09-10-2020, 03:13 AM
I have a question with QID:AN183 on the ccna exam.
The question is simply which switch becomes the root bridge?
I am give 4 switches, 2 pairs that share the default priority of 32768, and 30000 respectively, and one with a higher mac than the previous. The issue that I have is bridge priority of 30000 is invalid as it is not a multiple of 4096. Since this is an invalid priority I went with the switch with 32768, and the lower mac. This was incorrect stating root bridge election is based on the lowest bridge priority. I agree with that however 30000 is not a valid priority that can be configured which to me is a red flag, and throws out it as an option.
The clarification that I'm looking for is if we know what cisco's stance on this would be, as this would be a potential gotcha.
The question is simply which switch becomes the root bridge?
I am give 4 switches, 2 pairs that share the default priority of 32768, and 30000 respectively, and one with a higher mac than the previous. The issue that I have is bridge priority of 30000 is invalid as it is not a multiple of 4096. Since this is an invalid priority I went with the switch with 32768, and the lower mac. This was incorrect stating root bridge election is based on the lowest bridge priority. I agree with that however 30000 is not a valid priority that can be configured which to me is a red flag, and throws out it as an option.
The clarification that I'm looking for is if we know what cisco's stance on this would be, as this would be a potential gotcha.