790
Transmission Limit : 3
Path Cost Method : Long
Flooding Behavior : To VLAN
Cisco Prestandard : Disabled
This command displays detailed STP information (in this instance, for Port 1).
Console# show spanning-tree ethernet 1/1
Eth 1/ 1 Information
--------------------------------------------------------------
Admin Status : Enabled
Role : Root
State : Forwarding
Admin Path Cost : 0
Oper Path Cost : 100000
Priority : 128
Designated Cost : 0
Designated Port : 128.16
Designated Root : 32768.0001ECF8D8C6
Designated Bridge : 32768.0001ECF8D8C6
Forward Transitions : 2
Admin Edge Port : Auto