The Spanning Tree Protocol Explained

[iaminunderworld]

Sweet Voice you Got!!!!

[tyler361549]

The designated port on switch B is chosen because it has a lower priority not because it has a lower cost.

[glg216]

loved the vid, thank you

[2010superfunny]

Incredibly simple and lucid explanation to a complex topic. Hats off to you.

[derpanierer]

:-D I'm German, and you finaly Explained what noone was able to explain Simple. XD Thanks for that!

[Waqar78662]

HI, I just started CCNA course and I find it very difficult. Can you please give me your msn addres so i can talk to you through there. Thank you

[ultraj362]

I liked the video, thanks!

[daankragt]

Simple, clear and quick understanding. Bad camera work though ;)

[NetworkingExamAcad]

@daankragt ya I know ;) I'm looking into buying a huge white board soon, so hopefully I can use that to make some better videos!

Thanks for watching though and leaving a comment :)

[siasatgame]

Very well explained, I have watched quite few Videos on STP but the way you explained really solved the myth.

Thank you

[lfh003]

To berkeleycowboy, part two: The lowest-cost switch on each segment is called the designated bridge, and that bridge's interface, attached to that segment, is called the designated port. Switches that are not designated bridges have the nondesignated ports placed in Blocking State...now there should be not loops in the system.

Thanks for listening.

[lfh003]

To berkeleycowboy: Blake is conveying some of his immense knowledge and experience about STP...Youtube only allows so much material to be presented (time-wise). Spanning-Tree Protocol uses an algorithm to set up the loop-blocking: First the election of the Root Bridge (Blake does not have time to explain that you can make a switch of your choice to be the RB). Next, each non-root bridge will determine the least cost path ot the Root Bridge and select the switch's root port. I'm out of characters

[berkeleycowboy]

You blazed over the determining the Designated Ports. In the video you just pick one. How is it done in real life?

[siasatgame]

@berkeleycowboy

Designated port are those ports of Root-Bridge that are connecting root-bridge with other Bridges with lowest cost. Remember Designated Ports are only from Root Bridge and Root Ports are always from non-root-Bridges (switch).

However the Lowest cost is common value to elect Root and Designated Ports. 

[fareekhan122]

helo.

thankx bro. it has been informative. I appreciate the way u have explain each step.

thankx again

[LucaFish91]

can u explain about RSTP , or can i have the link if any :D thanks dude

[AktionT4]

Let me correct my typo -- because B has a "higher" MAC address than C it is elected to host the designated port on the segment between B and C. Not because of any function of costs. C hosts the blocked port because it has the "lowest" MAC address on the segment between B and C. Sorry for the confusion in my last post.

[AktionT4]

Everything here is correct - except for your statement with regard to the port assignment with the segment between B and C. The port on C is blocked and the port on B is designated - but not because of the lower cost, but because B has the lower MAC address.

[haliscanmohur]

@AktionT4 I'm just going to write that. You are correct not because of lower cost. The costs are the same.

[RaidenHeaven]

Nicely done !! I'm doing CCNA here.

2 things I got from you is "Bridge" means "Switch" and how Root Ports are chosen.

[JPGetter]

Great video!!! Easily broken down into simple terms. Do you have a video showing STP with VLANs?

[lara72183]

Thanks! I've been learning about STPs for 2 years now and I haven't fully understood them until now!

[NetworkingExamAcad]

@lara72183 no problem I'm glad you finally get it! I appreciate your comment too. It really makes me want to make more videos like this.

[mackbrown4pres]

Great video...thanks.

[NetworkingExamAcad]

@mackbrown4pres Your welcome ;)

[ajithmkerala1234]

Bridge Protocol Data Units (BPDUs)

[h8uall66]

Wow, my Cisco books make that seem so complicated, but the way you just described it is so simple! I can finally get past this chapter and move on. Thanks!

[booduh099]

@h8uall66 be very careful with the statement you just made. It is not that Cisco books made it complicated, it is that you are not fully understanding the point that it trying to br brought to you. Draw out at least 6 switches and link them all together with redunant links. Mark out all the links. Then erase all the blocking links, if your topology still has loops, than you do not fully understand spanning tree. Then you will have to test this on real equipment. Rack Rental if you need to

[h8uall66]

@booduh099

You realize that my comment was made two months ago, right?

[booduh099]

@h8uall66 Why does it matter if the comment was made 2 years ago. The benefit of the comment will assist any one who reads it. A comment made 2 years ago has the same impact as if it was made two minutes ago. Especially since the comment is accurate. Comments is for every one to read and learn from.

[h8uall66]

@booduh099

If you're just trying to provide general help then why make your comment a response to mine at all? My point was that this "issue" was resolved 2 months ago. I was merely telling the author of this video that my books made it seem confusing and that he did a good job of resolving the confusion. Your response really adds nothing to that and makes a number of unfounded assumptions.

[booduh099]

@h8uall66 Ok dude, so you say, the chain ends here.....My point was valid, take it or leave it, but you are not pulling my into your discusion on why I responded to your comment. If you found the comment to be irrevelant, than ignoring it is all you had to do. The take the enegry to debate on why i posted is a waste of energy.....Good luck at your studies....I have studying to do :)

[starguard]

That was very well displayed. You professionalism is truly something to be commended

[megustaface]

Question about designated ports. When you chose the port for switch B you said you went with the one with the lowest cost. It only had one unused port that led to the root switch so that makes it the choice by default right?

[manopsteel]

this is nice and very easy to understand...

[drazik37]

Dude! Thanks for your time and explanations. Keep up the good job

[justfourthen]

okay now am a bit more confused do VLANS use STP or VTP?

[NetworkingExamAcad]

@justfourthen VLANS can use both actually. STP is used to keep loops from forming between all the switches in your network and VTP is used to aid in the management of switches by propagating all your VLAN information between all of your switches.

[dAsZ92]

Exelent , Thanks you bro :D

[NetworkingExamAcad]

@dAsZ92 Thanks!

[deathvalleyjoker]

Great video! Really clarified things. One question though: how did you determine the port on SwitchB in the B-C segment is the DP? You said it has the lowest cost route to the RootBridge, but aren't all the links equal? Can you expand on this?

[NetworkingExamAcad]

@deathvalleyjoker ya when they have equal cost links they use the lowest mac address. 

[shahroozkl]

thanks Blake , you teach me stp better than cisco online academy (:

[NetworkingExamAcad]

@shahroozkl wow crazy, thanks for saying that.

[TheBrookson]

Really helpful - I didn't realise how simple the concept was until I watched this video

[NetworkingExamAcad]

@TheBrookson Awesome I'm glad I was able to help. Thanks for the comment too it makes me want to make more videos to help you out even more. In fact is there anything else you would like me to explain in a video?

[respectxtimes777]

@NetworkingExamAcad id like to see explained how pvstp+ and rstp work together, cause im having problems understanding how they exchange packets and synch? tnx in advanced

[NetworkingExamAcad]

@respectxtimes777 that's a great idea! I've been wanting to make some more videos so when I make my next video I will definitely do it on pvstp+ and rstp.

[Don70rEnZ0]

@TheBrookson Exactly what I thought. Great work 5/5!

[NetworkingExamAcad]

@Don70rEnZ0 thank you, I really appreciate it!

[elangrafe]

Very nice and concise video! It helped a lot! Tks!

[NetworkingExamAcad]

@elangrafe THANK YOU! 

[1218Haley]

This was great, thx

[NetworkingExamAcad]

@1218Haley Your welcome :)

[kuglimz]

good short trip into STP

[NetworkingExamAcad]

@kuglimz Thanks!