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Loop guard and Root guard work together

wfqk
Level 5
Level 5

Hi Loop guard and Root guard can work together? Anyone can explain it? Thank you

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Hello @wfqk

 

No. According to Cisco docs, they are "mutually exclusive" which means that they can´t happen at the same time.

"The root guard is mutually exclusive with the loop guard. The root guard is used on designated ports, and it does not allow the port to become non-designated. The loop guard works on non-designated ports and does not allow the port to become designated through the expiration of max_age. The root guard cannot be enabled on the same port as the loop guard. When the loop guard is configured on the port, it disables the root guard configured on the same port."

 

For you reference:

https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/10596-84.html#loop_guard_vs_uld

 

-If I helped you somehow, please, rate it as useful.-