CCNA Quiz: Spanning Tree Answers: Root ports, designated ports, blocking ports? CCNA | CCNP
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- Опубликовано: 28 авг 2024
- Which switch is the root switch? Which ports are root ports, designated ports and blocking ports in this topology? Can you work it out? This is one of my daily quiz question scenarios. In this video, I give you the answer and explain the solution.
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Follow me on Twitter or LinkedIn if you want to receive daily quiz questions:
Twitter: twitter.com/davidbombal
LinkedIn: www.linkedin.com/in/davidbombal/
Teacher i follow u now i need to talk u acept me thnkz
@@SOMITON Please post questions here.
Hello David, I noticed that you were running IOSv layer 2 switches in this exercise right? Did you put together this with a GNS appliance and then downloaded the IOSv image with your Cisco account? Thank you very much in advance I would love to put together something similar to study labs, again, thank you!
Hey David, thanks so much for the video. Please which command did you use to manually set the MAC addresses of the 5 switches in this topology? And what type of Cisco switch did you use in this video?
instablaster...
The part with the PC in the middle of the link makes it much easier. Thank you!
Thank you! Thank you! Thank you! This is the best explanation for designated ports. The PC in the middle makes it so freaking simple to understand!!!
My Lord, I spent days reading material, going through forums where debate raged and finally your explanation in 10 mins helped me resolve my problem of 2 paths to the root bridge having the same costs resolved and it fits with my spanning-tree layout. Thank you so much for this easy to understand explanation, this tied path cost problem was eating me up inside.
I agree, the PC in the middle does help with the answer. Thanks for the great tip.
Glad it helps Donald
you have summarized 10 lectures knowledge in 1 lecture only, thanks
Take my CCNA in a month. Thank you for breaking it down.
Great trainer with lots of good material.
Thanks very much David. I spent my whole Saturday trying to understand the Designated Port but you finally saved my day. Your videos here and on Udemy are just Awesome.
I have been following your tutorial for three months,your teaching methodology is so unique and profound.....I am from India. I changed my career from Electrical Engineer to become a Network Engineer because I love digital communication stuff rather than bunch of complex circuit operation...I am sharing my story because I just want say to my fellow friends's that identify yourself what you exactly love to do .....everyone makes mistakes in life but you have to learn from those mistakes and keep going to rectifying yourself.....all the best to all.......Thank you Sir.David Bombal.....
this way of teaching surprise me why not all instructors follow that way too easy to grasp things. I believe we need to make things easier not complicated.
Mr. David way of teaching is just great.
That is very helpful Mr.David. Please make more Quiz!
I dont even know what spanning tree protocol is yet, nor did I even understand the letters and numbers for the ports on the switches, but I was still able to learn the concept behind this. Really basic stuff like this encourages me so much. I feel like I'm a regular here hahaha thanks for taking time to upload this David! Just got your ICND1 Udemy course!
Just keep on studying and this stuff will start to make sense. Thanks for your purchase! Make sure you get my Packet Tracer Labs course and ICND2 course - you get them for free as part of your purchase. The Packet Tracer course will really push you and help you prepare for the exam.
I got two of your Packet Tracer courses on Udemy and they really help me to understand a lot.
Thank you.. Simplest explanation ever
Thanks for explaining Designated port
Daivd, excellent tutorial as always. Thank you.
Awesome ... Thanks for this explanation ...
Wonderful explanation I sent this to some of my friends the ones who are studying for their new CCNA 200-301. The PC in the middle was critical to my understanding designated ports.
I listened very closely I will definitely watch again thank you so much mr. Bombal
Perfect explanation
Super explanation, especially how to find DP. Thanks for your effort and time. Wish You all the best.
Easy Explanation. Thanks David.
Thank You so much!
Great spanning tree tutorial. Placing pcs between the switches is a nice way to explain the cost to the root bridge if the connections have similar bandwidth. Thanks for all you do.
Glad you found the video useful :)
Thanks again
Perfect explanation! Thank you!
Good explanation. Thanks for sharing the lab.
Hello David awesome video. Thank you very much for the insight
This was a life saver. Thank you!
Hello David hope you are doing well; The explaining with the PC in the middle made me understood for SW_5 were it has got equal cost link to the Root Bridge; So as per few of my own readings what I can understand is that if we compare the link between SW_3 and SW_5 what can't we put the logic of lowest Bridge ID wins and hence the Gi0/2 port SW_5 becomes Desg. PORT and SW_3 Gi0/2 becomes Blk PORT.
Amazing video Sir.. Love to learn by watching your video.
One humble request, can you please make some videos on network security, firewalls, load balancer for beginners..
Waiting of your kind response..🙂
thank you. Very simple and very informative
You nailed it David best explanation of these concepts ever. I really like the little PC thing to get the DP. Thanks
Thank you!
my real ccna teacher devid
I hope to meet u one day if i live
TOP
Again awesome one..👍
Hi David, Nice explanation to capture STP. However, I am a little bit confused regarding designated port explanation by putting a PC on the interface.
everything is very very clear thank you for that but the last part in which you choose the nondesignated port was not clear for me for example why we didn't choose g0/1 of s5 as blocking port what I mean is what is the technique that I have to follow to decide which ports of mine I have to block in case of s5 because even if we used the pc in the middle technique it still the same path cost for both of s5 ports g0/1 and g0/2
AWESOMEEE.........
Helal
How is that S5's port Gi0/1 the root port when S3 has the lowest priority and Mac address ? Shouldn't it be Gi0/2 on S5 since that is the closest port to S3 which like i said again is because S3's priority and MAC is lower than that of S4 ?
How did you get these clean looking icons for the routers and switches?
This video shows you how: ruclips.net/video/51zaAHhdgzQ/видео.html
Now the only thing that confuses me is if you were to add a 10GB link between S5 and S2...
Its not clear for me, why the S2 is the Root Bridge? Through priority we can not determine who is RB so going we are through the lowest MAC address. In this topology the S1 have the lowest MAC address as I can see. Probably something I am missing.
You're right about SW1 having the lowest MAC address, but it's priority is higher than every other switch on the network. This immediately disqualifies it to be the root bridge. (I feel like this is the thing you were missing), but here's the rest anyways -
After that, we only have SW2, SW3, SW4, and SW5. To you're point, they those switches have the same priority, so this is where we consider the MAC addresses.
SW1 no longer matters. It's priority was too high, so it's MAC address is irrelevant right now. Of all the switches with the lowest priority, we have to pick which of those switches has the lowest MAC address. Of the remaining switches, SW2 has the lowest MAC address.
Since SW2 has the lowest priority value mixed with the lowest MAC address, it becomes the root bridge.
Hopefully I wasn't too late to help
Is "cost" the amount of time for which data takes to arrive at a specific location in a network?
Set cost based on link speed. See here: en.wikipedia.org/wiki/Spanning_Tree_Protocol
I like how he said, "Keep the Maths simple or keep the math simple." He knows how ornery us Americans can get lol
Mstp lab pls upload
Is there a way to find a blocking port as u showed us the way to find the root, RT and Dp, cause u ended the tutorial by telling us the blocking port no idea how u chose that one as a blocking port
All ports not selected as Root ports or designated ports go blocking. Have a look at this: www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/5234-5.html
Dennis Rwechungura We will only determine the blocking port after we have assigned all the RP & DP. The one without any RP & RP assigned will be the blocking port.
Thank u guys, i got that one