CCNA Quiz: Spanning Tree Explained: Which ports are blocked and why? CCNA | CCNP
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- Опубликовано: 3 мар 2019
- Which ports are blocked by Spanning Tree in this topology? Which ports are root ports, designated ports? 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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Hi David, as usual, video was great. Minor correction: At the last segment of video, blocked ports are defined with DP (red color) , which should be BP. It is typo error, which may be confuse some. Cheers.
Thanks! Missed that :(
Got my CCNA 200-125 today thanks to your Udemy course and your troubleshooting videos. Thanks alot David! Wish you all the very best!
Congratulations! That is fantastic news!
I struggled for a while understanding spanning tree protocol but this video cleared it all up. Makes total sense now. Thank you, David!
Thank you very much. Mr.David. Please more quiz and with your awesome teaching.
Thank you David! Just in time, I was looking for a refresher on this topic! Thank you very much!
Always nice to get a refresher on this.
that was , what im scrolling around after a long searching.Thank you David
Nicely explained David. I did it myself before going through the answer and I only failed to identify the DP between S1 and S3. And the PC analogy is the best way to determine the ports.
Excellent question David. More please. :)
Great class, I will need to watch it again.
Thanks David! This was simplest explanation I ever got
Thank you so much my mentor, David !!
@David Bombal very helpful learning stp!
Thank you for sharing the "put a computer in the middle of the segment" I'm going to use that for my CCNP because I seem to struggle with determining designated and blocking ports.
Thank you for another great video.
Waiting for your course on the new CCNP.
Have a nice day David bombal
Very amazing video .
Thanks a lot for all of this explanations and precise details
Really Thanks 🌹🌹
6:42 It would have been helpful to have known in advance, that there is such a thing as port priority, because i thought of bridge priority when I saw the video the first time. Anyways: Very well done. Clear language, illustrations and teaching. Thank you very much!
Insanely helpful!!!
It got more from this one too, as i mcd Go/3 from s2, the last spanning tree video gave me the light thats why i got the other ones right n mcd one
Excellent presentation
Great lesson / thank you a lot !!!!!!! I catch up finally :)
hi David, great post! really appreciate it... I am also your Udemy student.. really hope you can post more these CCNA exam-like questions in the future. this type of videos are made up for what is missing in your Udemy class. thanks again
Fantastic explanation!
thank you for the very clear explanation
Thank you for this. The PC trick really helped
As soon as I saw this video before to start watching I liked it because I knew it would be interesting and helpful. Just know I finished watching it and I was right this video deserves LIKE. Especially I like the way to find DP =D Really it is the best way to find it. Thanks A lot, Mr. Bombal, wish You and your team all the best. You guys are awesome.
Thank you! I really appreciate the positive comments and support.
Hi David, thanks for the explanation :D
Excellent I see 444 liked and 0 Disliked - You won the GOLD STAR - David Bombal -
lol... thank you.... typically always get someone who dislikes my videos :(
Thank you Mr. David... I also looked at your courses on Udemy... :)
Great content 👍
Thank You Sir
Thanks my dude
root bridge criteria:
1- priority (the lower the better)
2. mac (the lower the better)
HI,
Very detail.
Let me ask a question, would spanning-tree still block/stop the loop if another pair of type of switch has spanning-tree disabled. The loop is on their end, say a cross-connect between the two switches ?
This video is amazing, you explain the spanning tree so details. but i still have question.
What if i want to send traffic from S3 to S5 is the spanning tree will be change automatically? Or the traffic data will going through the root bridge first?
Anyway thank you for the video!
Traffic in this example will have to traverse the root switch. That is why you want to use PVST and load share traffic across links.
Good
👍🏼
So if switch 3 wants to directly communicate with switch 5 does it need to go through the root switch to get there or can it go direct?
Hi David, thanks for this great example. Could you please tell me which IOS image are you running for the switch? I been trying with c3725 but I cant see the role. Thanks.
I'm using IOSvL2. There are a lot of issues and limitations using c3725 routers with Etherswitch modules. GNS3 recommends the use of IOSv for routers and IOSvL2 for switches.
Awesome videos quiz. How did you add those switch images in gns3 please help us am unable to add those switch images.
Thanks in advance.
Please watch this series of videos: ruclips.net/p/PLhfrWIlLOoKNFP_e5xcx5e2GDJIgk3ep6
If switches are transparent, how did I throw my back out racking one?
Not sure if I understand the half cost of 2 on the DP
How did you change the MAC address?
In GNS3. Right click on the switch and edit the settings. You can set the base MAC address in GNS3.
I am confused. At 9:00 minutes, you change the priority to 64. Cool! Except the change in priority is not reflected in the show spanning-tree table. I've rewatched this segment several times; the confusion is that you NEVER show the changed priority on S2. You muddied the waters here!
Being consistent is a good thing! When identifying DP, you tell us that this Bridge ID is lower than this other Bridge ID. But the label says Priority.
Thinking it over, there does seem to be issues with language. I'm guessing that it is regional. You say before switches, there were bridges. HUH??? I was taught that bridges connected different kinds of networks. The big one was the one that brought internet into your location. That network was not Ethernet; those distances were in miles and not feet. So you bridged to your Ethernet inside your location. Before switches, we used hubs. Hubs are simple devices that receive traffic on one port and broadcast it out all other ports. Every time! And the number of hops was important because each hop had a price as the inter packet spacing decreased and once that spacing was too small then communications ceased. Now, is that different from what you are calling a bridge?
I do not understand why you would switch between ID and Priority. An ID tends to be unique! And often is required to be!!! In this set up, 3 switches have the same priority. To say that is their ID is silly! If I say S4 then you know which switch because that is unique. But if I say 8192 then which switch do I mean? There are 3 with that priority so that would make a bad ID.
Thanks, I like the video. I just think you could be clearer. I confused someone yesterday because I kept referring to SFP transceivers as carriers and cartridges. Zero consistency on my part!
First
What do you use to draw on screen?