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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.

You can download and practice this sim with Packet Tracer at: http://congressreiki.ranm.org/?all=download/9tut.com_CCNA_VLAN_Troubleshooting_Sim.zip

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 (6) Comments
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  1. dump
    January 12th, 2019

    Please sent dump to thenetworkdummy at gmail dot com

  2. bill
    January 14th, 2019

    can not remember if this came up in my icnd1 exam. will be real pain to fix lol.

  3. Super Anonymous
    January 15th, 2019

    Someone can verify, when I download the packet tracer the switch 2 was not trunked in switch 1. I think switch 2 e0/1 should be trunk in switch 1. thanks in advance.

  4. bill
    January 15th, 2019

    @Super Anonymous this is all confusing, because the interface ports in the sim at top of this page, does not match interfaces in the packet tracer sim lol. so i ended up creating more problems :)

    yep link between switch 1 and switch 2 need to be trunked at both ends.

  5. Super Anonymouse
    January 17th, 2019

    @bill hi bill, I passed my CCNA lately and this sim still valid, and in the exam SW1 and SW2 was trunked, only SW1 and SW3 need to be trunk! and native vlan mismatched.

  6. Adelino
    January 19th, 2019

    thank you very much 9tut

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