40 Responses to “Topology: VLAN Trunking GNS3 Lab - 802.1Q - Router On A Stick”

1. LBSources
   June 15th, 2008 at 6:13 pm

   Here is the config steps for those interested.. I modified them to the interfaces in this topology

   PC1#configure terminal
   no ip routing
   ip default-gateway 192.168.1.10
   interface e0/0
   ip address 192.168.1.1 255.255.255.0
   no shutdown
   end

   PC2#configure terminal
   no ip routing
   ip default-gateway 192.168.2.20
   interface e0/0
   ip address 192.168.2.1 255.255.255.0
   no shutdown
   end

   PC3#configure terminal
   no ip routing
   ip default-gateway 192.168.1.10
   interface e0/0
   ip address 192.168.1.2 255.255.255.0
   no shutdown
   end

   PC4#configure terminal
   no ip routing
   ip default-gateway 192.168.2.20
   interface e0/0
   ip address 192.168.2.2 255.255.255.0
   no shutdown
   end

   R1#configure terminal
   interface FastEthernet0/0
   no shutdown
   interface FastEthernet0/0.10
   encapsulation dot1Q 10
   ip address 192.168.1.10 255.255.255.0
   interface FastEthernet0/0.20
   encapsulation dot1Q 20
   ip address 192.168.2.20 255.255.255.0
   end

   ——SW1——-
   SW1#vlan database
   vlan 10 name vlan10
   vlan 20 name vlan20
   exit
   configure terminal
   interface f0/1
   switchport mode access
   switchport access vlan 10
   no shutdown
   exit
   interface f0/2
   switchport mode access
   switchport access vlan 20
   no shutdown
   exit
   interface f0/12
   switchport mode trunk
   switchport trunk encapsulation dot1q
   no shutdown
   exit
   interface f0/0
   switchport mode trunk
   switchport trunk encapsulation dot1q
   no shutdown
   end

   ——SW2——-
   SW2#vlan database
   vlan 10 name vlan10
   vlan 20 name vlan20
   exit
   configure terminal
   Enter configuration commands, one per line. End with CNTL/Z.
   interface f0/1
   switchport mode access
   switchport access vlan 10
   no shutdown
   exit
   interface f0/2
   switchport mode access
   switchport access vlan 20
   no shutdown
   exit
   interface f0/12
   switchport mode trunk
   switchport trunk encapsulation dot1q
   no shutdown
   end

2. csplau
   June 20th, 2008 at 10:37 pm

   Hello,
   How can I create Sw1 and Sw2? Using cisco3600 router? I did it. But, the switchmode port trunk command is not support? vlan also cannot be created!!!

3. LBSources
   June 20th, 2008 at 10:45 pm

   remember that you must load the NM-16ESW port module in the slot.

4. GNS3 Tutorials: BlindHog - How to build a switching lab | GNS3 Labs :: Cisco Router Simulator Network Topologies
   July 25th, 2008 at 11:40 am

   [...] case you have had a look at our Topology: VLAN Trunking GNS3 Lab - 802.1Q - Router On A Stick & need some help with configurations have a look over at [...]

5. blindhog.net » GNS3 - Switching lab part 2 (router on a stick)
   July 29th, 2008 at 2:57 am

   [...] References: http://www.gns3-labs.com/2008/06/15/topology-vlan-trunking-gns3-lab-8021q-router-on-a-stick/ [...]

6. GNS3 Tutorials: BlindHog - How to build a switching lab Part 2 | GNS3 Labs :: Cisco Router Simulator Network Topologies
   July 29th, 2008 at 6:37 am

   [...] You can also find some help in my lab GNS3-Labs:: Topology: VLAN Trunking GNS3 Lab - 802.1Q - Router On A Stick [...]

7. Chris SMith
   October 4th, 2008 at 5:52 pm

   Great lab - but no step by step testing or explanations for beginners.

8. LBSources
   October 4th, 2008 at 6:04 pm

   Hey Chris.. As I have said elsewhere..

   Hey Chris .. These are not my goals. My goals are to compile complete labs I use for my own testing, or that others share, package them nicely and share with you all. You can then do your own testing and break-fix scenarios. I’m far from an instructor or have the knowledge to build test labs for others to solve.

   You can learn more about the site here: http://www.gns3-labs.com/about-gns3-labs/

9. Chris Smith
   October 4th, 2008 at 8:50 pm

   LBSources . . . I hear you and I still appreciate your lab. Dynamips and GNS3 are very good stuff. I’ve been going over your “Router on a Stick” lab and was at least expecting to have been able to ping 1 pc to another in the other vlan (or even in the same vlan) but was not able to. So I have to go over the configs to see if anything is missing. I was still pleasantly surprised to have it displayed and running on my instance of GNS3. The blindhog videos are great as well. I just need to read up on some networking material it seems. Thanks.

10. LBSources
    October 5th, 2008 at 12:09 pm

    Sounds like you already have a scenario in the lab which you must fix. All labs on this site are delivered fully working.. This lab in particular is also the #1 topology of the site and I’m sure that someone else would have reported it non-working it truly was broken ..

11. Chris Smith
    October 6th, 2008 at 12:29 am

    mmmmmm . . . sounds like reverse psychology to me. You wanted to come up with a broken lab so that people would have to work to fix it in the first place. Very good idea on your part!

12. Nhan
    November 19th, 2008 at 9:56 am

    I has run Vlantrunklab, after finish load the configuration, From any PC, I can’t ping the default gateway and the PC in same VLAN, it’s only ping successfully it’s Ip address.
    Please help me.
    I use the lastest GNS3.

13. LBSources
    November 21st, 2008 at 10:48 pm

    Nhan .. Thats the idea of labs buddy to sort it all out and get it working

14. rcastro
    December 10th, 2008 at 3:33 pm

    I followed all the step, IOS c3640-jk9s-mz.124-16a, loaded the NM-16ESW port module, I’m using GNS3-0.5, and dynamips-0.2.8-RC2-x86. my operative system is Kubuntu 8.4 with KDE 3, everything works as should, but the trunk isn’t working. Do you have any idea why this happen? Thanks a lot.

15. LBSources
    December 11th, 2008 at 7:22 am

    @rcastro That’s for you to figure out

16. nucleo
    January 7th, 2009 at 9:09 pm

    GNS3 does not save vlan database. May be this explains problem with this lab?

17. LBSources
    January 7th, 2009 at 11:33 pm

    @nucleo Create a new project from this lab .. You’ll get it working.. It can never be broken .. Its a architecture for you to correct.

18. nucleo
    January 8th, 2009 at 12:41 am

    I just open VLAN.Trunk.Lab.net with corrected path to ios and configs and then started lab.
    To make it working it is enough to do following steps
    ——SW1——-
    SW1#vlan database
    SW1(vlan)#vlan 10
    SW1(vlan)#vlan 20
    SW1(vlan)#exit

    ——SW2——-
    SW2#vlan database
    SW2(vlan)#vlan 10
    SW2(vlan)#vlan 20
    SW2(vlan)#exit

    Vlan databases are saved in files c3600_SW1_bootflash and c3600_SW2_bootflash which are not in vlantrunklab.rar archive.

19. LBSources
    January 8th, 2009 at 6:34 am

    @nucleo Great and that’s because those are working directory files which I never share due to size.

20. kamlesh Limbachiya
    January 20th, 2009 at 2:13 am

    hi ,
    i have download VLAN.Trunk.Lab.net .when i LOGIN by console to SW1 or SW2 ,in sw1 or sw2 i is not showing any interface in it running configuration.i also not able to apply any command related to vlan.

    so kindly provide the solution.

    Regards,
    Kamlesh Limbachiya

21. LBSources
    January 23rd, 2009 at 8:56 pm

    @Kamlesh Remember the limitations of using a switching module in a router within GNS3. There are limits to how much VLAN work you’ll get done in GNS3.

    Here is a list of what is missing with the 16 port switching module (NM-16ESW)

    http://www.gns3.net/phpBB/post645.html?hilit=vlan#p645

22. Jaap
    February 20th, 2009 at 6:01 am

    Hi all,

    Also stumbled on this one :(.
    However, after adding the vlan’s (Hub,SW1 & SW2) I wasn’t able to ping from and to the nodes attached to SW2.
    I checked the trunk between Sw1 & SW2: show int fa0/12 switchport
    ans everything looked fine, but it didn’t work.
    After deleting the trunk (line) and adding it back again, it worked fine.
    Pinging all over te place :).

    Greetz Jaap

23. berry Numbi
    March 7th, 2009 at 6:28 am

    great is ya job guyz!!!!!

24. Paulo
    March 29th, 2009 at 4:21 pm

    Hi LBS,

    Besides “switchport” command, I’ve noted that “interface vlan” is supported only with NM-16ESW installed. Is this correct? I also tried this lab but I didn’t use NM-16ESW on the R1, but my ping wasn’t successful. Any ideas?

25. Tumur
    April 13th, 2009 at 12:26 am

    Is there configuration in the HUB? how to send ping from PC4 to HUB ?

26. runssh
    April 18th, 2009 at 7:08 am

    Deleting and then adding the trunk lines didn’t help. SW2 shows fa0/12 line and protocol is up but SW1 fa0/12 shows line is up but protocol is down. Encapsulation is the same as how you’ve configured. Any ideas? TIA

27. runssh
    April 18th, 2009 at 4:04 pm

    Ok, so I detected mismatched duplex issue with the NM on SW1 and SW2. I’m replacing the NM4E modules with FE modules on all the other routers and post back soon. TIA

28. runssh
    April 18th, 2009 at 4:10 pm

    BTW, I tried setting the FEs to half duplex and speed settings to 10 but it was still detecting mismatches so I gave up…

29. runssh
    April 18th, 2009 at 6:54 pm

    This lab works. If you’re going to install NM4E on the Hub and PCs(routers), try to see if you can match the half duplex/speed on both SW1 and SW2. Otherwise, install FE modules for all the routers except SW1 and SW2. Thanks a bunch!!!

30. LBSources
    April 26th, 2009 at 3:35 pm

    @runssh Glad I could help Seriously, sorry I didn’t get to your questions.

    @Tumur The configuration for the hub are already there.

    @Paulo What did you use then?

31. Halil ERDUR
    August 8th, 2009 at 3:43 am

    this works fine…..thansk a lot men..

32. jagdish
    February 15th, 2010 at 9:11 am

    hi
    i am using ubuntu and install gns3 and i follow all the step above by adding switch slot but that router(3660) could not support switchport command.is anything type before that command.

33. andrew
    March 5th, 2010 at 8:52 am

    hy all.. nice easy “roast” lab…this is basic stuff..if you switch to cisco packet tracer 5.2 you will have a much better interface to work from.gns3 is ok but i find it very limited.

34. LBSources
    March 5th, 2010 at 12:07 pm

    @Andrew .. I haven’t used packet tracer at all, but I’ve heard that it doesn’t compare to the abilities of GNS3, at least with routing capabilities. GNS3 just lacks real switching.

35. andrew
    March 5th, 2010 at 5:17 pm

    yes your right..packet tracer has limited routing and gns3 is pretty good..like being able to use real ios images..but i only use packet tracer to check out my configs and labs before i move on to my real set up..gns3 switching limitations is a real bummer when your studying for exams.(having to configure routers as dummy switches is good command and config practice but for the less experienced its quite daunting).i use gns3 for more complicated routing configs and packet tracer for everthing else..i just think that some of the guys on here would not be having the problems they are having with a clear context.
    they could move back to gns3 for routing configs as they gain experience..
    anyway.. cool labs and good help and advice..like you i cant speak more highly of chris bryant and the bryant advantage…

36. googoosh
    May 5th, 2010 at 6:58 am

    hub is router or switch?

37. googoosh
    May 5th, 2010 at 6:59 am

    ohh sorry of course router

38. sam
    June 11th, 2010 at 8:13 am

    from where should i download ios for gns3

39. LBSources
    June 12th, 2010 at 7:57 am

    @Sam, We do not provide any IOS to anyone. It’s up to you to obtain the IOS. Please do not ask here for it.

40. Projet
    June 22nd, 2010 at 11:06 am

    We are using GNS3 0.7.1. We tried a simple topology with 3 routers 3640(one acting as a PC with a slot NM-1FE-TX, one as a switch with a slot NM-16ESW and one real router with a slot NM-1FE-TX).
    The IOS image is: c3640-jk9s-mz.124-16a.bin
    We’re working on a Unix machine Sun.
    We write the same configuration as yours. But we can’t ping from the PC to the router!
    Do you have any idea what may be the problem?
    Thank you

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