To enable Spanning Tree Protocol (STP) Bridge Assurance on all network ports on the switch, use the spanning-tree bridge assurance command. To disable Bridge Assurance, use the no form of this command.
spanning-tree bridge assurance
no spanning-tree bridge assurance
This command has no arguments or keywords.
Enabled
Global configuration mode
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Release
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Modification
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4.1(3)
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This command was introduced.
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You can use Bridge Assurance to protect against certain problems that can cause bridging loops in the network.
Note Bridge Assurance is supported only by Rapid per VLAN Spanning Tree Plus (Rapid PVST+) and Multiple Spanning Tree (MST). Legacy 802.1D spanning tree does not support Bridge Assurance.
Bridge Assurance is enabled by default and can only be disabled globally.
Bridge Assurance is enabled globally by default but is disabled on an interface by default. You can enable Bridge Assurance on an interface by using the spanning-tree port type network command.
For more information on Bridge Assurance, see the Cisco Nexus 5000 Series NX-OS Layer 2 Switching Configuration Guide .
This command does not require a license.
This example shows how to enable Bridge Assurance globally on the switch:
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Command
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Description
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show spanning-tree bridge
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Displays the status and configuration of the local Spanning Tree Protocol (STP) bridge.
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spanning-tree port type network
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Configures an interface as a network spanning tree port.
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