Parameter description, Default configuration, Command mode – Dell POWEREDGE M1000E User Manual

Page 702: User guidelines, Example, Spanning-tree portfast, Syntax, Spanning-tree, Portfast

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Spanning Tree Commands

Parameter Description

Default Configuration

The default bridge priority for IEEE STP is 32768.

Command Mode

Global Configuration mode

User Guidelines

The priority value must be a multiple of 4096. The priority will be set to the

nearest multiple of 4096 if not an exact multiple of 4096.
The switch with the lowest priority is selected as the root of the spanning tree.

Example

The following example configures the spanning tree priority of instance 1 to

4096.

console(config)#spanning-tree mst 1 priority 4096

spanning-tree portfast

Use the spanning-tree portfast command in Interface Configuration mode to

enable PortFast mode. In PortFast mode, the interface is immediately put

into the forwarding state upon linkup, without waiting for the timer to expire.

To disable PortFast mode, use the no form of this command.

Syntax

spanning-tree portfast
no spanning-tree portfast

Parameter

Description

instance-id

ID of the spanning-tree instance. (Range: 1-4094)

priority

Sets the switch priority for the specified spanning-tree instance.

This setting affects the likelihood that the switch is selected as

the root switch. A lower value increases the probability that the

switch is selected as the root switch. (Range: 0-61440)

2CSPC4.XModular-SWUM200.book Page 702 Thursday, March 10, 2011 11:18 AM

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