How to enable Rapid Spanning Tree (RSTP) on Dell Networking Force10 switches

How to enable Rapid Spanning Tree (RSTP) on Dell Networking Force10 switches


This article explains how Rapid Spanning Tree Protocol (RSTP) is implemented on Dell Networking Force10 switches

Topics Covered

  1. Enable RSTP globally
  2. Configuring EdgePort
  3. Set Root Bridge Priority
  4. Verification Commands



Enabling Rapid Spanning Tree Protocol Globally

Enable RSTP globally on all participating bridges; it is not enabled by default. 

When you enable RSTP, all physical and port-channel interfaces that are enabled and in Layer 2 mode are automatically part of the RSTP topology.

  • Only one path from any bridge to any other bridge is enabled.

  • Bridges block a redundant path by disabling one of the link ports.

To enable RSTP globally for all Layer 2 interfaces, use the following commands.

Command Line Example

Command

Purpose

console# configure

Enter configuration level on the switch.

console(config)# protocol spanning-tree rstp

Set the spanning tree protocol type.

console (conf-rstp)# no disable

Turns RSTP on globally for the switch.

console (conf-rstp)# disable

Turns RSTP off globally for the switch.



Configuring an EdgePort

It is recommended to configure any edge ports, ports that go to end devices such as printers, phones, servers, workstations, to be set up as edge-port. A port in edge-port will move directly to forwarding state when the link comes up without going through listening or learning states.

Command Line Example

Command

Purpose

console# configure

Enter configuration level on the switch.

console(config)# interface te 0/1

Enter the desired physical port interface.

console (conf-if-te-0/1)# spanning-tree rstp edge-port

Enables Edge-port on the interface.

console (conf-if-te-0/1)# no spanning-tree rstp edge-port

Disables Edge-port on the interface.

Do not configure EdgePort on interfaces that attach to another switch or network device.

 



Set Root Bridge Priority


RSTP determines the root bridge, but you can assign one bridge a lower priority to increase the likelihood that it is selected as the root bridge.

To change the bridge priority, use the following command.

Assign a number as the bridge priority or designate it as the primary or secondary root.

PROTOCOL SPANNING TREE RSTP mode

bridge-priority

-priority-value The range is from 0 to 61440. The lower the number assigned, the more likely this bridge becomes the root bridge.

The default is 32768. Entries must be multiples of 4096.

Command Line Example

Command

Purpose

Console# configure

Enters configuration level on the switch.

Console(config)# protocol spanning-tree rstp

Set the specific spanning-tree protocol type.

Console(conf-rstp)#bridge-priority 4096

Set bridge priority in increments of 4096 (default = 32768).



Verification & Monitoring commands

ftos#show spanning-tree rstp brief
ftos#show spanning-tree rstp




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Article ID: HOW10377

Last Date Modified: 09/14/2019 12:49 AM


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