Chapter 19
| Spanning Tree Commands
– 524 –
spanning-tree This command enables the Spanning Tree Algorithm globally for the switch. Use
the no form to disable it.
Syntax
[no] spanning-tree
Default Setting
Spanning tree is enabled.
Command Mode
Global Configuration
spanning-tree
loopback-detection
Enables BPDU loopback detection for a port IC
spanning-tree loopback-
detection action
Configures the response for loopback detection to block
user traffic or shut down the interface
IC
spanning-tree loopback-
detection release-mode
Configures loopback release mode for a port IC
spanning-tree
loopback-detection trap
Enables BPDU loopback SNMP trap notification for a port IC
spanning-tree mst cost Configures the path cost of an instance in the MST IC
spanning-tree
mst port-priority
Configures the priority of an instance in the MST IC
spanning-tree
port-bpdu-flooding
Floods BPDUs to other ports when global spanning tree is
disabled
IC
spanning-tree port-priority Configures the spanning tree priority of an interface IC
spanning-tree root-guard Prevents a designated port from passing superior BPDUs IC
spanning-tree
spanning-disabled
Disables spanning tree for an interface IC
spanning-tree tc-prop-stop Stops propagation of topology change information IC
spanning-tree
loopback-detection release
Manually releases a port placed in discarding state by
loopback-detection
PE
spanning-tree
protocol-migration
Re-checks the appropriate BPDU format PE
show spanning-tree Shows spanning tree configuration for the common
spanning tree (i.e., overall bridge), a selected interface, or
an instance within the multiple spanning tree
PE
show spanning-tree
mst configuration
Shows the multiple spanning tree configuration PE
show spanning-tree tc-prop Shows configuration of topology change propagation
domains
PE
Table 95: Spanning Tree Commands (Continued)
Command Function Mode
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