When Jeremy has a birthday party, everyone keeps buying him Cisco industrial routers. When he unwraps it he pretends he never got one before to make you feel happy. After the party he places each atop the stack in his closet. You would think he sells them off, but actually he keeps them all safe and in perfect condition, and he knows the MAC address of each one.
@v4gab0ndINNIT2 жыл бұрын
This is such a quality compliment 😂
@THEGREENAPPLEKID2 жыл бұрын
how did you come up with this
@anthonyomisorecanfixit2 жыл бұрын
Let’s actually get him a birthday present, or we donate after we pass our ccna exams
@marcwharton48032 жыл бұрын
@@anthonyomisorecanfixit I've now passed my CCIE written! All started with Jeremy's videos!
@t0ucheg00dsir2 жыл бұрын
I died. The comments section of this course are hiiillaaariouusss
@zakariabouguenara37283 жыл бұрын
I've enabled a BPDU GUARD FOR MY STUDYING FROM ALL OTHER CCNA COURSES your are our ROOT TEACHER
@JeremysITLab3 жыл бұрын
Haha, glad to hear that ;)
@jailnet5 ай бұрын
25:29 from the updated 1.1v specs :-> 2.5.d Root guard, loop guard, BPDU filter, and BPDU guard BPDU filter is not mentioned in video , so anyone studying for 1.1v don't forget to cover BPDU filter as well.
@ryanchan944Ай бұрын
They explain it later on on DAY 21 (part 2) BPDU Guard & BPDU Filter (STP Toolkit)
@nit2354 жыл бұрын
Tip on taking notes: > You can create a book with modules as sections, and topics as sub-pages. > You can take screenshots of video on the go with shortcut (windows): Shift + Windows key + S. It will copy the screenshot to clipboard, use ctrl + v to paste it in notebook. I used to learn CCNA from INE, ITPROTV, etc, I stopped learning from them once I found out this Jeremy's channel. It helps me a lot ,thank you Jeremy. Not only for CCNA, we will need your help even after that, why not CCNP. KEEPING GOING BY HELPING, NEVER GIVING UP IS THE BEST WAY TO MAKE OTHER'S LIFE BETTER.
@JeremysITLab4 жыл бұрын
Thank you Adam! And good tips!
@nit2354 жыл бұрын
@@JeremysITLab Don't thank me! I didn't do anything comparing to what you are doing for us.
@littlejin-n8x11 ай бұрын
can you share with me
@asfandshah66834 жыл бұрын
I’ve never commented on any youtube videos. But Hes so good and these lectures or so easy to learn that i felt guilty to not comment and support him through donation. Keep up mate. God bless you. 🇬🇧 🇵🇰
@JeremysITLab4 жыл бұрын
Thank you Asfand!
@emekaolele72064 жыл бұрын
@@JeremysITLab can I get your personal email
@user-ih6oe9ny3j6 ай бұрын
@@emekaolele7206 I don't think he's single
@imjinaah3 жыл бұрын
:D 0:01 Subscribe to Jeremy's IT Lab 0:36 Things we'll cover 2:04 Spanning Tree Port States 3:21 Blocking State 5:58 Learning State 6:51 Forwarding 7:20 Summary 7:47 Spanning Tree Timers 7:57 Hello 9:21 Forward Delay 9:44 Max Age 13:03 Spanning Tree BPDU 17:19 Optional Features of Spanning Tree (STP Toolkit) 17:31 Portfast 21:54 BPDU Guard 25:36 Spanning Tree Configuration 26:22 Configuring the primary root bridge 28:47 STP Load - Balancing 29:57 Load balancing quiz 32:13 Configure STP port settings 33:47 Things we covered 34:19 QUIZ! 37:42 BOSON
@masonisbetter3 жыл бұрын
I've been working my way through the Wendell Odom cert guide but was looking for some lectures to supplement it, these videos do a great job. Thank you!
@keasbeydave3 жыл бұрын
Wonderful in depth explanation of STP. The root port, designated port and especially the non-designated (blocking) port assignment process is broken down wonderfully.
@JeremysITLab3 жыл бұрын
Thanks, David :)
@diegocenicerosdominguez73095 ай бұрын
I get a headache every time after 40+ min videos taking notes and carefully reading but boy is it worth it, you are awesome Jeremy!
@jefferyaustin15714 жыл бұрын
Hi Jeremy, I got CCNA 200-301, Volume I and II Official Cert Guide and completed chapter 6. Without watching your videos and other sources in advance, I could not grasp the concept from each chapter. I would have to say that you are the Best! Please write CCNA books; be the best Author!!!
@JeremysITLab4 жыл бұрын
Glad to hear that! I may write a CCNA book, but that will be later in the future (you'll probably have you CCNA by then!)
@kneedeepinthedoomed4 жыл бұрын
I'm deeply grateful for your videos, Jeremy. Thank you!
@JeremysITLab4 жыл бұрын
Thank you, I'm glad you like them :)
@anthonyc193 жыл бұрын
21:15 This actually happened to me before. Took all day to track it down. It was hidden behind a desk. Madness.
@sumitsingh-ys6ew3 жыл бұрын
thank you jeremy, i can't find the words to tell you how much grateful am i : )
@adrenochromeaddict42326 ай бұрын
if your just studying this ccna now includes portfast, root guard, loop guard, BPDU filter, and BPDU guard. cheers
@travelandexplorebd8962 Жыл бұрын
The more I have been watching your video the more I am being debt to you. Thanks, my professor.
@littlewonder86413 жыл бұрын
Thanks Jeremy for your awesome video material with abundant coverage. You are simply a great teacher with clear dispatch of knowledge. Please keep on your great job.
@JeremysITLab3 жыл бұрын
Thanks Anil :)
@rotrose75313 жыл бұрын
Thank you SO much for making STP so easy to understand
@Versesmith3 жыл бұрын
I was really struggling to understand this concept. But your videos made it simple for me to get it. Thaank you so much Jeremy. You are the bestttt
@JeremysITLab3 жыл бұрын
Thanks :)
@erikcarlin95389 ай бұрын
🎯 Key Takeaways for quick navigation: 00:30 *🌲 Spanning Tree Port States and Timers* - Explanation of spanning tree port states: Blocking, Listening, Learning, and Forwarding. - Overview of the timers used in spanning tree protocol. - Clarification on the purpose and duration of each port state and timer. 07:49 *⏲️ Spanning Tree Timers* - Detailed explanation of spanning tree timers: Hello, Forward Delay, and Max Age. - Discussion on how these timers influence the behavior and convergence of spanning tree protocol. - Insights into the role of timers in preventing network loops and ensuring stability. 17:37 *🛠️ Optional Features of Spanning Tree* - Introduction to optional spanning tree features like Portfast and BPDU Guard. - Explanation of Portfast and its benefits for end-host connectivity. - Overview of BPDU Guard and its role in preventing loops by shutting down interfaces upon detecting BPDU traffic. 22:44 *🛡️ BPDU Guard and Portfast* - Understanding BPDU Guard and its functionality on portfast-enabled interfaces. - Enabling BPDU Guard globally requires a different command syntax than enabling it directly on interfaces. - BPDU Guard disables a port when a BPDU is received, preventing potential network issues. 24:08 *🌐 Optional Spanning Tree Features* - Root Guard prevents a switch from accepting a superior BPDU on a specific interface, maintaining spanning tree topology. - Loop Guard disables an interface if it stops receiving BPDUs, preventing unidirectional link issues. - While optional, knowing about Root Guard and Loop Guard is beneficial, although not explicitly required for the CCNA exam. 25:30 *🔄 Spanning Tree Mode and Root Bridge Configuration* - Overview of spanning tree mode options: MST, PVST, and Rapid-PVST. - Configuration steps to manually set the root bridge and secondary root bridge. - Explanation of how different VLANs can have different root bridges for load balancing purposes. 32:17 *⚙️ Spanning Tree Port Settings* - Explanation of spanning tree port settings: cost and port priority. - Cost determines the root port and is used in selecting designated and non-designated ports. - Port priority, configured in increments of 32, serves as the final tiebreaker in determining the root port. 34:43 *📝 Spanning Tree Quiz and Practice Questions* - Quiz questions covering spanning tree concepts learned in the video. - Practice question from Boson ExSim regarding PortFast configuration and STP port ID interpretation. - Importance of understanding the rationale behind correct and incorrect answers in practice exams like Boson ExSim. Made with HARPA AI
@susantadas25339 ай бұрын
undoubtedly the best teacher for ccna. even todd lammle wont deny.
@maxwellchessdotcom69523 жыл бұрын
Great video Jeremy, a best of the best.
@JeremysITLab3 жыл бұрын
Thanks :)
@notunknown82754 жыл бұрын
i just want to thank you for this great course and also for the subtitles is now more accuracy .
@JeremysITLab4 жыл бұрын
Thanks for watching and commenting :)
@ActionzvanNeshie114 жыл бұрын
Best tutor ever, thanks so much Jeremy
@JeremysITLab4 жыл бұрын
Thank you!
@hmoff17112 жыл бұрын
it is also worth noting that the spanning-tree root secondary command sets a static value, unlike the primary command, which dynamically adjusts to the situation
@robotname4382 жыл бұрын
Aren't 4:24 and 12:47 contradicting each other? In 4:24 it is mentioned that only interfaces with designated or root ports may enter the listening or learning state and in 12:47 quote 'A blocking interface (i.e. non-designated) cannot move directly to forwarding state. It must go through the listening and learning states'. Thanks for the content btw.
@wafa12032 жыл бұрын
I think in general when the interface moves from blocking to forwarding it will have to move through listening and learning before becoming forwarding state and vice versa when interface moves from forwarding to blocking state it will have also move through listening and learning state
@robotname4382 жыл бұрын
@@wafa1203 Hey, thanks for the answer. You are right about the blocking port moving to the listening and learning states, but the interfaces in forwarding can instantly move to blocking state. I guess that Jeremy when saying what he said in 4:24 meant that ports when they are just plugged in and converging that they have to go through listening first, and that they don't start off from blocking
@faizaussi3524 жыл бұрын
Many thanks to u Jeremy. U really are a blessing ❤
@JeremysITLab4 жыл бұрын
Thank you Faiza :)
@jailnet5 ай бұрын
A certain swtich in a STP topology reconsider STP choices. Some of the ports on the switch become designated and other become non-designated in 50 seconds. Explain why in STP convergence process a switch requires 50 seconds to change port status(Assume STP timers are default). ->STP convergence on a switch occurs when Max Age timer expires 20 seconds. ->designated to non-designated is immediate after Max age timer ->non-designated to designated requires 15 seconds (Forward delay timer ) transitioning to listening state then 15 seconds for learning state (30 in total) -> Total time required for STP Switch to change port status 30 + 20 = 50 seconds
@BalancednBeautiful Жыл бұрын
hey Jeremy , thank you so much for your videos . I am new to networking and the way you explain the different protocols make it so easy to understand . I will continue to reference your videos . I'm scheduled to take my test and I cant wait to type in the comments I passed .
@SesegB11 ай бұрын
Have you passed your test?
@BalancednBeautiful11 ай бұрын
Yes I passed 12-18-23 🎉🎉
@jailnet5 ай бұрын
4:40 Explain why only Designated port / root port enter listening state ->When interface changes from non-designated to designated port/root port ->transitions from blocking state to forwarding state ->hence blocking -> listening -> learning -> forwarding Is this correct??
@3err0 Жыл бұрын
4:25 "after the blocking state". you mean when an interface was non designated and in blocking state, and when it suddenly becomes designated/root for some reason, then it goes to listeting state ? edit : it looks so ,yes. 12:04 also i would add at 11:40 - after ceasing to recieve hello bpdus OR receiving less superior bpdu it was receiving before
@sinosha Жыл бұрын
At 32:00. On that topology, which two PCs are on VLAN10 and which ones are on VLAN20?
@tiary114 жыл бұрын
hi Jeremy, excellent course, like usual :-)
@JeremysITLab4 жыл бұрын
Thank you :)
@وحیاللهاسدی3 жыл бұрын
I was right about the BOSON question it is all access Thank a billion for this material
@JeremysITLab3 жыл бұрын
Thanks for watching ;)
@qiandavid8964 Жыл бұрын
Best CCNA Course I've Ever Seen
@Amiri-Nofel4 ай бұрын
Jeremy, interfaces in a blocking state do physically receive network traffic from other switches' designated port, but choose to ignore it since they are in a blocking state
@toniatfort567 ай бұрын
Hi Jeremy. Thanks for the clear tutorial and easy to understand explanations. You make it seem easier
@creumakuzola42273 жыл бұрын
Sir, your videos and your didactic are amazing. Thank u so much for making these videos!
@JeremysITLab3 жыл бұрын
Thank you :)
@TheFox33004 жыл бұрын
i just checked my lab and online and it only seems to say PVST is default for switches not RPVST, how 'new' is new cisco switches being default RPVST? (26:00 for time reference) Thank for this! just want to check in case asking on exam
@JeremysITLab4 жыл бұрын
I doubt questions like this will be asked on the exam. But for example, a Cisco Catalyst 9300 switch running 17.4.x defaults to RPVST+: www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/17-4/configuration_guide/lyr2/b_174_lyr2_9300_cg/configuring_spanning_tree_protocol.html#concept_swq_sv5_jgb I didn't check other models/versions, that's just an example.
@arionrares77644 жыл бұрын
Hello! So for a better understanding. At 4:33 you said that only Designated or Root ports enter the Listening state. So in this case all the ports can be in Blocking state, not just the Non-designated ports, right?
@JeremysITLab4 жыл бұрын
No, only non-designated ports will enter a blocking state.
@arionrares77644 жыл бұрын
Jeremy's IT Lab ok, thank you :)
@shivanandpatil41934 жыл бұрын
Thanks a lot. Great video s for CCNA certification. God bless you
@JeremysITLab4 жыл бұрын
Thank you for your kind words :)
@TheGunguy4614 жыл бұрын
On the chart that appears at 7:45 in Max Age you have "BDPUs" instead of "BPDUs".
@JeremysITLab4 жыл бұрын
Thanks for pointing that out 👍
@jayydon2 жыл бұрын
Anybody able to explain why at 10:05, SW2 G0/1 has been made the Root Port and not G0/0? I assumed failing root cost, the Lowest neighbor bridge ID will prevail. Thanks guys.
@robotname4382 жыл бұрын
They have equal root costs, but the switch to which g0/1 interface is connected has a lower BID than the switch to which g0/0 is connected. BID is a tiebraker in case both interfaces have equal costs and the port ID is a tiebraker after that (lower port ID wins)
@jacksonrabson2634 жыл бұрын
There's smile on my face now,thanx Mr Jeremy my Gog bress UUUUUUUUUUUUUUUUUUU
@JeremysITLab4 жыл бұрын
Glad to put a smile on your face ;)
@jacksonrabson2634 жыл бұрын
Thanks once again:
@sainikileshreddy13274 жыл бұрын
@jeremy first of all i would like to say that the videos are good and understandable. A request from my end, can you do a video on how to identify root port, designated /un-designated port.
@JeremysITLab4 жыл бұрын
Check out Day 20 - STP Part 1, I talk about the whole process of identifying! From 31:20 I give a summary of the process: kzbin.info/www/bejne/oF7FfGB7e9lsmbs
@opst17048 ай бұрын
Question 9: 36:45 Without indication of a number system, how can I be sure that the answer is 128? The answer could also be 80 if it's written in hex. Someone already asked this question 2 years ago, but it is buried now.
@sobayinichirinda52443 жыл бұрын
Thanks Jeremy, you're the best tutor ever👏
@stephenhu1189 ай бұрын
Best teacher ever! Today I just bought the Boson ExSim + NetSim combo (via your short link of course 😀). The NetSim is awesome. Just a suggestion, it would be great if you could also add in each video's description which NetSim labs we can try to reenforce the knowledge we learned in that video.
@CatVi062 жыл бұрын
What a great explanation of the STP proccess, it has very usefull to improve my understanding about this technology. If I may, I would like to recommend reading "An Algorithm for Distributed Computation of a Spanning Tree in an Extended LAN" by Radia Perlman.
@gracelesstarnished573 Жыл бұрын
Hi Jeremy, great video as always. One question: If a port in a Blocking state SW2's G0/0 (Non designated) can receive BPDUs, why the Max Age Timer didn't reset in this case? 11:28
@oosowl522 Жыл бұрын
did you find the answer?
@gracelesstarnished573 Жыл бұрын
Not yet bro. Currently, studying OSPF
@oosowl522 Жыл бұрын
@@gracelesstarnished573 Well i think i find it , it has something to do with the interface itself not the switch . the g0/1 interface will not reset the timer in this case cause it's not receiving any hello BPDUs . That's what i think and he mentioned it in the table in the next slide i think. Hope this helps.
@hariharan-yi8tf Жыл бұрын
37:48 -> but loop guard also does that, infact it will not shutdown like bpdu right
@naumanmustafa42454 жыл бұрын
Hello, You mentioned at 18:04 that the port connected to the end host will be up after connection in 30 seconds, moving from listening to learning to forwarding, my question is why would it skip the blocking state (20 sec). What state the port achieves as soon as it starts up...? Looking forward for your reply.
@JeremysITLab4 жыл бұрын
When a port first comes up it will move to the listening state. After that it will either move to learning then forwarding, or into the blocking state.
@shlomiunger35184 жыл бұрын
At 11:30, I presume SW2's G0/0 interface will now become the root port, but what state will G0/1 enter now? Non-designated? I guess I'm asking; switch ports that have no device currently connected to them, are they in any STP state at all? What's the default state of such interfaces?
@JeremysITLab4 жыл бұрын
The interface will be down, so it won't have any STP state. I think technically the state is 'disabled', but it won't appear in the output of 'show spanning-tree'.
@HazratJon11 ай бұрын
Hello Jeremy, I am not able to understand why the "vlan" is always mentioned at 28:09 STP Configuration - Root Bridge, would you mind to tell which video I must watch to understand why the "vlan" is mentioned in STP Configuration
@fron545519 күн бұрын
6:46 i dont get it, sir you said previously that an int. in Learning state does not send or receive regular traffic and after that you say that an int in a Learning state LEARNS mac adr from REGULAR traffic that arrives on the interface(int). It means that switch with int in a learning state receive regular traffic. I am confused 🤔 and sorry for my english if i have mistakes.
@tariqsubhan37752 жыл бұрын
Sir, you deserve more but I can't do more than a comment, like, share and subscribe! I mean it...
@konefine36264 жыл бұрын
Best lecturer, thank you so much.
@JeremysITLab4 жыл бұрын
Thank you! Always appreciate your support :)
@bhuvaneshgifta3513 жыл бұрын
Really fantastic brief explanation about STP operation process. Thanks a lot.
@JeremysITLab3 жыл бұрын
Thanks Bhuvanesh :)
@frederickmorgan67834 жыл бұрын
Im loving this series.
@JeremysITLab4 жыл бұрын
Thank you :)
@hasanabdoun58454 жыл бұрын
i want to complete this course ,you are only one who am i understand what he says and you explaining everything so good but we need to finish this course as soon as possible to be certified please
@JeremysITLab4 жыл бұрын
Hi Hasan, I will try to finish it quickly, but high quality is more important than speed for me
@muhannedbelaid88494 жыл бұрын
May god bless you bro. Thank you so much for giving us these information and devote your time to do these videos.
@JeremysITLab4 жыл бұрын
Thank you Muhaned :)
@jafaboarder2 ай бұрын
Why is the source before the destination in the BPDU ethernet header @ 13:14 ?
@wwolfram333 жыл бұрын
At 3:15, it is stated that an interface that is activated or blocking port must transition through listening & learning to a forwarding state due to changes in the network topology. Then at 4:30, it states - After the blocking state, interfaces with Designated or Root port roles enter the listening state. Only Designated or Root ports enter the Listening state... Can you help clarify this? The 4:30 statement hints that blocking ports will not enter the Listening state (but it should if topology take place). Thanks!
@JeremysITLab3 жыл бұрын
Sorry I don't understand what part isn't clear. For ports to enter the forwarding state they must transition through listening and learning states.
@wwolfram333 жыл бұрын
@@JeremysITLab Thanks for your videos Jeremy, they are excellent. at 4:30, it states that "After the Blocking state, interfaces with a Designated or Root role enter the Listening state". Are we assuming that if a interface is currently in a Blocking state, and after future STP calculations it will be changed to a Designated or Root role? Any guidance where I am missing something here would be helpful. Thanks!
@robotname4382 жыл бұрын
im stuck at the same moment friend
@andrejfedorko5332 жыл бұрын
@@JeremysITLab Hi Jeremy, first of all many thanks for a great video series. I also find this statement confusing: "After the blocking state, interfaces with Designated or Root port roles enter the listening state. Only Designated or Root ports enter the Listening state". For me this implies that blocking ports never enter Listening state. Isnt the listening state a state in which further state is determined? Like if it goes on to Learning or back to Blocking. Thanks.
@NTTGoddess4 жыл бұрын
29:50 The default priority should be 32770 in stead of 32769, isn't it? Since the default bridge priority is 32768 and vlan id is 2. Anyway, love your videos. Thank you so much!
@JeremysITLab4 жыл бұрын
Yes that's right, thanks 👍
@admirableme2453 Жыл бұрын
26:54 when you open SW3 and set it primary it shows pri : 24577 but in slide diagram SW3 priority is 32769 , why its changed when you open SW3 config
@8124K-u4x7 ай бұрын
did you figure it
@Recken110 ай бұрын
I've had spanning tree issues with IP Phones where a user will plug in the 2nd port, meant for a PC, into another network jack at their desk. End hosts can cause STP issues.
@kayitbilgileri2 жыл бұрын
Thank you for your great series of videos on Networking.
@المعرفةللجميع-غ9ل4 жыл бұрын
Hey Jeremy thank for the courses but what's the number of video not presented yet in the serie and I say it again thank you
@المعرفةللجميع-غ9ل4 жыл бұрын
Thank you *
@JeremysITLab4 жыл бұрын
I think the course is about 50% complete, there will be many more videos!
@naveenjoseph9727 Жыл бұрын
Hi Jeremy, Awesome videos! I got a doubt:: In 29:27 of the video, we are using VLAN2 for the topology. so wouldn't the Bridge Priority in each switch becomes 32770 ?. because Default bridge priority= 32768 and Extended System ID(VLAN ID) = 2. So TOTAL BRIDGE PRIORITY= BRIDGE PRIORITY + VLAN ID = 32768+2 = 32770. plz correct me if I am wrong.
@katehyeeunjeong5230 Жыл бұрын
Hi Jeremy, Thank you for sharing this. I just wondering if i can have all of these slices. thank you
@zammanshafi21583 жыл бұрын
Big fan Mr jeremy. Consider: a router is dhcp server for vlan (33 and 82) . Inter vlan routing is configured on Router int gig0/1.... How can i configure router int gig0/2 , so if gig0/1 goes down the gig0/2 become active for inter vlan routing
@JeremysITLab3 жыл бұрын
You'd need to configure separate VRFs on R1 (split R1 into two routers). That's a more advanced topic.
@MsAsdflol5 ай бұрын
29:10 So that means the hosts are both in VLAN 1 and VLAN 2? I think it might be misleading, other than that ur videos are super cool
@iragenavital8899 Жыл бұрын
I like your video of CCNA, it is helping to understand networking
@Dreambig66366 ай бұрын
GREAT HATS OF
@MAbdilahi4 жыл бұрын
hello, Jeremy thanks a lots for sharing this knowledge.
@JeremysITLab4 жыл бұрын
Thank you for leaving a comment :)
@yeaight43634 жыл бұрын
@@JeremysITLab hi, can you please leave a download link for the your PowerPoint? I can read english better than listen. I am still trying to learn english thank you
@SoulScavenger3 жыл бұрын
Hey Jeremy, I just practiced applying different settings to switches in my lab in Boson and the switch which I set priority of 0 for that vlan becomes the root bridge after I set root primary on the other switch. It looks like setting the switch priority of 0 supersedes whichever priority of the root primary switch. Long story short - the command to permanently set a switch as a root bridge is spanning-tree vlan xx priority 0, NOT spanning-tree vlan xx root primary.
@JeremysITLab3 жыл бұрын
As explained in the video, the command sets the priority to 24576, or 4096 less than the current root. If the current root has a priority of 0, it can't set the priority to less than that so the command will fail.
@syamtube123 Жыл бұрын
In 2007, I passed my CCNA exam. in 2023 I understand what is CCNA........... Lol😄
@princeabdoulmadjidekpa6208 ай бұрын
😂seriously
@nasaidris7777 Жыл бұрын
I have a question. In minutes 4:56 you said Non-designated port are always Blocking, yet in 12:10 point number 3 you said if a Non-designated port is selected to become a designated or root port. Isn't this clash between what you said. Please help me to understand this. Thanks
@nasaidris7777 Жыл бұрын
And in 13:01 you stated that "A blocking interface cannot move directly to forwarding state, it must go through the listening and learning states". But a non-designated port (blocking port state)will always stay in blocking state. So how will they move to listening state if they must ALWAYS stay in blocking state.
@Matthew25405 Жыл бұрын
@@nasaidris7777 You have probably found the answer already, but of course non designated ports can move to the forwarding state, otherwise STP wouldn't provide fault tolerance. In the beginning he probably meant that when a port is in the non designated state is always blocking, but then it can move to the forwarding state by going through the listening and learning states
@enastase82034 жыл бұрын
Thanks again for your hard work..
@JeremysITLab4 жыл бұрын
Thanks Emil, I appreciate your comment :)
@AndreyPrestes3 жыл бұрын
Excellent class bro! Thank you
@st106893 жыл бұрын
Hey Jeremy! I have three questions. 1) At 9:44 the duration of Max Age Timer is 20 seconds but there is also 10* hello. What 10* hello means? 2) At 13:10 I don't understand the thing about the destination MAC address for the BPDUs. Is it mean that all switches (expect the root bridge) will be in a group let's say, and that group will be associated with that specific MAC address meaning all switches will receive the same message? I really don't get it, please explain. 3) Root guard. As I understand this feature can be somehow a security feature, so if someone plugs a new switch in our topology and has lower bridge priority, our root bridge will not accept it as the new root bridge. Yes but what about the other switches in the topology? If they receive a BPDU from the new switch, will they accept it as the new root bridge?
@JeremysITLab3 жыл бұрын
1) It just means 10*the hello timer, which is 2 seconds. 2) That type of MAC address is called a 'multicast' MAC address, it's not addressed to any particular host. Switches running STP will 'listen' for frames with that destination MAC address and process them when received. If a switch not running STP receives a frame with that destination MAC address, it will just ignore it. 3) If those other switches aren't connected to the new switch, it's not an issue, the switch that receives the BPDU won't forward it.
@ivagar19823 жыл бұрын
Hi Jeremy, Is PVST+ dest mac address a multicast address?
@JeremysITLab3 жыл бұрын
Yes, that's correct!
@stephenapenkwah4 жыл бұрын
The best. Thank You Jeremy.
@JeremysITLab4 жыл бұрын
Thank you!
@mkhlafa68094 жыл бұрын
Thank you so much Jeremy! Great course
@JeremysITLab4 жыл бұрын
Thank you :)
@austinaaron70182 жыл бұрын
29:28 the priority for vlan 2 should be 32770 right?
@murraymackenzie4313 Жыл бұрын
Hi Jeremy, brilliant content. Question: is there ever an incentive to not use BPDU Guard on a port if it is an available option? Thanks again.
@huggiessupriem4 жыл бұрын
@Jeremy's IT Lab Roughly how many videos will be in this total complete course? Or better yet how much of the CCNA have we covered up to this point? Many many thanks in advance for all your hard work.
@JeremysITLab4 жыл бұрын
I think the course is about 50% complete, I'll probably finish it at the end of this year or early next year.
@stephenapenkwah4 жыл бұрын
@@JeremysITLab thank you
@landwelove4 жыл бұрын
@@JeremysITLab Oh! no I'm want to take my exams in February next year
@st.clairjrharris42113 жыл бұрын
Thank you Sir! I understand very easily with your videos.
@mohammadrahal97464 жыл бұрын
Hi Jeremy, thanks alot for the comprehensive information. I have a question please , is it possible to disable the STP on one port ? Like taking one port completely out of the STP process
@JeremysITLab4 жыл бұрын
I don't think it can be disabled on a per-port basis. But you can disable it on a per-VLAN basis, with this command: SW(config)# no spanning-tree vlan (vlan-id)
@mohammadrahal97464 жыл бұрын
@@JeremysITLab appreciated, thanks alot
@yt.aayushchapagain5 ай бұрын
@Jereemy's IT Lab : Is the path cost added at the receiving interface or the forwarding interface?
@moienanwari Жыл бұрын
Amazing, thank you so much for all your efforts,
@unrealriot3 жыл бұрын
Hi Jeremy, i've seen the command 'spanning-tree portfast trunk' , on 21:30, if you configure this command on SW3 and SW2, do you still need to set the BPDU guard to prevent loops?
@JeremysITLab3 жыл бұрын
Yeah you still need it. Portfast has the risk of causing loops, it doesn't prevent loops, whether it's enabled on an access port or a trunk port.
@muhammadirshad3764 жыл бұрын
switch A is connected with multi layer switch C which is working as router on vlan 3 and Switch B is connected with multi layer switch D which is working as router on vlan 3 and switch A and B is connected together and Switch A root bridge.My question is that in this scenario when we connect mistakenly multilayer switch C with multi layer switch D on vlan 3 why we observe flapping???
@JeremysITLab4 жыл бұрын
Sorry, what time in the video are you asking about?
@omid8719 Жыл бұрын
Hi Jermy, Thanks a lot for your help could you please help me with this question " Which configuration ensures that the switch is always the root for VLAN 750 1- Switch(config)#spanning-tree vlan 750 priority 0 2-Switch(config)#spanning-tree vlan 750 root primary
@ghamari6 ай бұрын
Another great video. Thanks Jeremy
@-b777ljq33 жыл бұрын
very good lecture, many thanks.
@sujitsubba52894 жыл бұрын
Very nice Jeremy ... I love your videos.. how many video still needed to complete the full course ?
@JeremysITLab4 жыл бұрын
Thank you! I think the course is about 50% complete at the moment.
@johnlomu4 жыл бұрын
Great job Jeremy, keep up the good work.
@ssiomos4 жыл бұрын
What about switch ports that are connected to Wireless Access Points? Can/Should we enable portfast on them?
@JeremysITLab4 жыл бұрын
You can! If it's a trunk port you'll need to use 'spanning-tree portfast trunk'. I'll cover wireless later in the course.
@ssiomos4 жыл бұрын
@@JeremysITLab Thanks a lot, Jeremy. BTW, best span tree explanation I have seen for ages. Thank you. Looking fwd to the Rapid STP+ lessons.
@umairm85954 жыл бұрын
Thanks Jeremy your videos are very helpful
@JeremysITLab4 жыл бұрын
Thank you, I'm glad to hear that!
@mohammedayad1041 Жыл бұрын
26:04 are you sure they run rapid pvst by default ? i looked it up and it says they run pvst.