Layer 2 EtherChannel | Cisco CCNA 200-301

and welcome everyone, oh my gosh, I'm so glad to be here with you in this session today because Monday night is for my watch, oh my gosh, anyway, I'm a little bit out of it because on Monday At night I got the flu. Now it's Sunday and I feel 80% better. I thought, oh, I'm so grateful. I took a shower. I shaved a little. It's great, it's great to have you here. Our goals for this session are pretty simple and that's the

layer

. to any of the channels and you're telling yourself what the

layer

is for each channel, that's what I'd like to start the discussion with you, so let's imagine that we bought a switch like this right here and it has some 24 main ports from home. four external ports or four, you know, adapters, it can support fiber and so on, but let me ask you a question, each one of those ports costs money, so if we bought a switch and then we said yes, we have 24 ports and then they told us that you can only use half of them, where is the problem?

Where is the problem? Management would probably say: How can we pay for 24? We can only use 12. How come we don't get all the performance we would like from our network from our devices? and the reason for this in a layer 2 environment is often due to the spanning tree, let me show you what I mean, let me go ahead and not close this, let's bring up this topology and just edit a little bit here, let me. take out, add another layer to this wonderful screen here and boom and ok, here let's imagine just for simplicity. I'm going to delete some things.

I'm going to go ahead and we'll just delete that port and that port on at least turn them off so we don't throw them away we have this for our discussion and we're all stuck in the peace that the routers will just cross them out for a moment and you know what I'm not either very concerned about this guy, but what I want to focus on are these two links that go between switch 1 and switch 2. Now they read here, which implies in my diagrams that they are trunks, so if we have a user , let's generate the username for the client PC and if I'm saying Keith let's use Bob, that would be great.

I talked to my dad this morning, it's my mom's birthday, she's 88 and yeah, she's just a soldier anyway, so Bob is on this computer here and this computer is on VLAN 10 now. I have a question for you that will depend on a little bit of background knowledge that we've discussed in previous sessions and that is, if Bob's computer is on VLAN 10, why do you make Bob's computer on VLAN 10? Let's take a look. The options are due to the IP address it has, how the switch port is configured, or through some other magical configuration, because the port that Bob's computer is connected to is configured as an access port and not a trunk and is configured to belong to VLAN. 10 and if that's what you're saying, you'd be spot on, so let's go back to our topology, so if Bob wants to communicate with PC 3, which is also on VLAN 10 on this port, let's switch to a previous discussion. that we said here's how it works Bob's traffic will come in to change a switch 1 he'll add a tag if you say if you say oh yeah that's the 802 dot1q tag you'd be right if you're wondering what is an 802 that tag 1 Q watch our video about the trunk link, it explains it in detail and then that traffic is sent over the link, so maybe it's a ping request, so Bob's computer sends a ping on the network destined for this IP address of the previous switch. forwards it down the trunk, it's going to go ahead and forward it with the label that says, "Hey, this is for VLAN 10, including Bob's source MAC address, the destination layer to use the MAC address, all that good stuff, including the label for a 2.1 q switch to get". receives that says ok, this frame belongs to VLAN 10.

Great, remove the tag and then make a forwarding decision if it's a unicast frame destined for PC 3. Switch to say, ok, which port in VLAN 10 you have that MAC address and then change to because you learned it before, you would go ahead and forward it to PC 3 now the challenge is this, if this is our topology here between switch 1, switch 2, spanning tree which we discussed in another session also, spanning tree, yeah, what's the word for it, it doesn't like parallel paths, it doesn't like redundant paths because Italy or two, if we have a redundant path, then we will have loops that can go on forever, a transmission continues forever and therefore spanning tree. in this topology it says: we have parallel paths that will be blocked in one and that is what I meant when I said that we can pay for many switch ports, but in a spanning tree, since the redundant paths that will be blocked are analyzed, like this so let's go to, let's get this going, let's go to our switched interfaces here and turn off these ports, let's switch to zero and two so we can match this topology and then together let's identify which route is being used because one of these links will be used and the another one doesn't, so let's go and take a look at the interface and you have one right here and doot-doot, thanks for that beautiful sound, okay, so on changing one, the first thing I want to do is just turn that off, make sure May we all be on the same page.

I'm just going to close port 2/0 on switch one and two, two on switch and again, the reason for this is that that way we can focus on the ether channel. and why it works and how it works and it has a very simplified topology to make sure that we understand the concepts well, so going back to the interface, I got a confession. I pulled this topology again to remember which port I need to close. 2/0 on switch 1, so let's go ahead and do it together. Here we're going okay, so I'm going to change 1 and choose T. We're also going to show the CDP neighbors just to check the correct port and this says configure from switch 1, own which perspective. that out of your local gig to interface 2/0, switch 3 is there, so that's the port we need to close, so we'll go to the interface of connection 2/0, turn it off and be done, it's also really important.

If we're pretty sure, let's say we go into a production network and shut down an interface or modify an interface, it's always a good idea to run a couple of show commands just like we did just to verify that we're on the right side. device let's configure the correct port. I haven't had any career-changing events messing up the wrong port on the wrong interface, but I have created a lot of work for myself and some network downtime over the 30 years of my job. on you doing the wrong thing, so simply verifying that you are on the right port will help us do the right thing on the right port.

Well, we continue and we are going to change to the port we want to leave. commission like 2/2 we can only mirror this topology so we'll go ahead and do it now as I want to show CDP neighbor to check oh that's beautiful Oh show CDP oh my god I sound like a heart I thought it's okay this is now becoming a troubleshooting lab show CDP shows that CDP is running show CDP neighbors is going to show us this so in my mind I thought show CDP neighbors and then I just show that CDP it's like there are no neighbors what's going on well i just need to add the right command and show CDP so excited that from switch two's perspective it is using its gig 2/2 interface to reach switch 3 that's the that we want to disconnect for this gig 2/2 demo interface, you know, I already did a shutdown and then we'll do a trunk interface show and we'll do it again to get rid of that noise, so here on switch number two we have two ports that are they connect from switch 2 to 2 on switch 1 and those are 1/3 + 3/ 0 gigs and if we look at our diagram just to confirm this, these two interfaces here trunking is enabled on both fantastic and if we go back to switch 1 and we do the same commands, it shows the trunk, we have the gigs 0, 0 and 1. /2 of the switches that are trunks / - switch - we can show the CDP neighbors again to verify it, so that part looks great , now let's take a look at this piece here that says that spanning tree and four are not forwarding for any VLAN in gig zero zero effectively, that means that's where the blocking occurs.

If we make a spanning tree for the image on VLAN 10, to be concise, if we make a program in Spanish for VLAN 10, it will show us for sure that We are blocking right here in the concert zero zero, which means that no we are sending no traffic as effectively. This is our scenario where we've paid for a bunch of ports for redundancy, that's nice, but we're not using them. I mean, what would that be like? have a job like that your job mr. The port is just hanging out, going to block and you know you don't have to forward any frames.

If anything changes we'll let you know bro spanning tree, but in the meantime just to have a good life and if there's a switch. for decades, well that's a long time, but for years that port and that bandwidth that we pay for is not used, so it's a challenge, so the way we can solve it is by tricking the switches and you could say misleading what you mean. Well the problem is that we have multiple links and we can only use one of them, so that's the problem and that's one of the things I want to cover in this video: what is the problem with spanning tree locking and the multiple ports?

How do we solve that? The answer is: we can make that port or those two interfaces so that we have the two interfaces on switch one. These two interfaces on switch two. We could make those two interfaces look like one with a little trick called layer two ether. Channel, that's what the ether channel is. You are taking two or more interfaces that are physical and creating a logical interface to send traffic back and forth, so here is my question. If we did this, let's go back to the screen if we take our diagram and bring. We created another drawing tool that can be temporary in nature and this one will do it for us.

So if we take these two links here instead of making them look like two links, we just make them look like one so they look like one. giant pipe between a switch and a switch to my question for you: is this it? Spanning tree has a problem if it doesn't see any redundant links, that is, if it only thinks there is one interface, a logical interface between the two, how does spanning tree handle that if? see like switch 1 and switch 2 with a single connection between them like this and if the answer you are thinking is that there will be no problem with that, you would be right, so in the Spanish perspective if we have this spanning tree scenario as we discussed in a different nugget our different video excuse my story my mental imprint there as we discussed in a fairly previous video the spanning tree is at layer 2 it's going to choose one of these devices as root, that's right the ports are forwarded from the root, which would be a designated port and then the switch would choose a root port and from the switch's perspective that support has the least cost to them in what appears to be a link to the spanning tree, so the spanning tree expansion no longer has to do so. blocking and then as far as load balancing and load sharing of traffic between switch 1, switch 2 over the ether channel, there are several options for how that decision will be made based on the port information, the of the IP address and MAC addresses they have. involved etc. but the key here is the conclusion is that the solution to spanning tree blocking when there are multiple connections between two switches is to use ether channel and this ether channel makes those multiple interfaces that are connected to each other seem like one. logical interface and then Spanish, she says great, no problem, there is no parallel path here and then the ether channel can take what comes in a frame, it can load balanced between the different links and depending on the method, is set to do so by default. default method when you set it by default it does load balancing there's nothing you need to do unless you want to modify and tune it and we talked more about that in the CC P level training so I wanted to cover three things in this video Number one was the problem with multiple links, the answer is that multiple links between two switches spanning the tree will lock on all of them except one, so the single one can be used effectively for a given candle.

Secondly, the solution is usually to use a technique called ether channel and with it you have a text message from my dad, my 90 year old father, okay, hey, welcome, so Bob, of all my videos, is on the house, so it's good to have you. I asked him to move on because I focus a lot on the content by looking at the message board. I asked mydad to go ahead and just text me when he came in so welcome dad it's great to have you so the second thing the ether channel does makes those multiple links look like one. and that was my second goal and then the third is to explain to you how to do it and how I did it successfully in my operation in my life.

I have had the opportunity to do training at the CCA level for many years and so on. we would write really twisted scenarios to make the ether channel not work, which means it's really hard to come up with, so I want to share with you some analogies on how to make this work and let me show you, let's talk about hmm, let's do this, let's imagine that I had a self-driving car, so in this scenario we have two switches with two interfaces and we need to go ahead and configure the two interfaces on both switches to become one ether channel like many port channels, one logical ether channel connection. ether between the two, what happens a lot of times is that people forget that it's a team effort, so if we had a self-driving car and let's imagine we had four people and we needed to get into the car from Bob's house it would be Bob and Louis and from Keith's house would be Keith and Deena, so we have four people that need to get in this car and here's the problem if the car is moving, let's say it's moving at three to five miles per hour, which can be pretty slow, but it's moving and we're all trying to get in, so I'll put Bob and Louis in the front, on the driver's side, on the passenger side, Dean and I would go in the back and the back seat on the left and right, so we have to walk up to the car while it's moving, open the doors, try to get in.

I think, well, what do you think, how successful would that be with a 90-year-old gentleman who is very fit but is 9 years old? old man my mom who is 88 years old my wife who is closer to my age and I who was born in 1964 am 55 years old what do you think it would be like if we tried to get everyone in the car while the car was moving? Yes, it's not good. it's not a good scenario, someone is going to get hurt, it's not going to work properly and that's the problem, the reason I tell you those stories because it's like setting up an ether channel when people set up their channel with multiple links on both sides and you are going to be part of this new group of logical ether channels, you need this, you need to stop the car before you start configuring it because if you start configuring while the interfaces are active or the configuration is different on both sides or a little bit off, there are there's a good chance that the ether channel won't be established because they're out of sync or because one guy starts too early and thinks the other is dead, etc., so one of the big secrets to CCI leveling is when you're setting up, eat your channel. turn them off, turn off the interfaces, do all the configurations, make sure the interface configurations are the same, like if you have trunking on one port, make sure trunking is configured on the other part or if they are, He knows what the others are. yes, make sure they can establish a unique identity identically first on both ports on both interfaces, you can use turn it off, make sure they are configured the same, enable to eat your channel on both ports.

I usually use the range command to get both at once or if there are more interfaces for one, whatever it is and then leave it turned off and then go to the other side, close them, make sure the trunk is configured the way you want and then go ahead and configure the ether channel the way you want. it goes out and then when both are correct, then and only then you go to one switch and not close all the interfaces and just to jump you do an OSHA on the other one and there is a good chance that will happen.

To achieve success, anything else is risky and often leads to pain and suffering, so it is very good advice whenever an ether channel is set up, close it, enter the settings, check the settings and then move them in the same order or show them, you know? at the same time, here is another key aspect that I like to share with you about the ether channel and that is let me clear my screen, the key, the concept that I want to share with you about the ether channel is that when you connect an address, which here? and switch to here and you have your two ports right now that are physically connected to each other when we are configuring the ether channel there are some options that we can use regarding the configuration of that ether channel, one of those options is called and It's pretty simple, what that means is to make a third channel, do it, so we configure that as we configure the interfaces to enter this group of ether channels and that is one option, although there is another option which is to use a protocol that will help.

We manage and monitor the ether channel and one of the previous ones was called port aggregation protocol written like this and that is a Cisco thing and Cisco does a great job. I mean, they've created a lot of great technology from the beginning and then later, you know, parts of that were adopted and ratified and made into standards, so Page P was the way that Cisco originally had a protocol that could manage and observe our ether channel and help us maintain it, so if we wanted to configure it. these links as we configure it to use the port aggregation protocol, we have two options: it will ask us for a mode when we configure the ether channel on each switch and if we say desirable or if we say Auto, both in English mean that Now we are using the port aggregation protocol.

I also want to point out what desirable and Auto mean. I remember it will be strong, well, yes, when I was in high school. Now let's go back maybe 60 or 70 years to a barn. dance, so imagine a dance in a barn with all the girls lined up for a high school or whatever, all the girls lined up on one side of the barn and all the boys lined up on the other side of the barn now for the dance to happen between children. and girls or who could really there has to be someone who starts it and says would you like to dance and then someone who says yes, I'll dance, do you agree?

I mean, there has to be an initiator of the dance, so if both parties just stood by their wall, the guys and girls just stood there and no one invited the other person to dance. They will have a full night leaning against the wall and listening to music without dancing, so one of the options on the stage. upload ether channel is the concept of Auto with port aggregation protocol and what Auto means is that if someone invites me to dance the switch says that it is configured with Auto for the ether Channel if someone invites me to dance I will dance I am willing but No I'm going to go out and start the dance, so what happens is if you have this switch set to auto shift one and you have switch two set to auto shift, even though it should work, it's not like the boys and girls. standing on either side, both waiting for the other to ask them to dance, so the other option for the port aggregation protocol if we want to use it to manage our ether channel is the desirable and desirable option simply says: go to ask, ask the other side to dance and if you have at least one side, the boys or girls configure it as desired, that starts the invitation for the ether channel and they start it up and negotiate and configure it so that one person can configure it. both sides are desirable and if full size is divinely desirable, I mean either side could start the conversation and the other side if desirable will also say yes.

I was going to ask myself: I'm desirable, so the key is port aggregation. protocol at least one side must be set to desirable that's it and the other side can be automatic or desirable but you must have at least one desirable side to start the process. Well, that's the port aggregation protocol. The other option is link aggregation control. protocol l.a innocence all uppercase link aggregation control protocol, this is the standard and if you configure when we configure the switch to tell their respective individual ports, they will be part of this logical port channel, this group of ether channels also a times these Anyway, they are called delay link aggregation, so when we tell these interfaces that they will become part of this port channel, this channel group, if we want to use Lac P, we have one of the two modes that we can select in the world of Lac P and The link aggregation control protocol has the options of active or the passive option and these options for the link aggregation control protocol work the same as they do with the port aggregation and that is if we have the same line of boys and girls on the respective sides or humans. on both sides either way and we are using the link aggregation control protocol, as long as one of those two sides is activated, that will initiate the invitation to go dance and play the link aggregation control protocol game with the other side and on the other.

The side is active or passive, it is willing to accept the invitation and leave, so you can configure both sides as active and the bottom line is that there are three ways, three main categories, in which we can configure the ether channel for the layer two, one is in doing it. in no link aggregation control protocol there is no port aggregation control protocol if we want to use one of the other two we use the desirable or Auto mode which gives us the port aggregation control protocol and if we use active or passive that represents that we are using link aggregation control protocol and here is one more warning: it will not work if we use port aggregation protocol on switch 1 and link aggregation control protocol on switch 2, they are not compatible between Yeah, so we have to choose, okay? going forward either we continue with a link aggregation control protocol on both or we go with the p port aggregation protocol P on both, well, now that I have shared it with you, we have covered two basic things, number one, which we have identified. the spanning tree challenge and blocking when you see multiple paths between two switches and to solve that we're going to use a logical port channel, sort of logical ether channels to make that link look like or make those two links look like one and so Now what I would like to do is walk you through deploying that to a production environment and also checking it out before and after, so let's open up the lab environment here and let me reset it.

I need to log in to my administration computer. which I'll do right now, okay, super dumb, okay, from the switch perspective and let me also confirm our interfaces here, we're going to add, we're going to add port 1/2 and 0 0 and 1/2, which as part of a group of ether channels and we're going to use the link aggregation control protocol to do that, so I'm going to use active mode on switch 1 and I'm going to do the same treatment here on switch 2, so here on switch 1 remember remembering the ports involved here, let's take a look and configure this together, so here's the spanning tree, so spending 3 gigs 0 0 is the one currently blocking the gigs 0/1 is a connection to Bob's computer and the 1/2 gigs is the connection between switch 1 and switch a, we were able to verify that with a show CD PDA, my goodness, wash my hands, I can't do anything with them, show the CDP neighbors and that only confirms where those connections go so 0 0 and 1/2 are the two ports that we're going to put on the ether channel that connect from switch 2 to that connect from switch 1 to the switch so to do that we'll go to configuration mode interface range and then we want to put in both interfaces so we have gig 0 0.

I'm looking at my notes here and interface gig 1/2 and making sure I have my ports right so We are now in interface configuration mode and I have a question for you. What should we do before we start setting up the ether channel at a minimum? What should we do? I mentioned it before and this is what it is like that car that with 4 people trying to get into a moving car there will surely be a danger. and we want to eliminate that danger, so we want to schedule downtime go through change control in a production environment make sure everything is planned and documented and then we bring these interfaces down together we implement all the commands we go to the second switch we bring those interfaces down and we put them in all the commands and then once we have committed with the commands, we would want to open both sets of interfaces almost at the same time, so that's what we will do, here on the switch a shutdown will be performed. that depresses us and also because these were already configured as trunks and we have verified it together, but I'm about to go on, you really wouldn't have to do it, but it would be good to verify that both portsare configured.

As especially in a new environment, make sure they are both configured the same. Both ports must be switched. Port trunk encapsulation uses dot1q. Both ports must be switched. Place the remote trunk and if you are not sure, you can check the running configuration. each of the interfaces or we could just put those commands and against which port trunk encapsulation dot1q boom switch port trunk mode and what does that do just ensure that those commands apply equally to both interfaces, because this lab was already up and running and there was and we are a verified trunk, no big deal, but to avoid errors or missteps, it's not a bad idea to confirm that the configuration is the same and now we will add both interfaces to an ether channel, so the syntax for that's the channel group space and then we can choose a number, so this is just a locally significant number on this switch, so just use the channel group space question mark and then the mode space and then depending on what we want to do, the options again are three basic options that we can activate: we can set it to an option that implies the P packet port aggregation control protocol or we can supply a mode that implies that we are using the protocol link access control, so let's go ahead and use this enable active. link aggregation control protocol unconditionally and that means this side will start a conversation for link aggregation control protocol with the other side so go ahead and activate it and that's it now before they show up let's configure the other side because if we bring them up right now it's not going to be happy with the other side because the other side is not yet configured for the ether channel and then the negotiation is going to fail so we go down to the other side which is switch two and let's go to 1/ 3 and 3/0 we do basically the same configuration on them and here we can also specify active or passive because they both involve a link aggregation control protocol and either of the two would work only for the lab we are going to move forward . and just turn it on on this side as well, so up, switch, let's go and here, switch to interface range, also let me check that the ports are working, so I turn off the other port, so CDP may be expired artists.

It shows CDP neighbors, yes, so CDP is valid for 6 times 180 seconds and then times out, but we checked it before with our trunks that we were connected to, so we are ready to use the interface range. Ragan and we want to go to the 1/3 concert and also the 3/0 concert and checking my notes here let me look at the topology one more time 1/3 + 3/0. Also, they didn't sell me like the first one, probably by a few. Years of my experience at Cisco in the late 90s and early 2000s, I wasn't convinced about using the range command and I could just go to each interface and run the commands, but in doing this I used a range command and made sure If you're on the right interfaces, you'll avoid typos, so a typo here or something like that won't happen because all the interface involved will get exactly the same commands at exactly the same time, so it's a good idea just to reduce the writing and also error reduction, so we'll go into interface configuration mode and do a shutdown which will simply change the dot1q trunk port encapsulation now if it was already configured and we were sure if we wouldn't need to do that again, no there's nothing wrong with doing that and then let's do a drunk port change mode, okay, so we know those four were already configured, but it's good practice to make sure they're solid and then the channel group.

What else is there after a channel? Let's take a look. Oh, okay, channel group and then we'll do a. We could use any local number that we want to listen to, it could also be one and then we will moderate and depending on our plan we will use link aggregation. control protocol and therefore our options are active or passive and you will wonder why they didn't put them in order with the link access control protocol first together and then last, the important gradation protocol and the answer is alphabetical. active automatic desirable in passive is alphabetical so they are in that order so we'll set this to active as well and then now that we're sure we've got both sides right, we'll get a switch 1 and do a no off which is short for not off, of course, and we'll change to not off fantastic and then we'll go ahead and exit configuration mode, let's take a look at this just for a moment, what I'm hoping for is to have a log message saying that we have a new interface that just appeared and that would be our port channel 1.

There it is, so this ether channel is configured with the command channel group. The new logical interface is a port. channel, so there is a port, channel 1 says it is active and as far as checking and looking at that interface, we have a couple of options, you could make a display interface, oh that will have a lot of output, oh yeah, that's a lots of output, let's do it. this, let's make a show in your face and then let's pipe it so that the pipe reduces the output that we have to look at and look for anything that has the word port in it, oh, maybe it's the word that I thought would include port. that's not what I want okay let's make the port in uppercase so if you know what you're looking for it might be a little easier here we go so let's show the interfaces pipeline include PRT in uppercase and there we have port channels, the line protocol is active. connected, that's a very, very good sign, we could also show a summary of the IP interface, which would also be one way to look at it, so there's our layer two port channel, there's no IP address assignment because it's the layer two interface, what else could we do?

How about this? We could show any Ethernet channel. Something else to make this question mark here. Show the Ethernet channel. There are many options here. Let's do a summary of the Ethernet channel. That's great, so these commands display the Ethernet channel summary and show us what we currently have. place, then we have this group one, which is actually our port channel, our first group and we have port channel one. Your question if we look at the decoder up here, it means there's layer two right there and you mean it's currently in use and the protocol. is the link aggregation control protocol and then displays the two ports that form or join that ether channel group for this new logical interface called port channel one.

Let's see what else we can see with this. Oh, we could do this too. make a program get your front port channel oh there we go let's make port channel one and label the keywords change port and I definitely needed it so change port just take a little layer two features for this new logic layer make interface and there's the The command right there shows the interface port channel 1 switch port and that shows that it's currently a trunk and then the details now, how did you know it was going to be a trunk? We never told the port channel itself that it was going to be a trunk.

What happened was the interfaces when they came into that port channel we are configured as trunks and as a result that is why the port channel itself is a trunk. It's not magic, it just carries over the properties of those two interfaces that had the same configuration to the binding mechanism and turning on the binding and just takes this to the ports itself, let's see what else for me, oh you know, another thing, let's get back to the whole purpose here, I didn't write, we have a tree ban promise. Because spanning tree had those two links between switch 1 and 2 and it was getting stuck online, we're not going to go into depth to be able to use it, so now with port channel and we put those two ports on both switches in a spanning tree of logical channels. it shouldn't be blocking at all in our topology, let's take a look, so we'll be here on switch one.

I'll make spanning tree or VLAN 1, not line 10 and we'll look at this, so gig 0/1. Let's say the very fast topology 0/1 is this port right here that goes to Bob the client and port channel 1 is the set of those two interfaces that are connecting or switching to, so if we show a CDP neighbor, show us here, look at that, so it literally shows us what interfaces you know to activate, but from a spanning tree perspective, you only have one logical port channel, so you're not doing any blocking here, so the switches don't they block switch 2 is the root. so port 1 is blocking here is the switch to spanning tree VLAN 10 and it is also forwarding so gig 1/0 is an access port and port channel 1 is the interface connecting switch 1 and switch 2.

I'm very happy it worked. well, I have seen many times when the ether channel just didn't work well and it all comes down to the situation where the 2 or 4 multiple interfaces that we are going to put on a port channel had their configuration It's the same thing, I mean, what if you had a port that was an access port, a port that was a trunk port, and then tried to combine them both as part of an ether channel? It will bark at you, so the secret to getting this to work is to close the port range on both sides, make sure the settings are correct on both sides, double check your work and then configure both settings at the same time and you will have a great success with the link aggregation control protocol. or port aggregation control protocol because when they both appear and both happen, they both see each other and have the same protocol in the same configuration, it's a win-win situation, well, that's what I wanted to cover.

Today again I feel very happy to be able to talk and not cough. It's been fantastic, so I have some other ideas on other topics that I'm going to include. I haven't fully solidified which one I will choose. I'm going to include the next one but I will announce that on social media I also have a new playlist oh my goodness if you haven't subscribed yet by the way take the time now and click subscribe click the bell alert to see alerts when new videos arrive. above, but here's the URL I created that you can use and it's a playlist for CCNA with all my newer stuff, mainly live streams.

I'm also going to save other pockets that I create that are needed for that and the URL is ogi T dot online slash sloth, thank you mister sloth, that's all and I thought I'll make this really easy to find for anyone who wants it, so I will add the new live streams that are applicable for CCNA on the right side. To access that playlist, also put the link that in this video, once it's posted here, about 45, watch my watch in about 45 minutes. Lindsay is going live so thank you so much for joining me in this discussion about the layer 2 ether channel and how you can help and I hope to see you my friends in another video very soon so be sure to subscribe again and have a really nice day great, thank you all, even if my father is down, I will still look for my skin, you can say oh. that's not mine I'll keep holding my head up even the sky is falling jumping so high always rely on fighting sometimes to collapse but we get up on things from the ground you can say oh that's not mine I'll keep holding my head up