Spanning Tree Protocol (STP) Deep Dive

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This video is a replay of a live webcast covering all Spanning Tree Protocol (STP) topics on Cisco's CCNA (200-301) and CCNP Enterprise ENCOR (350-401) Exam Blueprints.
Enjoy the training!
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Kevin Wallace, CCIEx2 #7945 Emeritus (Collaboration and R&S)
Homepage: kwtrain.com
Twitter: / kwallaceccie
Facebook: / kwallaceccie
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LinkedIn: / kwallaceccie
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If you enjoyed this video, here is the video title and also the link for you to share:
Spanning Tree Protocol (STP) Deep Dive
• Spanning Tree Protocol...
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[@peterwagdy9756]

I am just 20 mins into this lecture, i have been awake over night till now for about 36 hours or more, and i am really enjoying learning and listening very much I am not sleepy anymore...feels like i found someone to follow on my networks learning journey, i am so happy really

[@kwallaceccie]

Thanks so much!

[@vMambaaa]

You’re a legend for putting out content like this. Love seeing networking topics discussed at a really low level on YT.

[@david90210ca]

Very thankful for your clear explanations and your willingness to teach. You cleared a lot of things up for me and helped to inspired me to teach others.

[@hcetc]

You have explained the concepts that appeared complex, so well and made them easily understandable. Once again, thank you Kevin.

[@Carcadia_]

Love the anecdotes, make the points so much more meaningful!

[@gmoose6112]

Very nice. I love your resume and your history lessons. I worked at DEC on PDP 11 and VAX 750/7800 systems in 80's and did not know that STP originated from one of my co-workers 😆.

[@cmhtw94]

Thank you Kevin -- another great session -- I'm currently running through all your 'deep-dive' tutorials for my CCNA 200-301, very easy to follow and can't recommend enough to other students. Packet Tracer is capable of covering most of the content should anyone require hands-on. Thanks again 🙏

[@YouTubist666]

37:40 Nice job. Thanks. You helped me understand how designated ports and blocked cords are determined. I like how you used a more complex example than most others.

[@Konamerp]

I appreciate this video. I struggled to retain a lot of the fundamental concepts of the STP, including the differences and similarities between the different versions. For some reason between the text book and a couple video courses I watch, I couldn't get it down solidly. I like that you really spent the time to explain everything concisely and clearly with examples. I feel confident that I understand it now and I feel ready to move onto the next part of my CCNA learning!

[@joselevicanasenjo2171]

I am new in Cyber technology and I came across a problem related to STP. This is the best presentation I found, you explanation are very clear, your examples are different (tricky) ... and I am just half throu the presentation. I cant wait to see the lab!!!thanks for posting. Great work

[@cyberciscowebdev8371]

Kevin is the Man when it comes to networking and information technology. Video content and Explanation is superb 👍

[@benjaminboateng3276]

Thanks KWTraining for this awesome clarification on STP. As it is inevitable in our networks today, understanding how to work with it is essential and you really make it clear here...

[@jacobennis1117]

This dive has been wonderful. Thank you for your contribution.

[@digiground7613]

Thank you, Sir. I really enjoyed listening to how you can explain concepts in such a good way.

[@sergnic6998]

The best explanation of additional features of STP like PortFast, BackboneFast etc. 👍

[@lostman555]

Sir Kevin Wallace you are explaining everything in a crystal clear manner. I am getting guidance in almost everything related to networking by watching your videos. You are computer network genius. Thank you so much ❤

[@thorwaldvandertooren2566]

Very nice explanation Kevin, really sympathetic approach to online teaching. Nice personal stories, great transfer of technically correct information. Kudos to U

[@JIKID]

Thank you for explaining MST in laymans terms for me. SUPER simple to understand. My OCG guide and googling this question to understand MST really is was really frustrating it. You explained it PERFECTLY!!! THANK YOU MAN!!!!

[@drmanhattan225]

Kevin you are a real asset to the networking community. After I pass Encor I'll definitely be buying your ENARSI video course.

[@saibot293]

These deep dives are gold!!

[@johnuppole]

These deep dive videos are amazing content. Thank you for sharing!!

[@davesradiorepairs6344]

This was an amazingly detailed explanation for STP... Thank you...

[@rockinron5113]

Great webinar. Thanks Kev. 🇬🇧🇺🇸

[@DaffdaTheOriginal]

So many very real-life valuable details derived from many lessons-learned I guess, thank you.

[@wally19]

This is fantastic, i was finishing STP theory and then i saw this live... thx!

[@Rajat-qo7ot]

KZbin algo is awesome indeed

[@herb2181]

Excellent- Explanation of the over all process of Spanning Tree

[@mohanasundaramsivakumar8253]

Thanks for this awesome video !! One of the best instructor

[@thelegalsystem]

3:48 I worked as NOC for a small fiber ISP a few years ago and learned very quickly how the Backhoe is the natural predator of the fiber run.

[@pabloverano5602]

Thanks for the class professor.

[@hendennio9340]

i appreciate a lot this video . i was really struggling to learn spanning tree. the way how you explain its very clear and easy . Thanks a lot

[@umairm8595]

Thank you Kevin this is very helpful

[@moussatouhami7567]

Thanks for the passion, and thess precious info 💙

[@JohnCutter317]

just like subnetting I have to come back to this for a refresher since now days the equipment rarely has spanning tree issues in the field. Used this video before CCNA a year ago. Using now for ENCOR

[@kamakshimamidipudi9699]

Really really a great lecture, thanks a lot!!

[@manigandansrinivasan5194]

Great video kevin

[@samucancld]

this is amazing, thanks Kevin

[@cristianguzman2651]

Simply...great, great great!!!!!

[@Willian2009Stive]

I loved the report regarding Broadcast Storm… kkkkk.. great experience and cleverness

[@adbtqi]

Superb , clear and helpful

[@larryking8533]

Informative......thanks Kevin

[@mohamedkamal3514]

Amazing instructor. 🌹

[@Don-Carillo]

Very good. Very intresting. Love it

[@mohitbhongade1387]

The session was amazing. I am requesting please schedule another deep dive on EVPN. Please...

[@datedatekyal3650]

Thanks for sharing great contents

[@Yaman328]

Time to recert, I'm still coming back to you. My first Cisco cert was in 2018!!!

[@wolffang209]

Thanks this was an amazing video!

[@liaquatali007]

It's really amazing work I love snd easy understand

[@weedlax6938]

Thank you Kevin :)

[@akshayghadi6598]

Very informative video sir .big thank you 🙏

[@domainmojo2162]

"Can anybody remember the Cisco 1900 switch?.." L0L! Here I am - part of a crew running a small-medium sized ISP network... and some of our Broadband Wireless switches are Cisco 1900XL switches! We have 10 of 'em in active service!😀 They were bought way back in 2003 and served in various segments and capacities over the years. Of all the switches- including the old 2960s, 3650s etc- we've not had a SINGLE 1900XL fail EVER in our network- even when they were running in the core some 15 years ago. Kevin calls his 6509 "The box that rocks", I call these the "the pocket rockets!" 😀 Those things will never die! (unless you need more than 100Mbps of course..)

[@rasb1617]

great teacher, thanks for the video

[@alessandrobonifacio1209]

Sincerely THANK YOU🙏

[@c333ton]

Very-very informative! Biig thanks! 🙂

[@hamdiahmad6633]

Awesome, Thank You

[@gareginasatryan6761]

The first example you gave of the broadcast storm, why couldn’t the switch automatically detect the failure and turn off one of the fiber ports.

[@tkanazirtkanazir6034]

Rank 1 content, thank you!

[@BrokeAmerican2347]

Awesome thank you

[@PritamDas-pw4ne]

Excellent lecture as always. Requesting you for VPN deepdive and packet analysis right way.

[@refaiabdeen5943]

Cheers Mate.

[@nimarahmani207]

amazing

[@muhammedanwar3343]

Thanks much!

[@ariels5501]

Thanks for this video Kevin !! :) I thought that BLK state on 802.1W was similar to 802.1D, basically the port can receive BPDUs but not send BPDUs or update the MAC address table. Can you please clarify this for me?

[@luhmexico1607]

That's interesting to hear your story about Disney because I was on the team that installed those Cisco 2600 Catalyst switches on a project called the Walt Disney high-speed internet access project I believe it was 2001!

[@MansourSarr]

Great lecture 👌 but I have a remark at 44:58 when discussing stp convergence timer ⏲️ since gig0/2 of SW3 was receiving BPDUs every 2 secs through Sw2, I think the convergence time would be only 30secs not 50secs, I mean SW3 is still seeing the actual Root Bridge though Sw2 so his early blocked Port (Gig0/2) would became to Root Port immediately then transition immediately from Blocking to Listening to Learning then finally to Forwarding which would cost it 30 secs not 50 secs.

[@cajay4825]

it would be great if you can explain it with pcap!! tat would give much in-depth understanding as well. thanks

[@preezybeats6520]

how do you know what to multiply by regarding the primary and secondary when you changing the switches roots

[@dikimhd2555]

Hello Kevin, have you ever heard about mrstp (Multiple-process rapid spanning-tree protocol) ? what is that actually? is that same as rstp?

[@GaaraSama1983]

It's always switches all connected to each other. Never explained how it works in a more cascaded topology with several hops/switches in between. Let's say we have SW1-4. Connected like SW1 -> SW2 -> SW3 -> SW4. SW1 is the core switch and root bridge and SW4 an access switch. Does SW4 (with NO direct connection to SW1) see SW3 as his root bridge or is it also SW1 in the STP table? The SW4 -> SW3 connection will be the Root port, but will it also show the bridge ID of SW1 as the root or SW3?

[@JanezGaming]

Hi kevin is this the same as STP topics in a CCNP ?

[@Commenter9120]

gig 1\0\3 and gig 1\0\4 on switch a must be changed to \13 and \14?

[@MMTPproductionz]

I’m confused about your explanation at 37:40. Why is Switch B’s G1/0/7 a DP? Doesn’t the flow of BDPU’s have to exit the interface and follow the path to the root bridge? If it exits out of G1/0/7 to Switch C, isn’t the cost 4+4 = 8? Why is the cost 2? Can the DP interface G1/0/7 exit out of that Te1/0/1 on the same switch for a cost of 2? I thought the Gig1/0/7 has to exit and follow the path on Switch C Gig1/0/2. I’m not grasping this concept

[@preezybeats6520]

why did you multiply by 7 for the pvst + rapid

[@Emilia-fo6bu]

What do you mean 13 is less than 14? If we count those port numbers together both is 14?

[@Ohheythere-yl7si]

Not even trying to be obnoxious in the comments, but me and my BF were doing the nasty while he literally listened to this exact video, didn't turn it off or anything just kept listening xD

[@MariaGomez-lg2ug]

Which Is The Objective Of The Ports Designated In Stp If The Root Port Sends Bddu Also This Has Me Very Confunsed I Look And Search On Internet And I Do Not Find That Doubt??????????

[@FaisalMughal6037]

Switch 1 is a Root Bridge

[@chrislai0]

Would you help to add captions?

[@PRATIK7_6]

SW!

[@memem1792]

cisco security videos please

[@kwallaceccie]

Please check out our SCOR v1.1 course on Udemy. kwtrain.com/udemy

[@CMao54]

Why FAS0/3 of SW3 is designated port ? SW3 is not the Root Bridge

[@magnetitsolution296]

SW1

[@Aman2111]

Kevin is that dummy phone behind you or its live..

[@kwallaceccie]

Although it’s not currently connected to a land line, it’s a fully functional phone. It was the phone my parents had when I was born.

[@Aman2111]

@@kwallaceccie Wonderful... Do you belive in metaphysics??

[@cowboyspace1]

36:21 why did he say 13 to 11 and 14 to 10. isn't it 3 to 11 and 4 to 10?

[@cowboyspace1]

am i wrong here? i do not see anyone commented about this O_O

[@YouTubist666]

I agree. He spoke "13" and "14" when he meant to say "3" and "4". I believe it is a mistake.

[@lynbobo9130]

30

[@lynbobo9130]

11 because it has 10 at the end of equation

[@lynbobo9130]

1

[@lynbobo9130]

11

[@lynbobo9130]

D.

[@jacquelyncurrie7644]

how is 0011.bbda.ea00 a smaller number than 0014.69ac.2000? please make this make sense. time stamp 53:09

[@cillianpod]

I assume if you're reading the number from left to right, the first number is smaller due to its first octet being 11 while the other number starts with 14 in the first octet

[@lynbobo9130]

1