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VLAN Troubleshooting Sim

January 27th, 2018 Go to comments

Refer to the exhibit.


Your colleague has built a Layer 2 network in your client locations. You must verify the configuration and fix any issues identified as per customer requirements.
Customer requirements:
+ Verify if switch ports are assigned correct VLANs as shown in topology. Identify and fix any misconfiguration found in three switches
+ Verify if trunk links are operational between switches and the IEEE 802.1Q trunk encapsulation method is used. Identify and fix any misconfiguration found in trunk configuration
+ Make sure ports connected between switches are set as trunk ports

We are not sure about the details but here are the faults in this sim:

– Native VLAN mismatch between SW1 & SW3
– Switchport mode mismatch: one in access mode while the other end in trunk mode -> need to change from access to trunk mode
– One port in VLAN 500 while other port in VLAN 600

Recommended commands to solve this sim: show int trunk, show vlan, show run.

Commands to fix the issues:

SW1, SW2:
interface e0/2
 switchport mode access
 switchport access vlan 500
interface e0/3
 switchport mode access
 switchport access vlan 600

interface e0/0 (or interface e0/1 of SW1)
 switchport trunk encapsulation dot1q
 switchport mode trunk
 switchport trunk native vlan … (must match the native VLAN on the other end, use “show int trunk” command on SW1 to check SW1 native VLAN)

Comments (17) Comments
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  1. prime time
    April 23rd, 2018

    please can someone send the latest dump to starteralex @ y a h o o dot c o m

  2. Anyone?
    April 23rd, 2018


  3. Carlos
    April 23rd, 2018

    Whould you please provide PKT for this?

  4. S
    April 25th, 2018

    Exhibit in packet tracer plzz

  5. Markus
    April 30th, 2018

    Hello everyone! anyone does have a pkt for this?

  6. Akbar
    May 1st, 2018

    How to Practice this Sim in Packet Tracer?

  7. Kate D
    May 2nd, 2018

    This is what I did on my exam. You may follow it.

    config terminal

    1- access – vlan
    Interface fx/y ( sw1 – sw2 e0/2 )
    Switchport mode access
    Switchport access vlan X

    2- trunk
    Interface fx/y ( sw3 – e0/0)
    switchport trunk encapsulation dot1q
    Switchport mode trunk

    3- trunk – Vlan
    Interface fx/y ( sw1 – e0/1 )
    Switchport trunk native vlan Y ( y is usually 1 )

    Don’t forget to copy run start.

  8. David
    May 3rd, 2018

    @9tut Where is the actual sim for this. I am just seeing the answer. Also I am not seeing this on the right side of the page. Are there other sims that you can provide us, and if there are can you put them with the others on the right side of the page?
    Thank you so much this site is great!!!!!!!

  9. thang
    May 7th, 2018

    Help!! how to configuration on sw1 when it has not connect console

  10. Markus
    May 8th, 2018

    to: jioj Dude! you are forcing people to what’s up messenger with a fake google drive link?????

    Very low man Very low

  11. @pakhi
    May 11th, 2018

    pakhitmt tee ndd

  12. anthony l
    May 12th, 2018

    Hi jioj, your file can’t open it, can you reload it

  13. Vinny
    May 20th, 2018

    @9tut can you please write the commands for this Switchport mode mismatch: one in access mode while the other end in trunk mode -> need to change from access to trunk mode.

  14. vinny
    May 21st, 2018

    @9tut sim for this lab please or provide all the commands in more detail way.

  15. Howard
    May 21st, 2018

    The Chinese dumps are legit. I just passed CCNA 9XX.

  16. Khan
    May 22nd, 2018


    do you know where i can get the chinese dumps?

  17. Navin
    May 24th, 2018

    I am trying to answer this question. Can someone please help in giving me a solution. The issue lies in understanding VLAN setting on SW3 and SW1. Better still if someone can give me PT solution for this would be very helpful.


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