Configure Inter-VLAN Routing on Cisco Routers and Switches
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- เผยแพร่เมื่อ 15 มิ.ย. 2024
- New Cisco CCNA 200-301 Playlist here: ogit.online/sloth
In that playlist learn about Inter-VLAN routing with an external router, or on a multi-layer switch using switched virtual interfaces (SVIs).
New 2020 content is now available for this on the TH-cam playlist for Cisco CCNA 200-301: ogit.online/sloth
Cheers!
tried it also with 3 2960 and 2 1841. middle switch has to have vlan 23 created. Make sense, after all . or set nativ vlan to 23 ??.
I've been in the dark with VLans and Trunks in regards to Switches for so long but you just turned on the light thanks you got a new subscriber
Keith I have been a cisco network admin for about 10 years an just this video an i have to say you really know how to explain things. Your explanation is perfect. I often look at videos just so that I know that I am still doing things correctly and if there anyone has any new ways of doing things. I recommend this video to anyone pursuing there CCNA or just as a quick review for people who are a little rusty. Thanks,
JT
Just stumbled upon your videos and gotta say that these video's just make TOO MUCH SENSE. Thank you for explaining all these topics in a more down-to-earth tone.
I worked on it some more last night by creating a brand new lab that was a complete replica. The network was not happy with having 2 active trunks on both sides of the middle switch. So, instead of rebooting everything again, I simply shut down one trunk port on each side of the middle switch and voila! I am still learning so I want to ensure that this would truly cause an issue using real hardware. Thank you so much for your response.
I came here to watch a video on VLANs. Next thing you know I am backing up and re-watching your magic trick.
Great videos Keith you are an enormous help!
Hi, Keith!
I´m from Angola and I just want to thank you and Jeremy. I´m preparing for my CCNA and your videos are helping me too much. Again thank you and all cbtnuggets team... love you guys!!!
I am a CCNA student, nice video series and wishers for make informative video,
Cheers,
madusanka
srilanka
wow..no words u r one of the awesome trainer on the planet...
Yes...Yes we do. If the ether-channel isn't configured, the default spanning tree (on by default) will block on one of the paths to prevent a loop.
Great eye!
Best wishes,
Keith
@KeithBarker I tried same configuration in my Cisco packet tracer and gns3 i didn't get the routing access between R1 to R2 unable to access. if i config trunk between sw1 to sw2 to sw3. if i config access sw1 to sw2 to sw3 i can able to access. where i made mistake
Mr. Keith Baker
You are a SUPER-DUPER TEACHER.
Thanks for doing such a great Help for us.
Morning Keith, thank you for taking the time to teach someone like me. It is much appreciated.
Great break down and very easy to understand.
I really a appreciate your time sharing your knowledge with the rest of the world... God Bless you and your family.
I don't know that I have any detailed videos on that. With 802.1q trunking, it simply means that when any user traffic, that happens to be from the VLAN matching the native VLAN, just don't tag it. The receiving side (who agrees what default VLAN to use) will assume that any user traffic that doesn't have a tag, is from the same native VLAN. That is pretty much it in a nutshell.
Keith
Great teaching technique. Explanation is perfect
Hi Richard-
For demos, I usually don't implement fault tolerance, but in a production network we would for the critical single points of failure. It is often a trade off between risk, downtime and cost.
I don't have a organized list of topics (unfortunately). For the commercial CBT Nuggets videos I create, those are organized by topics (Firewall, CCNA Security, GNS3, IPv6, etc), but the free ones on TH-cam are simply all listed on my TH-cam channel.
Thanks for your question,
Keith
Hi Keith, I'm just loving your videos, they are so well explained in such an easy-to-understand language. Text books dind't help me understnad many concepts, but your vids make things crystal clear.
many thx
Great videos, I have been asked to pick up some basic VLAN configuration by the networking team as they are over-worked, these videos are a lot of help.
thank you!
I actually remembered my fatal mistake when adding vlan through trunk and forgetting to type "add". Yeah... I had to travel to the other end of the city :)
Thanks for the vid :) Your contribution is really huge!
If its possible in future releases, I'd love to see some discussion about designing the L2 (optimizing MTU or maybe using other L2 technology ) for the least overhead or explaining overhead in more detail I'd say. Its strange that such a crucial aspect is usually ignored.
Keith Barker, thanks for all of your toturials.
I really appreciate this video lecture. Thanks for this great job well documented and delivered
Hi this is very interesting ,I dont speak english very much but I can understanding your explication congratoulations
Nice video. Im studying for CCNA by myself and your videos are helping a lot. Keep them coming =)
Excellent and thorough video... Thanks Keith... Its all clear now.
Thanks Keith for a quick reply...I was able to check the Video Router on a stick but not MLS...Thanks for the URL of the respective video.
Great Video and easy to understand, keep up the great work!
now in 2020 is it still a very helpfully video thank you for making the time for helping us i hade a problem with transit vlans and now i know what it is thank you again :)
Awesome! Thank you Kenneth.
gr8 vid ... a very step by step porcess
Some switches will automatically negotiate a trunk (ISL or dot1q, if supported), but it is best practice to administratively configure each trunk port (where you want the port to be a trunk) and manually set the encapsulation type and that it is a trunk port and not an access port).
Wow, a lot of videos.
I will go through them, `cos you are going straight to the point. :)
I have failed my CCNA because I have forgot to do something in the sim section for... 50 points over 1000. It is basically I think one good command or 1 question.
Now it is time to go for it again.
No mess, no fuss, just pure knowledge. :)
Thanks for videos!
BTW. You are not talking and writting that stuff simultaneously, right? Or are you multitasking?
Excellent information. Thank you.
This video is awesome, very simply explanation of the subjects. I've subscribed to your channel and will catch up with the other ones eventually. Keep up the good work!
Regards,
Elias
Great work!
Thank you. Very informative video
If there are 2 or more routers, they will need to be configured to cooperate, with either a dynamic routing protocol to share the routing information with each other, or static routes.
Do you have a specific need that you are trying to solve, or just want to practice routing?
Thank you for clarifying my doubt...i will go through that video...
Hi Keith tank you very much ....am now a fan of u....:)
Very nice video. Thank you.
Absolutely *fantastic* explanations and lesson in so many different topics. My question is, why the dual trunk lines between switches? For redundancy or aggregation purposes? Thanks Keith.
Without any configuration details, we could guess as to why it is flapping. If everything is correct, it could be that packet tracer isn't doing the simulation correctly. You may want to try it with a different routing protocol, to see if you get better results with packet tracker.
I love your video and you are a good teacher. It is a bit annoyed when you are showing switches and you are typing as the same time. I am new in the field and would like to follow all that you are doing.
Thanks.
thanks. very informative. even im drunk viewing this, i still managed to nail what you were saying. FTW~
thanks for your prompt reply..........
Thanks. I just went thru and set them all and they now show the proper revision number from the server. I was wondering why they didnt get the vlan info when I added one on the server. I found that all switched had reverted to server. Thanks for taking time on my question Keith.
Thanks Keith...This Video helps understand the concept very clearly.
May I know when can we expect the video with switches involved instead of routers?
Hey Keith...I found it a lot smoothed in this video then your video Router on a Stick. I think there is a puzzled that I couldn't find it, I even add statement Switchport nonegotiate and still no luck. But on this video, I tried first with packet tracer to make sure is working then applied it in my own Cisco racks. Nevertheless, I will continue to watch your video as I recommend other too. Thanks Keith...:)
Hello Veeresh-
The network statement tells the local router, which local interfaces should be part of the routing process. Each router is only responsible for adding its own networks. I have another video called "So that is how the network statement works". If you do a search on that, it can help clarify it for you as well.
Hope that helps,
Keith Barker
I liked your video very much, it was very understandable.@
this is very interesting video
configure inter Vlan routing great video
Great video, how do I design the same topology using packet tracer or is it any software that is better? and how do you redefined your ports? thank you.
Gr8 video!..Thnx :)
Thank you Keith. I got 1 question for you, after reading a topic about ISL, dot1q and Routers.
In this example you didn't create any subInterfaces on the routers to allow different vlans from communicating to each other. That's because EACH of the Router's Interfaces are connected to only 1 vlan?
If there was only one connection between R4 and SW2, for example, then i would need to create subInterfaces?
thanks for your time!
Hi Keith, Thanks for the video. I have a question. Ping packet from 10.0.0.10/24 has not VLAN Tag until it reaches SW2 Fa1/2 where it is tagged with VLAN 2 & sent out of Fa1/5. When it reaches R4 Fa0/1, tag is stripped off? Then it is forwarded thru R4 Fa0/0 as untagged, reaches SW2 Fa1/4, is tagged with VLAN 23 and sent out of Fa1/11 or Fa1/12 Trunk ports? Is it the above way, the ping packet is routed by R4 as the Fa0/0 and Fa0/1 ports of R4 are not added to any VLAN.
Keith, Networking is like riding a bike for you (it seems).
You mention a fair bit in your video's that you have different video's that go into depth about other subjects, if possible at all could you add those links into the video? (Like comments)
I did a similar setup as you have except with one router. it's working but I will not be needing to setup eigrp. Do you always (try) to use redundancy between switches and routers?
I set is all up again, its doing the same thing, I can see that it has to do with when I configure the last set of parallel ports on the switch, suddenly when I issue the switchport mode trunk command, STP puts all the ports into FWD. I'm still trying to play with it, but by now its getting me pretty frazzled.
I rebooted all the network devices again, even workstations and servers and it seemed to have fixed the problem.
@Keith6783
Thanks Keith. I did a "show int trunk" command on all 3 switches. And Vlan 10 wasnt on switch 3. Love trouble shooting.
Great vedio, do you have any vedio explaining the depth of native vlan? if yes would you please direct me there...becasue you just used the vlan1 as a native which is by default.
thanks
so i can just put the router in front of the first one and it would automatically route the ip requests through? i try to find materials online but they all point towards routing vlans.
Hi Sir, thank you great this video help me to understand the logical way.. of network
you have mentioned switchport trunk encapsulation dot1 not support for some ISO
what does mean ? not working this command or 802.1Q will not support on those ISO
how trunk will work ? by default ISO will take Auto by using this command
switchport mode trunk( Automatically 802.1Q will apply?)
Hello Keith, I want to ask that in which case we need only one router for inter-VLAN routing and when we need two routers?
If we have two subnets or VLANS on the same switch and we want their communication so we need two or one router? I am confused as i studied that every network has its own gateway which is a router.
Keith, I set this up in packet tracer, exactly as I seen you set it up, why is my EIGRP adjacency flapping? Its only flapping on the right router.
Good one
I am using a Cisco Router RV260W. I am not wanting to move away from it as I have a Web Server at 192.168.123.104 and port forwarding is happening for it. Like 8080, 8083 forwarded to 192.168.123.254. I tried to setup VLANS within the cisco router and in the VLANS set 192.168.123.254 as one of the DNS addresses. An example when I tried to use 192.168.200.102 as an address within the 200 VLAN I didn't get any internet. So What I want to do is set the VLANS in an Ubiquiti switch say a 16 port version and assign 3 ports to each VLAN and go from there. I want a VLAN for IoT, one for my main activity, One for the Webserver at 192.168.123..104 and one for Guest Wifi. Also I have a Ubiquiti UAP access that I can only get 6 mbps download speed out of it. My service is 50 mbps. Any ideas help appreciated
I have a router 2811 with 16 fastethernet ports. how do we cofigure the this router ?? i mean if the devices are connecting directly to the router how / to what we will configure the default gateway ???
Hi Mr. Barker. Which microphone you use for recording? The sound quality is great.
For that video, I think it was a mic from shure. That was a couple of years ago, and now I use a one from Plantronics. I think it is a model 628 and is fairly inexpensive.
why do you need 2 trunk ports between each of the switches?
I remembered that after I messaged you.
thanks
Hi Keith congrats for the videos I have a question what program do u use to simulate networks on mac???????
Hello Carlos-
GNS3 is an IOS emulation program that works on Windows, Linux and Mac OSX.
It is GNS3 that I used for this demonstration.
Keith
Hey Keith
Thank you very much for your videos. A lot of them opened my network-eye and gave me an aha experience. But at this video above... it would also work if you configure it without trunk ports, wouldn't it? Configuring all vlan 23 ports as access ports would also let the PC ping the server because the routers are "translating" between the different vlans. Maybe im wrong :-[
Do trunk ports carry data like from the internet? Or do you have to run another cable? Kinda confused :/ Could someone explain?
i have 6vlan in a switch i want to communicate every vlan with vlan 6 or any vlan con"t communicate each other how it is configure please help
I just wanna route two LANs. Can I get an off the shelf router? Someone told me that I have to worry about state full firewalls and whatnot. I don't ndee
Hi Keith,
while configuring EIGRP protocol you added only two networks in R4(network 10.0.0.0,network 23.0.0.0.)here i have an confusion why you not added network 30.0.0.0 in R4.similarly network 10.0.0.0 is not added in R5..plz may i know the reason...
I have an unrelated question. In Packet Tracer when I do a Power Cycle Devices.. all of my switches go to VTP servers. I save the configs as clients. And also hit save before I do it. I am confused. It takes too long to go back and reconfigure 15 switches every time I open the file. Do you have any ideas?
@Keith6783 Oh Great! Thank you very much for the help. The Official Exam Book from Cisco press - CCNA ICND2 2ed by Wendell Odom - has a small explanation about that but it isn't so clear and extensive. Thank you once again!!!
I am using a windows machine with Packet tracer. I setup the exact configuration that you showed and everything is "green." I have encountered an issue with being able to ping from the workstation to the server. After some troubleshooting, I have encountered an issue with SW3. When I do a "show interface trunk," it shows 1, 3, 23 as being vlans on fa 0/13 and 0/14. When I look at SW1, 1, 2, 3, and 23 show up. So...I am lost. I have written all configurations and reloaded all network devices.
Follow up question. I don't see any VTP info in the startup-config or running config! Where is that stored?
Thank you Sir for this video..i am new in networking and i want to know more about networking.but im using windows not mac..
1 question when I try to enter the switchport trunk encapsulation dot1q it gives me a error can you please advise on what I may e doing wrong
in the picture you have two cross-over cables per switch is this needed or is it just for the diagram?
khaza mcgann Network Redundancy
Can you have interVlan communications with a router in your topology?
which simulator can be downloaded free from net on which I can practice routing as well as switching both? please help me out....
i like it
Did you mean IOS? If so, that is the operating system on Cisco routers and switches (many of them). Some IOS versions may not support some features on some hardware. You can verify what features exist on which IOS and hardware by using the feature navigator. wwwDOTciscoDOTcom/go/fn
@Keith6783
I guess that I meant to ask "Can you have inter Vlan communication without a router of a layer 3 switch?" Because I configured a switch and pc network and I cant get anything to communicate outside their vlans" Is that correct?
do you use GNS with sdm ?
how to run the Easy VPN?
Thxs Sir i got some information with link i understand
802.1Q not supporting to below mentioned Platform
Catalyst 3000 No only ISL- DTL
Catalyst 1900/2800 No only ISL- DTL
Sir, My question is to configure the trunk port essential commands?
Switchport trunk enacapsulation dot1q- (This is essential or not?)
Switchport mode trunk---- (with this command dot1q will apply automatically?)
How do we configure vlans on 16 port Router, without switch. Please help with this....
thx in advance.
Im in final year of my 2 year program of Computer Networking Technician and Im worried about getting a job. I would like to know how is market for this career?
hi keith, i download GNS3 and install this on my PC. in this video i found that u configure SW but i cann't do so. Why? plz give me a solution.
hey keith
thanks for this informative video..could u please upload a video for pat translation with multiple vlans on local network.thanks in advance.
Michel Lapointe
il y a 1 heure (modifié)
Hi Keith: when attempting to duplicate on Packet Tracer, I noticed that to get trafic between routers , I have to create vlan 23 on Sw1, and I don,t see you anywhere creating it. Make sense ? - tremendously enjoying what you do. Thanks. Michel
Thank you for the question Michel. At around the 7 minute mark th-cam.com/video/jg0IECQmUjE/w-d-xo.html I mention that when assigning an access port to a VLAN, if that VLAN didn't exist before, the switch would automatically create it. If the switches are running VTP, the VLANs would be replicated. In Packet Tracer perhaps the automatic VLAN creation doesn't happen or VTP isn't set up. In that case you would want to create the VLANs. Hope that helps. Check out my CCNA 200-301 playlist here: ogit.online/sloth
Thanks again.
@@KeithBarker Merci beaucoup for the quick answer. indeed, that is certainly what is happening and I remember hearing the comment and not paying too much attention to it. well, I definitely should have !!! that would make for a great trick CCNA question !! I'll try it tonight on my mini lab. BUT ... your answer begs for another question: what is the trend toward VTP ? to use, or not to use ? that is the question. Also, I have been playing with Juniper switches for a while at work and I don't remember seeing anything like the Cisco switches VTP. Merci encore, Keith,.
I'm still troubleshooting. I think I followed this video ok. But, I can't ping from the PC to the Server. >>What should "sho int trunk" show on SW1?
Packet tracer may not be simulating it correctly. You may have better success with it on the live gear in your lab. Thanks for your post!
Keith
Keith Barker Hey thanks for the reply. So... is my assumption correct? Will SW1 show, in "sho int trunk", that it is allowing vlan 2, 3, and 23 through it? Or, being in the middle like that, does it care what vlans are flowing through it?
Thanks.
bskwaj Look at the video at around 15:20. The trunk, by default, allows all existing VLANs to go through. Whether or not there is actually transit traffic to send on all the VLANs is another story, but by default all VLANs are allowed on trunks.
Keith Barker Ok, thanks, and I understand about the VLANs being allowed on trunks, but following your video, I tried this on Packet Tracer with 2960 switches and 2811 routers and at home, on real equipment, I was using 3550 (ipservices) switches and 1841 routers. In both cases, SW2 does not see vlan 3 and SW3 does not see vlan 2. R4 sees 23.0.0.3 with 'sho ip eigrp neighbor', and R6 see 23.0.0.2. But, I can't ping between 23.0.0.2 and 23.0.0.3. I can ping between the PC and R4 and I can ping between R6 and the Server. I double checked all port configuartions and cables and it all mirrors your setup. The pesky part seems to be with SW1. So, I'm thinking that maybe you had some other configuartion detail previously configured on SW1 in the middle that does not show up in this video... maybe. And, about SW1, should the output of 'sho int trunk' show the active vlans 2,3,23? Thanks.
Edit: Maybe I'm having an eigrp 'flapping' issue... new adjancency... retry limit exceeded... new adjacency... retry limit exceeded... etc... still troubleshooting. :-)
bskwaj Packet Tracer (PT) is a simulator (program) and they may not have programmed all the exact correct responses regarding how the devices are configured. PT is great most of the time, and a terrific tool for learning.
what model is the switches and routers
This video was done in GNS3, so they were virtual routers and switch modules (also emulated) that were in the virtual routers.
You mention several 'basic' videos at 1:30 in, can you post links to them? Additionally, what is the best order to view your videos in? Thanks!
Eddie Thrasher If you go to "Keith Barker Networking" on TH-cam, and then click on the "Playlists" link, there are several playlists, which contain videos related to specific topics. You can go through the list of videos, and simply select (based on the titles) the videos you would like to watch. If you are new to networking, and want a full course on the basics, the Network+ N10-006 course at CBTNuggets.com may be of interest to you. If you are not a member there, you can sign up for a free 7 day trial, and watch as many videos as you would like from CBTNuggets.com for free during that time.
Thanks for the question.
Why u use SW1 in this topology? is it impossible to conncet PC to Server without SW1?