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Free CCNA | Switch Stacking vs Chassis – Day 39 | 200-125 | Cisco Training

Cisco Certified Network Associate day 39
welcome back everyone I’m IMRAN RAFAI your trainer for this entire series
today we’re going to discuss switch stacking versus chassis aggregation and
this is part of icnd2 topic so without wasting much time let’s get straight
into today’s class and before we go ahead click on that subscribe button and
then click on that bell icon to be notified whenever we upload a new video
and also please click on that like button under this video which would make
us very very happy ….we have our company social media contacts on the left
my personal social media contacts on the right and my email address is given here
so anybody who wants to contact me please feel free to contact me on “[email protected]”…. like I said today we’re gonna look at the benefits
of switch stacking vs chassis aggregation….. this is part 1.6
of icnd2 exam topics…. so in a typical world when you’re looking at designing a
network we would…… let’s say you are designing a new network and you come
up with a design layout and then you realize that each floor you need about
100 computers so that means all the access switches….. so let’s say in this…
these are access switches and these are distribution switches if you know
Cisco Three layer hierarchical models…. core distribution and access layer devices….. so
on each floor we need hundred devices now you need to make a decision between
two things how are you going to achieve this because each switch on an access
layer switch you would have about 24 ports so if you want hundred ports right
you need to have five 24 ports switches right so you need to decide whether you
need to go that way we have more numbers of small switches or you have one large
switch where you have maybe a switch with hundred volts right so it’s
definitely not part of your IC in the one eyes you do to to discuss such large
switches but you can get a switch with hundred
ports that’s possible so we need to make that decision whether we need to go with
a lot of small switches or one large switch right both of them have their own
advantages and disadvantages the advantages of having one switch with
hundred force is that you need to have one you just have to manage only one
switch you don’t have to manage 10 different switch or five different
switches right but the same point the disadvantage of having that one switch
is there’s only one single point of contact right so that single point of
contact is if anything fails on that switch the whole network goes down but
on the other hand if you have five switches with 24 ports if one of the
switches fail right there’s a chance of one switch failing but there’s very
little chance of all fives which is failing but let’s say one switch fails
the four switches are still working so that means the remaining ports are still
working so your entire network is not down but the disadvantage like I said is
you have to have to manage five different switches right so you have
disadvantage an advantage in either case that’s something that you need to make a
decision so typically what you would do is when you have let’s say in our
example here so you have a 1 a 2 a 3 and a 4 are for access layer switches and
these for access layer switches are connected to two distribution layer
layer 3 switches right now each of these access layer switches have to be
connected to both the distribution layer switches so if you know the Cisco three
layer architecture we spoke about that in one of our old videos it tells that
you have the low switches or a low grade or low powered switches on access layers
then you have a little higher capacity switches in distribution and then you
have the really really powerful switches sitting on your core right so now here
in this case we are looking at Axley and distribution layer so each of these
access layer switches are connected to both these distribution layers which is
so if you only consider a 1 a 1 has a wire connected
and d1 showed these three right between these three one of the ports because of
STP one of the port will get blocked STP will block one of the ports similarly a
to all to one of the ports will get blocked STP again a three one of the
port will get blocked because of STP and a four one of the ports will get blocked
due to STP so technically you’re not using the entire bandwidth of switches
so it’s you have two links one of the link is always down right so that’s
that’s one of the problems so typically when you have four switches and let’s
assume this is on the same floor so typically they would be sitting on one
rack like this so you have switch one switch to switch three switch four right
each of these switches are these are all switches so you have four five six and
seven switch right so you have seven switches so like this when you have
access layers you normally have switches sitting on a rack now the problem is
like I said because there’s so many 24 these are all 24 put switches for 24 in
towards here you have seven of them so or sorry eight of them right one two
three four five six seven eight right so that is 18 to 24 ports that’s 192 ports
so you have 192 ports in this case but the problem is you have to have first
you need to have management IP for each of these devices right so each of these
devices will have a management IP and SPI is created but each of these devices
will have multiple VLAN so you need to have you want to manage according to
wheel and each of those VLANs will have to have a management IP right so these
are all the administrative headaches that you need to have there is a way you
can use something called switch stacking what switch stacking does is it creates
these let’s say these 8 switches they try to combine them and make one logical
switch so you have 8 physical switches but they would act like one logical
switch and one of these switches would be a master right let’s assume this is a
master and administrator as an administrator you only can
to this switch you make changes whatever changes that has applied all these
switches and all these switches will start acting like one device that’s what
it is what’s a switch stacking is switch
stacking is a way where you of course we’re stacking subscribes many stacking
technologies but the one that we’re going to discuss is called a flick stack
so this is a flick stack module at the back of your switch there is a port
where you can insert these modules you and so this map module and these modules
have two links so what you do is you connect multiple devices or in this case
you have two device so let’s say even if you have three and four so what do you
do is you connect these devices in series so you have this to switch to
switch to two switch three switch three to switch four and switch for you put a
loop back to switch 1 so this goes in a ring formation so technically all the
devices are connected to the loop so it becomes a ring right now once you do
this one of the device is becomes a master right and then all the others are
going to be slaves so these are all slaves and as an administrator you
contact the master and you make changes to the master and all the devices are
going to work right so for all practical purpose after this this switch right the
switch a 1 a 2 a 3 and a 4 will start acting like one switch so if let’s say
there is a traffic that’s coming on a 2 and let’s assume a 1 is the monster so
if there is a traffic coming on Ava a 2 and it has to go through a physical link
in a 3 these 3 devices will actually be physical device the a 1 a 2 and a 3 will
be working because the master is the one that controls all the device so if the
master is down the entire or the entire logical switch is down right but if one
of the switch let’s say switch faithfully physically is down a 2 and a
4 and a 1 all these 3 switches will still work as a logical switch right so
that’s what it is so once that happens
this switch now starts acting like one switch right so in in earlier case we
had six switches and you had to manage six different switches and six different
STP processes six different configurations to manage all that were
really really headache that you had to do so this is for you think about what
would happen if you have let’s say a hundred switches to manage to get over
that we do what we discussed the switch stacking so once it’s once which is
stacked they act like one logical accidently a switch and with a little
bit of configuration of what we learned in a last video we can start if you
remember each switch has one connection to d1 so there are four switches and
there are four connections of d1 so you can combine those D ones and make that
into a ether Channel all the connections going to d2 can become any channel and
d1 to d2 already there is a neater channel right so now these are all in
each Channel and technically if you see it is as if there are only three devices
and you would only have one either channel right which will get blocked and
this will the STP will block this one channel and still you have made use of
these devices so what happens in this case is switch stacking gives you
benefit where you only manage one switch and that switch manages the entire
logical switch so as an administrator your overhead has reduced so there is
another technology called chasse aggregation now see the difference
between switch switch stacking and chassis aggregation is one for switch
stacking you need to have a special module like we saw here you have to get
a module like this this is a cisco flick stack module there is flex stack players
and there are many other modules which is not part of you I seen these 192 or
you see CNS so don’t worry about the technical details about those stacking
solutions but just know that for switch stacking you need to have an external
module that needs to be installed on your switch to get that solution but the
other technology is chassis aggregation now for chassis aggregation you
typically would be doing chassis aggregation in a big
this is Cisco’s 6500 switch now these switches are huge switches and each of
these switches let’s say these are called the line cards you have 1 2 3 4
line cards of 24 ports so that’s almost 96 ports here you can add more line
cards if you want right so then you can add more ethernet ports now these are
called the supervisor card right supervisor cards are the brain for this
whole switch this is where all the brain happens so you can see that these
switches this these high end switches already have redundancy so you have two
supervisors so both of them cannot fail at the same time one of them will even
one fails the other can take away and continue the operation of the switch so
these are really really expensive switches are normally used in
distribution layer or the core layer of your network these also have two power
source right so you have this is the power input this is another power input
you can connect this to one line maybe from a different substation right and
you can connect this to another line from a different substation so basically
both of them let’s say power fails in this substation you still have a backup
coming from another substation which will still make sure the switch is still
running so these are really high end switches now again going back to our old
diagram so you see d1 and d2 they’re already any channel normally when you do
either channel you know that you’re connecting to the ethernet ports right
so you’re connecting ethernet ports and you’re doing either channels that’s the
thing with Shas irrigation you really do need any more extra modules you can make
use of your Ethernet ports and create chassis aggregation so basically you
would connect from line card one to line card one and then another line card two
to a line card two and then you can take those things you can combine them
together to form logical distribution layer switch again what happens is you
know that a1 had aligned to a disturbed d1 and d2 so technically a1 had two
interfaces so you could put those you you know do something called as a multi
shot ce2 channel program so you can make use of that technology and create a
channel so a to also has an inter channel a three as an inter channel f4
as an eater channel and you would see that these are now working
point-to-point right there is no loop creation here this is a point point and
that’s making use of all the available links without having any problem so
chassis aggregation is what you do and typically chassis aggregation versus
streets switch stacking chassis aggregation normally is done with higher
end switches compared to an access layer switch which is not a very powerful
device now if you do switch stacking as well so if you do Shazi aggregation for
your distribution layer and if you do switch stacking for your access layer
switch is you do a little bit of configuration you can actually create an
8-channel eat the channel right so you have an 8 port 8 link eat the channel
right it would technically be like a single line so you have a distribution
switch and you have an access switch and there’s one line connecting between the
two it is just that now and STP obviously will work and both of them
would be in forwarding state they’ll be forwarding and this will be forwarding
both of them are happy and our network is actually being used with very high
it’s an 8 link at the channel so that’s a very high capacity bandwidth there so
this is a very short video explaining the differences or are the benefits and
disadvantages of chassis aggregation and switch stacking thank you so much if you
have any questions regarding this video please feel free to contact me write in
to us and we would be able to help you if you have you could also comment on
this video right below and we will try to reach back to you and help you thank
you so much we’ll see you very very soon bye bye

Reynold King

40 Replies to “Free CCNA | Switch Stacking vs Chassis – Day 39 | 200-125 | Cisco Training”

  1. Hello Imran sir,
    I hope you are doing well,

    I am following your youtube channel NetworKing. And in next month I am planning to take CCNA exam. I really appreciate your work. Your uploaded videos are really helping me.

    I have one question. Is it sufficient to do your videos for latest CCNA exam. or should I have to refer other stuff?

    I am waiting for your reply. It would be very helpful for me. Please reply ASAP
    Thank you very much.

  2. Dear Imran,

    Thanks for uploading such a nice video.It helped me a lot to learn about CCNA.
    Can you please upload the video for EIGRP , OSPF and BGP because in most of the Interview people asks on these topic.


  3. I have one question which is : How many video till now are left and how long are will take? because i have to do my EXAM as ASAP , i hope you inform me and answering my questions , Thank you so much u r very good and you help me to improve my self very fast, u r so great thaaaaaaaaaaaaaaank you again and again and again /

  4. I decided to study CCNA three months ago when I checked the first video in this series date and it was Nov 2, 2013, and I was like: well, 2013, I am pretty sure the series is completed by now, But it is not !!!! I got hooked up to the great and smooth way of teaching these videos have that I don't like any other CCNA courses.

    Mr. Rafai,
    I know you are doing it for free and we have no right to push you to upload more videos faster, but, teachers have a message to deliver, and as long as this series is not complete, the message is not delivered, and my CCNA is not passed.

    You are a powerful great teacher, and with great power comes great responsibility

    Thank you for all the good work you put in it.


  5. Dear Mr. Rafai, I hope all is well? I'm looking forward to the continuation of this course, could you please inform us as to the status of this video series? Best regards!

  6. sir, can you give me link to download latest version of cisco packet tracer..please, it will be very helpful..

  7. @NetworKing I am starting a study group for the CCNA this summer and am highly impressed with your videos. I would like to recommend this series to the group, but if we do this series we will need an alternative in case the videos are not done in time. What objectives on the ICND2 exam are not yet covered in these videos?

  8. Thank you very much sir Imran for your video tutorials it really helped me understand the concepts of CCNA which helped me pass my CCNA exam just recently. Your teaching methods are very effective hope you finish the series soon, many people can really benefit from your videos. More power to you sir!

  9. Hi sir! Coming from Philippines.
    I just would like to say thank you for your effort for these tutorials.

    Actually, I am currently attending a workshop here at our country for CCna networking fundamentals.
    Will start reviewing again the lesson i'v e learned so far from the workshop.
    Also, will start reviewing your videos 🙂

    I wonder, if this is the last video for CCnA RS topics?
    Cause' im planning to take the CCna exam maybe around october or november.

    Anyways, Thank you once again for your effort on this.


    Subscribed (Y)

  10. Sir, where are you.I had been a long time since you last uploaded a video.Please sir, please I request you from deep heart please complete this series of ccna.I known i take time to prepare,bt please please give this project some time on daily basis.Please again requesting you from deep heart please complete this series as soon as possible

  11. Sir, Its going to be 3 month since you last uploaded the video..I visited your website to see the progress, there i see that you mentioned that a new video will get added every saturday….sir please please please please plssssssssssss………….upload further videos faster and complete this series as soon as possible

  12. Sir, Loveeee you, Love you, Loveee you, Loveeeeeee you sooooo much imran sir….Sir please upload further videos…Sir pleaseeee….

  13. Sir good but I have question I have implemented campus networking products is Juniper Switchs ……2 core switch clustering and access layer Switchs 2 nos uplink port LACP mode configured benefit is redundancy and bandwidth increase. ……why not protocol using at Cisco switching. …

  14. When this course started, I was about to join in college. Now I have completed 8 semesters of college, bagged a job and going to join it shortly. Maybe, someday this course series ends with a message that "Now you can pass the exam studying from my materials… Guaranteed.!!" And that day, I will be sitting in my armchair with probably all my hairs turned grey and my grandchildren learning from your videos. Eagerly waiting for that day to say a big thank you. Please do complete this series so that my grandchildren can subscribe your channel.

  15. Hey Imran. Your tutorials are amazing. But for ICND2 it covers till 1.6 please post your videos or let me know if you have any monthly subscription available to see full icnd2 course videos.

  16. This video and this series are still valid. If anything changes, we will update this series accordingly. All the best.

    The full series can be found on this playlist:

    #FreeCCNA #CiscoCCNA #ImranRafai

  17. I am trying to learn the master election process in stack switches. Can you share some information in that please?

  18. Your course is very interesting. I'm going for the CCNA next January. By the way, when you talk about Chassis Aggregation you mean using Virtual Switching Systems (VSS), right? I've worked in the past with 6500 switches and VSS. Thank you for sharing your knowledge.

  19. Hi Imran sir,
    I have been watching all your videos of CCNA series till day 40 and i would to say thanks a lot, it helped me a lot learn about Networking and understand the concepts, your way of presentation and way of teaching is very cool and easy.
    However, please take some time from your busy schedule and if possible please please make the practical about stacking.

  20. Mr. Imran Rafai, you have played a great part in my CCNA and in building my networking career, on saying Thank you for nice presentation in your series, I recently passed my CCNA R&S exam, THANK YOU SO MUCH SIR.

  21. I love that you bring out images from real life scenarios. Packet tracer is good but images from real life switches and routers are WAY more helpful.

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