To anyone struggling with this subject or any other videos, watch them again and again unitl it clicks. I had to watch this vido a second time and now it clicks. Jeremy your videos are always detailed and it seems like you don't leave anything out. For example you always remind us how to enter the different modes, you never assume that we know it all and out of many other things that's what set you apart from other instructors on here. Thank you Jeremy!!!!
Spanning-tree is by far the hardest one to understand, I always give up here, but today finally everything is cleared after following the previous lecture for 5 times and practicing this lab for 3 times. Thank you!
@@simranc9773 First we have to agree that SW3 is the root bridge because it has the lowest priority. Next step is the question you asked, root port. In case of SW1, it is obvious that either F0/3 or F0/4 should be elected as root port because their cost to root bridge is 19 as compared to 27 if via F0/1 or F0/2. Then the question comes that which one, F0/3 or F0/4, since they share the same cost to root bridge we have to select the next tie-breaker, that is the neighbor switch's port ID, the lowest one wins. Because F0/4 of SW1 is connected to F0/1 of SW3 as compared to F0/3 of SW1 is connected to F0/2 of SW3, F0/4 wins. Hence F0/4 should be elected as root port of SW1.
ive spent 2 whole days watching the part one video. never struggled this much in my life but i kept on watching over and over and i wrote everything in the video from the beginning till the end until the 6th time, I finally got it, so we all are pushing!
I hope you're enjoying the course! If you want another great set of FREE packet tracer labs for the CCNA, check out Neil Anderson's lab guide here: www.flackbox.com/cisco-ccna-lab-guide#jm1
2:22 root bridge 3:30 root ports 5:24 remaining collision domain 6:35 CLI 6:45 *SW3#* show spanning tree 8:42 SW3# show spanning tree detail 8:56 SW3# show spanning tree summary 9:34 *SW1#* show spanning tree 10:06 *SW2#* show spanning tree 10:37 SW2# show spanning tree detail 10:58 *SW4#* show spanning tree
Thanks a lot Jeremy! I've watched countless STP videos just to get a grip of it but this is by far the most understandable of them all! I never understood STP until this video!!
I rewatched all Videos from Day 17 to this Lab 2 times each, I also bought NET SIM 3 month subs and of course I will get a year plan once it ends. It's really usefull tool. Once again, thanks Jeremy.
For those wondering why the link light is red on SW1's f0/4, it's because there's a small mistake in the way they are labelled. You should swap the f0/3 and f0/4 labels on SW1 and also the f0/1 and f0/2 labels on SW3. Great videos Jeremy!!
@@JeremysITLab I might have did a little dance haha. @Salmi Madmoud. The books are good. I found Jeremy's video along with Nail's guide helped me more than the books. I know there are other famous CBT Nugget/UA-camr that teach CCNA but they all seem too gimmicky. Jeremy's teaching is simple and straight to the point. I learn more from his and Neils videos then I did with any other. I say this because not only have I been studying on my own for over a year now I also attended CCNA Bootcamp at a well-known institute costing over 10K and left there more confused than anything haha.
Hi Jeremy! After this video, I've finally mustered up the courage to purchase both NetSim + Ex-Sim using your link. Also, I made sure to specify your channel too! The least I could do for this free CCNA course! So again, thank you so much for all the effort you put into this course for us! You gave me the courage to start studying for the CCNA!
Hi Jeremy.... in the minute 5:30 to 5:55 of this LAB video, i don´t understand the reason why Sw1 f0/3 and sw2 f0/3 are non designated ports if they are direct connect to the root bridge... Can you help me !! Thanks
woo! difficult subject! very happy to get the right answer... but theres a lot to go! picked up your manning book to assist in my studies. thanks so much for all you do!
Hi there, thank you for your extra work. I subscribed to Neil CCNA class option but I think your technique is more clear than his. I wish you had all the complete class even for small amount of fee... I m pretty sure lots people wouldn't paying for it. Thank you.
Hello! Thank you for your comment :) I wish I had the full course too, I could upload it on Udemy and sell it, then slowly upload it on UA-cam for free. Unfortunately I don't have a lot of time to make videos because I am working as a network engineer, so I can't release videos much faster than this.
Hey Jeremy I have my CCNA scheduled for the end of this month. I wanted to know what topics are still left for me to study after I’ve exhausted all that you’ve covered in this series. Thank you very much for your hard work when I pass I will definitely be leaving you a generous tip!
Good luck on the exam! My course is only about 50% complete at the moment, check the official exam topics list to see what other topics you need to know: www.cisco.com/c/dam/en_us/training-events/le31/le46/cln/marketing/exam-topics/200-301-CCNA.pdf
Link lights would've led me astray. I thankfully didn't cheat with them, but I turned them back on after solving the lab and checked the lights to see if they also confirmed what I saw in the CLI. SW1's F0/3 link light was green and F0/4 link light was orange. However, this wasn't reflective of the answers I found or what the CLI suggested. I had SW1's F0/3 as non-designated (blocking state) and F0/4 as the root port (forwarding state) which the CLI had shown as well upon issuing the "show spanning-tree" command. I dug a little further and found that the ports were mislabeled in the lab. I presume this was intentional to show why you shouldn't use link lights and labeling for the basis of your answer without doing further research in the CLI. Thank you for the lectures thus far. I've received many lectures on STP in the past and this one has improved my comprehension of the protocol better than all of the past lectures combined.
I was struggling to get it from the previous video with the root cost. I even tried going to a tutor then I watched this video of the lab and it starts to make much more better sense. Is there a resource you can recommend like subnetpractice where I can practice stp on a worksheet ? That would be a great valuable resource. Thanks
Hello Jeremy All your videos are very good explanations!!! I appreciate your work n efforts for your viewers!! Thank you Do you have any lessons for CCNP ENCOR 350-401?
Hi Jeremy, Kindly assist me on this, I thought that the cost for example from SW2's G0/1 to SW3's G0/1 is 12 (G0/1 on SW2+G0/1 on SW4 +G0/2 on SW4 + G0/1 on SW3) But I notice you didn't consider SW4's G0/1 or even SW1's F0/1, F0/2 when calculating root cost from SW1 to SW3 via SW2.In the topology just after path costs (the one that has 3 switches and 3 connected PCs, you were calculating the costs on both ends of the link but here, you're only calculating the cost of one side of the link. 3:45 , why is the cost for f0/1 or f0/2 on SW1 (19), SW4's G0/1(4), SW3's G0/1 (0) not considered to make it 50? Thanks a lot!
Hey Jeremy, your videos are amazing and understandable. Thank you so much for this. Just want to know that I tried to download packet tracer lab files but I couldn't download them. so I tried that link you provided in the description.
hey Jeremy, not sure if this is a bug with packet tracer or the file, but with port lights turned on it shows sw1 f0/4 as orange although it is root port in the sw1 cli, if you disconnect and reconnect f0/3-4 on sw1 it fixes the light issue. Also ran into the issue of disconnecting one port (sw1 f0/3) and when trying to reconnect it gives me the option of f0/4 and not f0/3, caused packet tracker to crash once.
I think the problem is just that my labels are placed incorrectly on the diagram. When I connect two switches with two links I can't tell which is which. I guess I could use the port lights to confirm, but I didn't do that, I always have port lights off in packet tracer.
There’s a small but important labeling error in this lab setup: On SW3, the labels for F0/1 and F0/2 should be swapped. Currently, F0/1 is on the right and F0/2 is on the left, but they need to be reversed. Similarly, on SW1, the labels for F0/3 and F0/4 are incorrect. The link light on SW1 turns green on the left side, which should correspond to F0/4, but it’s incorrectly labeled as F0/3. This mislabeling created a lot of confusion, as it didn't align with the CLI output. It took me almost a full day to identify this discrepancy by carefully comparing the CLI details with the physical layout.
Every collision domain MUST have one designated port. The other port in the collision domain, connected to the designated port, must be either a ROOT port or DESIGNATED port. Since SW2s G0/1 interface is already a root port, F0/3 has to be a non-designated port.
So, when determining the root port of a switch you take the interface with the shortest root cost, but when determining the designated port of the final collision domain(s) you choose the port on "the switch that has the shortest POSSIBLE root cost"?
Hi Jeremy, Your course is really the best CCNA online course. Do you know if it's possible to get the PDF copies of your slides ? it will help to memorize important notions by re-reading the section in the PDF document. Thank you for the good work.
Sorry, I tried to convert them to PDF but my slides don't work well in PDF because of how I design them. Instead of making many slides, I make fewer slides and stack lots of things on top of each other, making things appear/disappear as I need during the presentation. When I convert them to PDF, it's a mess.
When we talk about MAC addresses of a Switch, as I understand - each port on a Switch has its own MAC address, but ,as you said in previous videos, they are used for other purposes. Does it mean that a Switch also has a MAC address that is for the Switch itself as a whole device?
@@JeremysITLab Thank you Jeremy so much for your prompt replies for all of the comments. This question was always confused me, and now I have an answer
Does the new ccna have a configuration questions where we have to type the commands or it is just in form of a muliple choice questions where we get to select the correct command?
Hello Jeremy, first all thank for the tutorials . I want to get boson NetSim but i would like to know if it has expiration date or it is lifetime software, thanks
You can read Boson's license agreement here: www.boson.com/sula#NetSim It says the term is three years, but I'm pretty sure you can keep using it after that, I believe that is just so they aren't obligated to continue supporting old versions of the software (for old exams)
Hello mister Jeremy in switch 1 you chose f0/4 to be the root though f0/3 is less than it. How is that? In the previous video you said we should choose the Neighbors lowest port
Jeremy, I think there is an error in this. SW1 and SW4 labels have priorities of 32679 - which is 28672 + vlan 4007. I think its supposed to be 32769, 32768 + vlan 1.
As you said before every switches connected to root bridge switch has designated ports and root ports but I am really confused in switch 1 as there is no any designated ports
Hey Jeremy, if we assign the name of interfaces in SW3, meaning instead of F0/1 we put F0/2 and vice versa, the root port on SW1 will be on F0/3 not F0/4?
When using the `show spanning-tree detail` to display root cost, it looks like only the root cost for the root port (and no other ports on the switch) is displayed. Is this generally true? just a relic of Packet Tracer (or the particular device or IOS version used in the example)? something else?
Hi Jeremy hope you're doing great. I have some clarification on the Root Path Cost on SW2, my answer was 38 because the total RPC from Root Bridge is ZERO then adding the port cost from SW1 it will be 19 right? How about when SW1 sends BPDU Hello to SW2 the Root Patch Cost is 19 already from SW1 then as SW2 receives the BPDU Hello I thought it should add its own port cost to the Root Patch Cost or Total Root Cost so RPC = 19 then SW2 Port Cost = 19 should it be 38? I've answered correctly other ports except the last 2 COLLISION DOMAINS from SW1 and SW2. I hope I am clear with my question. Hope you can help. Thank you for the vid.
Follow the link in the description: 'Get all flashcards/labs for the course: jeremysitlab.com/youtube-join/ ' I'll send you the Google Drive with all flashcards/labs.
Hi Jeremy, When STP converges initially, all ports will be in blocked state and if the interface in this state doesn't forward any STP BPDUs how does this root bridge election takes place .
Hello sir, I'm from India. I started watching your ccna videos and I'm feeling great. I would like to know how many videos will be published for this course?? You just need to say an approximate figure. It'll help me to make a time table for this.
In what scenario would the links between SW1 & SW2 would get activated? They both have the same root cost so i was wondering which one of them would get activated & how will it be decided.
Well, they're functioning as backups. For example, if SW1 loses its F0/3 and F0/4 connections to SW3 (either because of a hardware failure or a purposeful change in network design), SW1 will need a new path to the root bridge. It will select the root port with the same STP rules as always, so F0/1 would be the new root port in this case.
Question: when i know everything what is needed for CCNA and would pass the exam easy with 960+, how much knowledge i would have at this point for CCNP ??
Hi Jeremy, I really like your course! But I am wondering if the meterial here applies to the Cisco SG350 series. I noticed some of the commands do not work.
Netsim 11 when I access a switch immediately enters config mode and does not allow me to launch the show spanning-tree command of the first exercise. Always returns the "incomplete command" error. Has it happened to someone and how did it solve it?
@jeremy how do I find the mac address of a switch in packet tracer? I wanted to practice finding the root bridge myself in packet tracer, but couldn't find MAC address of the switch
A root bridge does not have any root ports. All ports on a root bridge are designated ports. A switch that is not the root bridge of a network topology has only one root port defined.
thank you so much ... i still have hard time understanding the port cost of SW2 g0/1 to SW3 g0/1 ... i understand that SW3 port cost is 0 because it the root bridge, but what i don't understand from SW2 to SW4 shouldn't the port cost by 8 but you said that from SW2 g0/1 to SW4 g0/1 port cost is 4 ,then from SW4 g0/2 to SW3 g0/1 is 8 .... other than this i have no problem ..... and again thank you so much :D
You don't have to do any configurations, STP is enabled by default and the root bridge will be automatically selected. There are some cases where you should select a specific root bridge, I will talk about that later in the course!
I changed the system, I will send you a link with all of the flashcards/lab files for the course. Check the description: 'Get all flashcards/labs for the course: jeremysitlab.com/youtube-join/'
Hi jeremy ,Thank you for this great playlist,I have a problem how can i get this practise Labs on Packet tracer. i could not find any link in description??
How is the cost of Designated ports of the Route bridge being 4 or 19 or etc in the result of the command sh spanning-tree on SW3 "which is the root bridge" ?! shouldn't the cost be zero on the Route?
I've changed the system to just providing the link to the Google drive folder containing all of the downloads (I will update it as I upload more videos). Sign up for my mail list to get the link (feel free to unsubscribe right away if you're not interested): jeremysitlab.com/youtube-join/
I watched this Video four times I was lots how did he get the cost of 19 but eventually I found it, for those who are struggling watch the lecture video a couple of times to get all the contents of the spanning Tree,
To anyone struggling with this subject or any other videos, watch them again and again unitl it clicks. I had to watch this vido a second time
and now it clicks. Jeremy your videos are always detailed and it seems like you don't leave anything out. For example you always remind us how to enter the different modes, you never assume that we know it all and out of many other things that's what set you apart from other instructors on here. Thank you Jeremy!!!!
ERRATA: AT 3:42 I said "SW1's G0/1". It should be "SW2's G0/1".
when i turned on the lights, i saw that the ports on SW1 are badly taged - F0/4 should be F0/3 and vice versa :)
@@bartsimpson2324 it's okay we all make mistakes
Spanning-tree is by far the hardest one to understand, I always give up here, but today finally everything is cleared after following the previous lecture for 5 times and practicing this lab for 3 times. Thank you!
Nice ! can you please help me understand how to find the root port , I dint get it , at 3:31
@@simranc9773 First we have to agree that SW3 is the root bridge because it has the lowest priority.
Next step is the question you asked, root port. In case of SW1, it is obvious that either F0/3 or F0/4 should be elected as root port because their cost to root bridge is 19 as compared to 27 if via F0/1 or F0/2.
Then the question comes that which one, F0/3 or F0/4, since they share the same cost to root bridge we have to select the next tie-breaker, that is the neighbor switch's port ID, the lowest one wins. Because F0/4 of SW1 is connected to F0/1 of SW3 as compared to F0/3 of SW1 is connected to F0/2 of SW3, F0/4 wins. Hence F0/4 should be elected as root port of SW1.
@@rotrose7531 Thank you for the numbers 19 and 27 representing the costs, how do you get the numbers(cost)?
😲 I only don't understand, where does the Priority come from. 😞
ive spent 2 whole days watching the part one video. never struggled this much in my life but i kept on watching over and over and i wrote everything in the video from the beginning till the end until the 6th time, I finally got it, so we all are pushing!
I hope you're enjoying the course! If you want another great set of FREE packet tracer labs for the CCNA, check out Neil Anderson's lab guide here: www.flackbox.com/cisco-ccna-lab-guide#jm1
Thanks a lot jeremy for sharing this wonderful resource
The link is not working anymore, is there an updated one ?
@@gerryvalenzuela9158 where had you opened it? because this link is working only on mobile
Hi will your videos help me pass ccna on there own or do I need the books too
on Neil Anderson web show non secure.
2:22 root bridge
3:30 root ports
5:24 remaining collision domain
6:35 CLI
6:45 *SW3#* show spanning tree
8:42 SW3# show spanning tree detail
8:56 SW3# show spanning tree summary
9:34 *SW1#* show spanning tree
10:06 *SW2#* show spanning tree
10:37 SW2# show spanning tree detail
10:58 *SW4#* show spanning tree
specifically came back to this video cause I couldn't remember one of the spanning tree commands, thanks!
Thanks a lot Jeremy! I've watched countless STP videos just to get a grip of it but this is by far the most understandable of them all! I never understood STP until this video!!
Glad it was helpful! Thanks John
I rewatched all Videos from Day 17 to this Lab 2 times each, I also bought NET SIM 3 month subs and of course I will get a year plan once it ends. It's really usefull tool. Once again, thanks Jeremy.
Overrated tool imo, not necessary for the CCNA. Might just get it to support Jeremy though, as I think he gets a cut, which he deserves.
For those wondering why the link light is red on SW1's f0/4, it's because there's a small mistake in the way they are labelled. You should swap the f0/3 and f0/4 labels on SW1 and also the f0/1 and f0/2 labels on SW3. Great videos Jeremy!!
This was driving me crazy! Thanks
Jeremy you are helping me underestand advanced topics of CCNA in very easy way. Can't be more thankful to you man.
Thanks for your comment, I'm glad to help :)
Hey Jeremy, I passed CCNA Friday. So thank you. Neil Guide was great as well!
Congratulation!!
Congratulations!
Do you suggest that I read the book or the videos with labs are enough?
Thank you
Congrats Devin, that's amazing! That's a great achievement, I hope you celebrated ;)
@@JeremysITLab I might have did a little dance haha.
@Salmi Madmoud. The books are good. I found Jeremy's video along with Nail's guide helped me more than the books.
I know there are other famous CBT Nugget/UA-camr that teach CCNA but they all seem too gimmicky.
Jeremy's teaching is simple and straight to the point. I learn more from his and Neils videos then I did with any other. I say this because not only have I been studying on my own for over a year now I also attended CCNA Bootcamp at a well-known institute costing over 10K and left there more confused than anything haha.
how long did you study to pass ?
Hi Jeremy! After this video, I've finally mustered up the courage to purchase both NetSim + Ex-Sim using your link. Also, I made sure to specify your channel too! The least I could do for this free CCNA course! So again, thank you so much for all the effort you put into this course for us! You gave me the courage to start studying for the CCNA!
Thank you Shlomi! I'm sure they will be very helpful for you :)
Jeremy awesome STP videos.
You are always unique among youtubers. ❤️
The root cost was hard to understand in the lecture video but in this lab, it so much more understandable! Thank you!
Agreed! It just clicked for me.
Jeremy, Thank you for all the great material you provide. It is helping solidify the concepts.
Thanks, William :)
Best teacher for CCNA Course Love from India
Thanks again Jeremy for your videos. Your way of explaining is so easy to understand .
Thank you :)
Hi Jeremy.... in the minute 5:30 to 5:55 of this LAB video, i don´t understand the reason why Sw1 f0/3 and sw2 f0/3 are non designated ports if they are direct connect to the root bridge... Can you help me !! Thanks
There can be multiple direct connections between a switch and its root bridge. But only one port on the switch can be a "root" port.
The joy and happiness when you do a lab without watching the video first and do it exactly as Jeremy explain in the actual lab video is matchless
thanks again jeremy. for everything. the best CCNA online course
Thank you :)
Thank you for your dedication. You are a wonderful, good person.
Aloha J
I purchased my online to be delivered Mon. 8th at 10 am HST.
6 more days of hard core review, boson prep exams & labs. 🤙😎
Best of luck Kele, let me know how it goes!
@@JeremysITLab rasta
Great job Jeremy, keep up the good work.
Hi Jeremy! I would like to thank you again for all this free info you are sharing!
The best video on STP on UA-cam!
Thank you! Glad to hear that :)
woo! difficult subject! very happy to get the right answer... but theres a lot to go! picked up your manning book to assist in my studies. thanks so much for all you do!
Hi there,
thank you for your extra work. I subscribed to Neil CCNA class option but I think your technique is more clear than his.
I wish you had all the complete class even for small amount of fee... I m pretty sure lots people wouldn't paying for it.
Thank you.
Hello! Thank you for your comment :)
I wish I had the full course too, I could upload it on Udemy and sell it, then slowly upload it on UA-cam for free. Unfortunately I don't have a lot of time to make videos because I am working as a network engineer, so I can't release videos much faster than this.
again jeremy, thank you for your amazing videos! i had to watch them 3 times till i got it. much appreciations!
Hey Jeremy I have my CCNA scheduled for the end of this month. I wanted to know what topics are still left for me to study after I’ve exhausted all that you’ve covered in this series. Thank you very much for your hard work when I pass I will definitely be leaving you a generous tip!
Good luck on the exam! My course is only about 50% complete at the moment, check the official exam topics list to see what other topics you need to know: www.cisco.com/c/dam/en_us/training-events/le31/le46/cln/marketing/exam-topics/200-301-CCNA.pdf
@@JeremysITLab Can I ask when do you estimate you will have your course 100% completed? Also thank you very much for the high quality content.
Thank you so much Jeremy! Watching all your videos. You are a blessing!
Great teacher. I observed an error at 9:43 where SW1 bridge ID from the CLI is different from the bridge ID from the question. Thanks for the content.
Link lights would've led me astray. I thankfully didn't cheat with them, but I turned them back on after solving the lab and checked the lights to see if they also confirmed what I saw in the CLI. SW1's F0/3 link light was green and F0/4 link light was orange. However, this wasn't reflective of the answers I found or what the CLI suggested.
I had SW1's F0/3 as non-designated (blocking state) and F0/4 as the root port (forwarding state) which the CLI had shown as well upon issuing the "show spanning-tree" command. I dug a little further and found that the ports were mislabeled in the lab. I presume this was intentional to show why you shouldn't use link lights and labeling for the basis of your answer without doing further research in the CLI.
Thank you for the lectures thus far. I've received many lectures on STP in the past and this one has improved my comprehension of the protocol better than all of the past lectures combined.
Sir, you deserve more but I can't do more than a comment, like, share and subscribe!
I mean it...
'ctrl+shift+6' to abort domain server name look up.....that stuff gets annoying after a while.
It is not working bro
@@gowthamdev4658it. Does
I can not but thank you for all your effort to make us understand deeply.
I was struggling to get it from the previous video with the root cost. I even tried going to a tutor then I watched this video of the lab and it starts to make much more better sense. Is there a resource you can recommend like subnetpractice where I can practice stp on a worksheet ? That would be a great valuable resource. Thanks
Hello Jeremy
All your videos are very good explanations!!! I appreciate your work n efforts for your viewers!! Thank you
Do you have any lessons for CCNP ENCOR 350-401?
Thank you! No, I don't have any CCNP lessons, just trying to finish my CCNA course first.
I really really appreciate your course. Thanks a lot.
This is an excellent video and a great lab.
Thanks Wilbur :)
The best series ever
Thank you :)
absolutely brilliant exercises.
Thanks Jeremy you doing a wonderful job
Thank you!
Hi Jeremy,
Kindly assist me on this, I thought that the cost for example from SW2's G0/1 to SW3's G0/1 is 12 (G0/1 on SW2+G0/1 on SW4 +G0/2 on SW4 + G0/1 on SW3) But I notice you didn't consider SW4's G0/1 or even SW1's F0/1, F0/2 when calculating root cost from SW1 to SW3 via SW2.In the topology just after path costs (the one that has 3 switches and 3 connected PCs, you were calculating the costs on both ends of the link but here, you're only calculating the cost of one side of the link.
3:45 , why is the cost for f0/1 or f0/2 on SW1 (19), SW4's G0/1(4), SW3's G0/1 (0) not considered to make it 50?
Thanks a lot!
Thank you very much for this top quality video!
Thanks for watching :)
Thanks Jeremy keep up the great work ;)
Thanks as always, Alberto!
Hey Jeremy, your videos are amazing and understandable. Thank you so much for this. Just want to know that I tried to download packet tracer lab files but I couldn't download them. so I tried that link you provided in the description.
Thank you Jeremy for your help, I'll keep on trying.
hey Jeremy, not sure if this is a bug with packet tracer or the file, but with port lights turned on it shows sw1 f0/4 as orange although it is root port in the sw1 cli, if you disconnect and reconnect f0/3-4 on sw1 it fixes the light issue. Also ran into the issue of disconnecting one port (sw1 f0/3) and when trying to reconnect it gives me the option of f0/4 and not f0/3, caused packet tracker to crash once.
I think the problem is just that my labels are placed incorrectly on the diagram. When I connect two switches with two links I can't tell which is which.
I guess I could use the port lights to confirm, but I didn't do that, I always have port lights off in packet tracer.
There’s a small but important labeling error in this lab setup:
On SW3, the labels for F0/1 and F0/2 should be swapped. Currently, F0/1 is on the right and F0/2 is on the left, but they need to be reversed.
Similarly, on SW1, the labels for F0/3 and F0/4 are incorrect. The link light on SW1 turns green on the left side, which should correspond to F0/4, but it’s incorrectly labeled as F0/3.
This mislabeling created a lot of confusion, as it didn't align with the CLI output. It took me almost a full day to identify this discrepancy by carefully comparing the CLI details with the physical layout.
love your vids by the way ty for the great content😍
5:46 Why it’s non-designated? Jeremy says it’s because they connected to the root bridge, I didn’t understand why.
Every collision domain MUST have one designated port. The other port in the collision domain, connected to the designated port, must be either a ROOT port or DESIGNATED port. Since SW2s G0/1 interface is already a root port, F0/3 has to be a non-designated port.
So, when determining the root port of a switch you take the interface with the shortest root cost, but when determining the designated port of the final collision domain(s) you choose the port on "the switch that has the shortest POSSIBLE root cost"?
Hi Jeremy,
Your course is really the best CCNA online course.
Do you know if it's possible to get the PDF copies of your slides ? it will help to memorize important notions by re-reading the section in the PDF document.
Thank you for the good work.
Me personally write everything down. You remember everything easier when you write down.
Sorry, I tried to convert them to PDF but my slides don't work well in PDF because of how I design them. Instead of making many slides, I make fewer slides and stack lots of things on top of each other, making things appear/disappear as I need during the presentation. When I convert them to PDF, it's a mess.
Thanks Jeremy. Been waiting
Thank you :)
Who is on day 20 today ….lets keep going
Jeremy - can you explain how you calculate the cost of the interfaces?
Chen H Hey did you watch Day 20’s video? It’s explained in there: ua-cam.com/video/j-bK-EFt9cY/v-deo.html
It took a 2nd look but I think STP has clicked or at least have a much better understanding.
very good, actually the root cost will consider how many hops to reach root bridge switch, as well as the speed of ports
It doesn't consider the number of hops, it considers the total cost.
When we talk about MAC addresses of a Switch, as I understand - each port on a Switch has its own MAC address, but ,as you said in previous videos, they are used for other purposes.
Does it mean that a Switch also has a MAC address that is for the Switch itself as a whole device?
Yes that's correct, there is a MAC address for the switch as a whole.
@@JeremysITLab Thank you Jeremy so much for your prompt replies for all of the comments. This question was always confused me, and now I have an answer
Does the new ccna have a configuration questions where we have to type the commands or it is just in form of a muliple choice questions where we get to select the correct command?
Just multiple choice
Hello Jeremy, first all thank for the tutorials . I want to get boson NetSim but i would like to know if it has expiration date or it is lifetime software, thanks
You can read Boson's license agreement here: www.boson.com/sula#NetSim
It says the term is three years, but I'm pretty sure you can keep using it after that, I believe that is just so they aren't obligated to continue supporting old versions of the software (for old exams)
@@JeremysITLab accurate^ we never revoke access, and support updates for 3 years
Thank you very much , you are so helpful
Boson Software I don’t have windows machine only apple :(
3:42 SW2's G0/1*
Indeed! Thanks for pointing that out.
Jeremy's IT Lab No problem, keep up the good work🤍
Hello mister Jeremy in switch 1 you chose f0/4 to be the root though f0/3 is less than it. How is that? In the previous video you said we should choose the Neighbors lowest port
NEIGHBOR's lowest port. F0/3 and F0/4 are both on SW1, they are not 'neighbors' ports.
Thank u! Such a genius
God bless you Jeremy.
Jeremy, I think there is an error in this. SW1 and SW4 labels have priorities of 32679 - which is 28672 + vlan 4007. I think its supposed to be 32769, 32768 + vlan 1.
As you said before every switches connected to root bridge switch has designated ports and root ports but I am really confused in switch 1 as there is no any designated ports
I said all ports on the root bridge are designated ports, I didn't say all switches connected to the root bridge have designated ports.
Hey Jeremy, if we assign the name of interfaces in SW3, meaning instead of F0/1 we put F0/2 and vice versa, the root port on SW1 will be on F0/3 not F0/4?
When using the `show spanning-tree detail` to display root cost, it looks like only the root cost for the root port (and no other ports on the switch) is displayed. Is this generally true? just a relic of Packet Tracer (or the particular device or IOS version used in the example)? something else?
Hi Jeremy hope you're doing great. I have some clarification on the Root Path Cost on SW2, my answer was 38 because the total RPC from Root Bridge is ZERO then adding the port cost from SW1 it will be 19 right? How about when SW1 sends BPDU Hello to SW2 the Root Patch Cost is 19 already from SW1 then as SW2 receives the BPDU Hello I thought it should add its own port cost to the Root Patch Cost or Total Root Cost so RPC = 19 then SW2 Port Cost = 19 should it be 38? I've answered correctly other ports except the last 2 COLLISION DOMAINS from SW1 and SW2. I hope I am clear with my question. Hope you can help. Thank you for the vid.
SW2's root cost is 8. SW2 to SW4 = cost of 4, SW4 to SW3 = cost of 4, therefore total cost of 8.
Hi Jeremy...
when do you think the course will be completely uploaded?
I think it will be around the end of this year, or early next year
hey Jeremy, have the download links for the packet tracer files gone? can't seem to find them
Follow the link in the description:
'Get all flashcards/labs for the course: jeremysitlab.com/youtube-join/ '
I'll send you the Google Drive with all flashcards/labs.
Now you have to pay $30.00
. ? @Jeremy ?
@@CRISTIANBIDY Nope
Hello sir upto day 20 we covered, waiting for next classes
Thanks for watching! Next one is coming this weekend.
Ok sir thank you
This is a very nice video. DO you know, where the Bridge Priority number is coming from?
Hi Jeremy, When STP converges initially, all ports will be in blocked state and if the interface in this state doesn't forward any STP BPDUs how does this root bridge election takes place .
Actually when they are in blocked state they only forward STP BPDUs Every other type of frame is blocked.
Hello sir,
I'm from India. I started watching your ccna videos and I'm feeling great. I would like to know how many videos will be published for this course??
You just need to say an approximate figure. It'll help me to make a time table for this.
My course is about 50% finished I think. I guess there will be about 50 'days' in total, so maybe 100 videos.
Hi mr.Jeremy thank u for the great course and I want to ask what the estimated time for the course to be completed
I think I will complete it around the end of this year.
In what scenario would the links between SW1 & SW2 would get activated? They both have the same root cost so i was wondering which one of them would get activated & how will it be decided.
Well, they're functioning as backups. For example, if SW1 loses its F0/3 and F0/4 connections to SW3 (either because of a hardware failure or a purposeful change in network design), SW1 will need a new path to the root bridge. It will select the root port with the same STP rules as always, so F0/1 would be the new root port in this case.
@@JeremysITLab Thank you Jeremy!
Thanks 🥳🥳🥳🥳💯 for everything
God bless
Thank you :)
Question: when i know everything what is needed for CCNA and would pass the exam easy with 960+, how much knowledge i would have at this point for CCNP ??
thank you , i thank you how the trust that you learn fo this course serieas
Thank you :)
have u seen the day 21 video please
Hi Jeremy, I really like your course! But I am wondering if the meterial here applies to the Cisco SG350 series. I noticed some of the commands do not work.
The small business switches run a different operating system (not IOS), so commands are different (I'm not familiar with their commands).
Netsim 11 when I access a switch immediately enters config mode and does not allow me to launch the show spanning-tree command of the first exercise. Always returns the "incomplete command" error. Has it happened to someone and how did it solve it?
I recommend contacting Boson if you think there are some bugs!
@jeremy how do I find the mac address of a switch in packet tracer? I wanted to practice finding the root bridge myself in packet tracer, but couldn't find MAC address of the switch
Use 'show version' and look for the 'Base ethernet MAC Address'
@@JeremysITLab Awesome! Got it, thank you for your quick reply!
Head is swimming on STP terms and tech. Watched this vid and lectures a couple times. One of these times its going to click.
A root bridge does not have any root ports. All ports on a root bridge are designated ports. A switch that is not the root bridge of a network topology has only one root port defined.
Loving it!
"show spanning-tree detail" does not show total cost of other path?
thank you so much ... i still have hard time understanding the port cost of SW2 g0/1 to SW3 g0/1 ... i understand that SW3 port cost is 0 because it the root bridge, but what i don't understand from SW2 to SW4 shouldn't the port cost by 8 but you said that from SW2 g0/1 to SW4 g0/1 port cost is 4 ,then from SW4 g0/2 to SW3 g0/1 is 8 .... other than this i have no problem ..... and again thank you so much :D
The root cost is 4 (for SW2’s G0/1) + 4 (for SW4’s G0/2) = 8
Does he configured commands in the background or what? because I got result completely different of his
Hey jermey ..do we need to configure the switch as root beidge or its configured auromatically id stp is enabled
You don't have to do any configurations, STP is enabled by default and the root bridge will be automatically selected. There are some cases where you should select a specific root bridge, I will talk about that later in the course!
sir where is the packet tracer file for this lab .it not in the description of this video . thanks for your help
I changed the system, I will send you a link with all of the flashcards/lab files for the course.
Check the description:
'Get all flashcards/labs for the course: jeremysitlab.com/youtube-join/'
Thank you Jeremy .
Thank you!
Hi jeremy ,Thank you for this great playlist,I have a problem how can i get this practise Labs on Packet tracer. i could not find any link in description??
Top line of the description!
How is the cost of Designated ports of the Route bridge being 4 or 19 or etc in the result of the command sh spanning-tree on SW3 "which is the root bridge" ?! shouldn't the cost be zero on the Route?
That value indicates the spanning tree cost of the interface, not the interface's cost to the root bridge in this particular network,
Where are the anki cards and lab files?
I've changed the system to just providing the link to the Google drive folder containing all of the downloads (I will update it as I upload more videos). Sign up for my mail list to get the link (feel free to unsubscribe right away if you're not interested): jeremysitlab.com/youtube-join/
You are great. ❤️
Thank you :)
But there is no connectio between SW2 and SW1 after both f0/1 and f0/2 on SW1 are labeled undesignated, I thought one of them should be left open(?)
Nope, that would result in a loop in the network
Thanks Jeremy ! you help a lot)
I watched this Video four times I was lots how did he get the cost of 19 but eventually I found it, for those who are struggling watch the lecture video a couple of times to get all the contents of the spanning Tree,
Very good lesson
Thanks, Jeremy
Thanks for watching, Emil :)