cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
638
Views
0
Helpful
2
Replies

Spanning-tree guard root

kian_hong2000
Level 1
Level 1

I have a non-cisco application connected to a 6500 server farm switch port gi0/2.

I notice that if this command "Spanning-tree guard root" is not in the interface, it will not work.

What is the reason behind when this application is not going to be elect as the root bridge work only when putting this command?

2 Replies 2

andrew.prince
Level 10
Level 10

Kianhong,

What type of device is connected to the switch port gi 0/2 ??

bvsnarayana03
Level 5
Level 5

This command basically protects existing network spanning-tree topology. Usually if you connect a swicth lower bridgeid to a port, it will become root & thus alter the entire spanning-tree topology. Root guard command when applied to a port avoids the new device with lower bridge from becoming spaning-tree root.

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Innovations in Cisco Full Stack Observability - A new webinar from Cisco