Allied-telesis AT-S95 CLI Manual de usuario Pagina 263

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Spanning-Tree Commands
Page 263
Default Configuration
The default setting is flooding.
Command Modes
Global Configuration mode
User Guidelines
There are no user guidelines for this command.
Example
The following example defines BPDU packet flooding when the spanning-tree is disabled on an interface.
spanning-tree guard root
The spanning-tree guard root Interface Configuration (Ethernet, port-channel) mode command enables root
guard on all spanning tree instances on the interface. Root guard prevents the interface from becoming the root
port of the device. Use the no form of this command to disable root guard on the interface.
Syntax
spanning-tree guard root
no spanning-tree guard root
Parameters
This command has no arguments or keywords.
Default Configuration
Root guard is disabled.
Command Mode
Interface Configuration (Ethernet, port-channel) mode
User Guidelines
Root guard can be enabled when the device operates in STP, RSTP and MSTP.
When root guard is enabled, the port changes to the alternate state if spanning-tree calculations selects the port
as the root port.
Example
The following example prevents Ethernet port 1/e1 from being the root port of the device.
console(config)# spanning-tree bpdu flooding
console(config) # interface ethernet 1/e1
console(config-mst) # spanning-tree guard root
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