How to Configure Cisco Switch as Root Bridge in Cisco Packet Tracer?

How to Configure Cisco Switch as Root Bridge in Cisco Packet Tracer? – Spanning Tree protocol automatically sets port states on Cisco Switches. The STP Protocol handles the BID values when determining the port states of the Switches.
How to Configure Cisco Switch as Root Bridge in Cisco Packet Tracer?

How to Configure Cisco Switch as Root Bridge in Cisco Packet Tracer?

How to Configure Cisco Switch as Root Bridge in Cisco Packet Tracer?

When handling BID values of Spanning Tree Switches, it evaluates Priority and MAC Addresses. In short, the Root Bridge is selected with the Priority + MAC Address = BID formula.

After adding three Cisco Switches to the Cisco Packet Tracer, the Spanning Tree Protocol will automatically set the interface of a Switch to Blocked when we connect all of these Switches with a cross cable. If STP does not block a port, a Loop will occur on the network.

We have mentioned that a Switch Root Bridge between Cisco Switches is automatically selected and that the Root Bridge communicates with other Switches with BPDU packets. When selecting the Root Bridge, priority values of Switches are of great importance. If the Priority value of a Switch is low, then the Switch on the network will definitely be the Root Bridge.

If all the Switches on the network have the same Priority value, the Switch with the lowest MAC address will be selected as the ROOT BRIDGE. But when we are designing an enterprise network, we can easily do this if we want to manually configure Root Bridge of the end switches in the distribution layer.

If we want to manually select the Root Bridge, we look at the priority values of the switches and configure them. When we want to manually set the switch to Root Bridge, it will be set as ROOT BRIDGE if it has the smallest MAC address.

How to Manually Select Cisco Switch as Root Bridge?

Before configuring manually Cisco Switch as Root Bridge in Cisco Packet Tracer, let’s examine the default configuration below.

How to Configure Cisco Switch as Root Bridge in Cisco Packet Tracer?

In the above three Switches network designs, all Switch Priority values are equal and thus the Switch Root Bridge with the smallest MAC address is chosen.

When we apply the show spanning-tree command in SW2 privileged mode, we can check that the following output is the Root Bridge.

Note this bridge is the root output …

[code]
SW2#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address 0003.E44B.4AC0
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0003.E44B.4AC0
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20

Interface Role Sts Cost Prio.Nbr Type
—————- —- — ——— ——– ——————————–
Gi0/1 Desg FWD 4 128.25 P2p
Gi0/2 Desg FWD 4 128.26 P2p

SW2#
[/code]

But what we want is to manually set SW1 as the Root Bridge. Based on the topology above, if you want to manually select the Cisco Switch as the Root Bridge, open the CLI command prompt for that switch and execute the following command.

When determining the priority value, we need to assign a value the multiples of 0 – 4096.

[code]
SW1(config)#spanning-tree vlan 1 priority ?
<0-61440> bridge priority in increments of 4096
SW1(config)#spanning-tree vlan 1 priority 4096
[/code]

Cisco Packet Tracer Root Bridge Konfigürasyonu

In the image above, we can see that Root Bridge Switch is SW1. You can use the show spanning-tree command to verify.

How to Configure Cisco Switch as Root Bridge in Cisco Packet Tracer? ⇒ Video

You can watch how to configure Cisco Switch as Root Bridge in Packet Tracer and you can also subscribe to our YouTube channel…

  Final Word

How to Configure Cisco Switch as Root Bridge in Cisco Packet Tracer? – In this article, we have manually identified a Cisco Switch as the Root Bridge.

If this article is helpful, send me feedback by commenting! Thanks in advance, take care of yourself!

Also, you can add to browser bookmarks by pressing the CTRL+D to read this article later!

Articles Related to How to Configure Cisco Switch as Root Bridge in Cisco Packet Tracer

[su_box title=”Related Articles” box_color=”#242424″ radius=”0″]
♦ How to Install Cisco Packet Tracer 7.1 on Windows 10?
 Understanding Spanning Tree Protocol on Three Cisco Switches in Cisco Packet Tracer
♦ How to Work STP Protocol Between Four Cisco Switches in Cisco Packet Tracer?
♦ How to Configure DHCP Relay Agent in Cisco Packet Tracer?
 How to Recover Cisco Router IOS Using Rommon Mode in Cisco Packet Tracer?
[/su_box]

Products Related to How to Configure Cisco Switch as Root Bridge in Cisco Packet Tracer

[su_box title=”Related Products” box_color=”#242424″ radius=”0″]

[/su_box]

File Related to How to Configure Cisco Switch as Root Bridge in Cisco Packet Tracer

[su_box title=”Related File” box_color=”#242424″ radius=”0″]

You can download the PKT file to your computer from the button below…

[su_button url=”http://bit.ly/SwitchRootBridge” target=”blank” style=”flat” background=”#7ad03a” size=”6″ center=”yes” icon=”icon: cloud-download” icon_color=”#ffffff” text_shadow=”0px 0px 0px #000000″ rel=”nofollow”]Download PKT File[/su_button]

[/su_box]

Add a Comment

Your email address will not be published. Required fields are marked *