Packet Tracer 6.3.4 - Troubleshoot EtherChannel

hi everyone this video walks through completing packet tracer assignment 6.3.4 troubleshooting ether channel this packet tracer assignment is a part of the route the switching routing and wireless essentials version 7 cisco networking academy curriculum so in this particular lab assignment we are troubleshooting so that means again as i always say in air quotes they have configured some stuff correctly but that means they tried their best but it's a lot of stuff configured incorrectly that we need to go in and fix so you can get you probably guessed it we'll be using a lot of our show commands show run and in this specific instance show ether channel summary as well as show etherchannel port channel to actually dissect what is going on now we have a lot of channel groups and a lot of port channels here we have six of them so we've got uh port channels going from switch one to switch to switch one to switch four and switch one to switch three as well as other ones so we really need to look at our chart here because looking at all those labels can get a little confusing all of them use lacp active or they're supposed to so that makes it a little bit simpler but we don't have to worry about putting them in any other mode like pagp desirable or anything like that or passive they're all inactive but we do need to dive into each one and look at the ports that are assigned to it and kind of just really dissect it port channel by port channel or channel group by channel group remember port channel channel group ether channel those are all interchangeable words so the first thing i'm going to do is actually dive into the first one based off of our chart here which is again port channel or channel group one on switch ones in it's g zero one and g zero two on switch two's in it's also g zero one and g zero two and it should be in lacp active so on switch one here i'm gonna do a show ether channel and if you ever want to look at the other ones you can do a question mark um but i'm gonna just do a summary first to see if we can make any heads or tails of what's going on so for port channel one we see it's down that's what that d is for so it's not really operational the ports are not um added to the port channel right now so let's check the other end enable uh show ether channel summary and again port channel one's doing the same thing now one thing we can learn from this is you notice the protocol is different so that's probably why port channel one is down you can't have two ends of a port channel in different modes so let's go here on porch on switch 3 and actually try to fix that so we're going configuration mode and we're going to do no interface port channel 1. all right you see it change state to down and again i did a no interface port channel one right here so let's go into interface range and we're gonna still do those same two ports which are g zero one through two and we're gonna do channel group one mode and then remember we have to make sure we actually put in the correct mode which should be active okay it says creating port channel one then we'll exit out and we'll do port channel one sorry interface port channel one switch port mode trunk and i'm gonna fast forward just oh and we gotta do no shut sorry because they shut down when we did that so g zero one through two no shut down all right and they're up now and uh switch threes and all right that changed to up uh let's make sure interface g zero one through two interface range g zero one through two no shut just to make sure they're all up and they are so let's fast forward a little bit and see if we can't get these operational now let's do a do show ether [Music] channel summary and voila we see that port channel 1 is now operational is active and is up for lacp so we are good to go we like the ps right here next to each port that means it's operating and in the port channel we want lacp for all of these in this particular lab and su means is up and good all right now let's check port channel 2. let's just keep going down the list here port channel 2 is between g01 and g02 on s2 and s4 so we'll go to s2 and again we'll do enable config t well actually let's do a show ether channel summary first and port channel 2 it notices is up lacp is operational so that is good on that end switch fours in enable show ether channel summary and port channel 2 here lacp is up and operational all right now let's check port channel 3 between s1 and s2 port channel 3 is up and operational port channel 3 up and operational now let's check port channel four port channel four is down here f a twenty three f a zero twenty three uh three and twenty four on switch three and switch 4. uh we also want to make sure too as we go through here that the port number so port channel 3 was 23 and 24 and that is correct now port channel 4 is between fa 0 23 and 24 on switch 3 and switch 4. so do show ether channel summary now port channel 4 shows pagp and it's down okay so i probably need to fix that on this end for sure so let's actually just go ahead and start so i'm going to do a no interface port channel 4 that will remove it out it also puts our ports in shutdown mode so we need to make sure to turn them back on as well so we'll go into interface range fa023 through 24 and we're going to do the channel group 4 is the one we're fixing mode and we're going to put it in active they're all inactive and then no shutdown okay it took my abbreviation there you all you have to do is even type no shu and it will work and then we'll do port channel 4 sorry interface port channel 4 and then switch port mode trunk now let's look at switch 4's end and show ether channel summary and here in switch port 4 we got a lot of problems here it's in lacp mode they've actually got four ports there so we actually need to take those ports out so we'll do go to config mode and do a no port channel 4 sorry no interface port channel 4 okay it changed all state to down so it actually took all four of those ports out now right now we're working on port channel 4 with fa0 23 and 24. so we'll do interface range fa 0 23 through 24 then we're going to do uh channel group 4 mode active and we're going to turn these this these two back on with no shut it's only going to turn on 23 and 24. all right and then port channel 4 make sure we put interface before it and then switch port mode trunk all right so we got those fixed and again if we um now do a do show ether channel summary all right we see port channel 4 is now only in those two ports and it is up all right so let's check port channel 5. port channel 5 here is on our chart and that's using f a 0 21 and 22 from switch 1 to switch 4. so f a0 21 and 22 from switch 1 to switch 4. all right so let me do a show ether channel summary sorry we need to do because we're in configuration mode port channel 5 is down um so that is not good we'll see why it is 21 and 22 so that's okay switch fours end doesn't show anything so we need to go into interface range f8021 through 22 here and do channel group five mode active and then no shutdown okay and then interface port channel five switch port mode trunk i'm gonna fast forward just a little bit with the fast forward button then do a do show ether channel summary and port 5 port channel 5 is now up and operational let's check our other en2 just to be sure but it should reflect the same and it does our last port channel support channel six switch two and switch three f a zero twenty one and twenty two so let's check that switch two and switch three all right before it was up in operation i'll do it one more time okay it's up and operational switch three and it looks like it is down for this one for port channel six because in pagp and what was the other one switched to i may have looked at the wrong port channel here all right port channel six is down for f a zero twenty one and twenty two but i see why this end is in lacp mode on switch two but switch three's in was in pagp so they put mode desirable instead of mode active so what we need to do is do no interface port channel 6 it's going to change them down then interface range this was fa0 21 through 22 here and we need to do channel dash group 6 mode active no shutdown to turn these back on interface port channel 6 switch port mode trunk all right and then we can do a do show ether channel summary and those are up and operational as well so now that we have all the port channels operational we also need to make sure that they are in trunking mode so they'll work properly with sending the amount of traffic and everything across each one so if we go to switch one and do a show run sorry do show run we are looking to make sure the port channels are in trunking mode so they should say switch port mode trunk here and again that's the ale that does not say 11 is l1 so like port channel 3 port channel 5 not port channel 15 so don't get confused there uh they're import they're in trunking mode and then the individual ports are all in trunking mode as well what we're looking for is to make sure none say access mode so let's go to switch two you see here if you do a show run port channel 2 3 and 6 all say access mode so we need to be able to fix that so port channel we said uh two three and six so configuration mode interface port channel two switch port mode trunk interface port channel 6 switch port mode trunk and then what was our last one we said two three and six so now let's do three so i'm gonna change it to three and i'll go up and so i don't have to retype that again switch port mode trunk and you see consistency is being restored because the other ends were not in trunking mode all right and that actually gets us to a hundred percent so that must be all of them that were in access mode still all the ones on switch two's in so that shows you how to fix every issue and this one's a little confusing it's got a lot of redundancy set up to do a lot of ether channels um but again you see stp is blocking as well so we don't create those switching loops because this is again a lot of redundancy um in six support channels and that will fix every issue in this lab and get you to a hundred percent

Channel: Anthony Lucas

Views: 3,244

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Id: c30JR5A0AfU

Length: 14min 51sec (891 seconds)

Published: Fri Feb 26 2021