Home > Ticket 17 – Switchport Encapsulation

Ticket 17 – Switchport Encapsulation

April 20th, 2018 in TSHOOT v2 Go to comments

On ASW1:

interface fa1/0/1
 switchport access vlan 10
 switchport mode trunk
 switchport trunk encapsulation dot1q
interface fa1/0/2
 switchport access vlan 10
 switchport mode trunk
 switchport trunk encapsulation dot1q



Ans1) ASW1
Ans2) Access VLANs
Ans3) In configuration mode, use ‘interface range fa1/0/1-2’ then ‘switchport mode access’, then ‘no switchport trunk encapsulation dot1q’

Note: In this ticket Client 1 still receives the IP address allocated from the DHCP server as the port it is connected is configured in trunking mode which accepts traffic sent from the DHCP server in VLAN 10.

Comments (47) Comments
  1. satoshi
    May 9th, 2018

    Has anyone who has encountered this question in the exam? please shed more info it.
    when a port has been configured as both access and trunk, which config prevails?
    does the command “switchport trunk encapsulation dot1q” effectively turn the port to a trunk?

  2. crisp
    May 9th, 2018

    yes this question is very much in the exam as of yesterday (may 8).

    @networktut, if it helps, there is no “no shut” for the interfaces. they are up, they only require the switchport mode access and the “no switchport trunk encapsulation dot1q”

    In the premium membership, when you practice any ticket, you can see its already written in there as a choice..

    Access VLANs
    In conf mode, use interface range fa1/0/1-2 then switchport mode access, then no switchport trunk encapsulation dot1q

  3. networktut
    May 10th, 2018

    @crisp: Thanks for your information. We have just updated this ticket.

  4. Good stuff
    May 10th, 2018

    What’s the difference between ticket 17 and ticket 8?

  5. Lora
    May 10th, 2018

    @Good stuff … there is a big difference.
    If you can’t see it dont go for the exam …. a port cannot be in trunk and access mode in the same time and not for a end point network device ….

  6. pirlitko
    May 10th, 2018

    Hi, this could be a little confusing. I think I saw some cisco catalyst switches with configuration like this acccidently working for clients because they treated this access vlan comand like it was native vlan and frames for that vlan were acceepted and forwarded as untagged. Of course, this is not correct client (access) configuration, but still, it could be vorking.

  7. Lora
    May 10th, 2018

    Agree, but cisco here they want to prove something else …

  8. SMH
    May 11th, 2018

    It’s not configured as both. It’s configured as a trunk because of ‘switchport mode trunk’. That’s what makes it a trunk.

    ‘switchport mode access vlan 10’ has no effect until you enter ‘switchport mode access’.

  9. Aid
    May 11th, 2018

    is there any update with the tickets, is there any new tickets than the 17 we have right now

  10. JH
    May 12th, 2018

    I received tshoot (300 – 135) on 12/5/2018.
    Unfortunately I did not pass at the 82x point.(><)

    I sharing because it seems that a problem has not been covered by the contents of the trouble ticket one point.

    1.Execution of traceroute from DSW1 to is completed.
    (I felt like being a ticket not on this site at this time.)
    2.ping from ASW 1 to and it does not reach
    3.client1 has been able to obtain the IP address by DHCP

    I initially assumed tiket 13 and tiket 17,
    but judged that it is a different problem from the condition of 3.

    After all, I did not know what is the problem to me and time to time has arrived.

    Since it seems that a new problem has appeared, attention is necessary. Please update quickly.

  11. scruff
    May 14th, 2018

    Does anybody know, what is IP of PC1 should be in TICKET 17? 169.254.x.x or ?

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    May 14th, 2018

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  13. gohan
    May 14th, 2018

    I did the exam on 11th May, and i can confirm that Ticket 17 is inside.
    Answer was like on Fa0/1 & Fa0/2 remove “switchport encapsulation dot1q” and set “switchport mode access”, or “switchport access vlan 10”. You will see it, if under Fa0/1 & Fa0/2 is something configured with switchport encapsulation dot1q or switchport mode trunk, not a big deal.
    I also can confirm, that BGP Simlet is not inside.
    HSRP Simlet with 4 “Questions is inside.
    All the NEW MCQ are in the Exam.

  14. Confuse guy
    May 15th, 2018

    @JH thanks for the observation

    Since u able to tracert up until – the route is cleared
    Ping from ASW1 doesnot reach
    – the only possible reason i can think is the line 30 below is removed

    R1#sh access-lists
    Standard IP access list Nat_Traffic
    10 permit (102 match(es))
    20 permit
    30 permit (72 match(es))

  15. Lam
    May 15th, 2018

    @ JH, The correct strategy is to ping/trace always from the clients towards server…..not for the devices in the middle (ASW,DSW,etc,etc)….simply where the trace stops you focus on that device and find the problem….

  16. Atoms-Dule
    May 15th, 2018

    @JH I agree with above the issue would have been something but the client ip perhaps threw you off and was a bug. A ping from the client and perhaps not always believing IPCONFIG on the client maybe a help…

    In this ticket I don’t believe we should get past switching elements the issue is with the switch(s)

  17. EREA
    May 24th, 2018

    Hi guys, is this ticket in replacement of the old ticket number 8?

  18. satoshi
    May 24th, 2018

    if it helps, output of #show vlan on ASW1 shows no ports assigned to vlan 10. Also ASW1 Output of #show interface trunk – displays ports FA 1/0/1-2 trunking of which they shouldn’t be trunking.

  19. yammer
    May 25th, 2018

    Becareful, show interface command does not work in the actual exam

  20. Mop
    June 4th, 2018

    Hi All,

    I have a question about the exam.

    Can you read the questions in each ticket before troubleshoot it?

    Best regards.

  21. Taron
    June 15th, 2018

    Passed today > 900
    All the questions are in networktut, HSRP+BGP Simplet, Tickets (I can’t say the exactly names, but all between the 17 tickets)
    All the MCQ questions are in Networktut

    I got 0% in VPN, so I failed the question about MTU. Definetively the order of the commands is important: the question refers to the Command Secuence


  22. Anonymous
    July 24th, 2018

    Ticket 8 and Ticket 17 looks the same??

  23. Anonymous
    August 5th, 2018


    T 8 and 17 are not the same. however if you check 8 and 17 with sh vlan you wont see the interfaces added to the VLAN, so you would need to check with sh run and see the port access those are differents on both tickets.

  24. eva
    August 15th, 2018

    @Taron, can you please share what is the question about the MTU which you missed please? Thanks.

  25. cissco
    September 25th, 2018

    do we become in the question (at the end the ipv6 IP adresses) the clue if is an IPV6 Ticket or not?

  26. Anonymous
    November 3rd, 2018

    so let me get this straight as i cant access devices (flash issue) .. interface fa1/0/1 & interface fa1/0/2 on ASW1 are the ports used to directly connect both clients.. so because they are trunk ports and not access ports this is why there is reachability issues towards WEB Server at so bringing them back down to access ports fixes this, right ?

  27. acheron538
    November 12th, 2018

    @Anonymous (comment from November 3rd):

    That’s right. They are trunk ports and the “switchport access vlan 10” has become obsolete because of the trunk configuration. Because (assuming it’s a standard config) the native VLAN is 1, and the traffic from the clients isn’t tagged, all traffic will be untagged in VLAN1. Because we need VLAN10, making it an access-port will be the right way to go. There are some other “tricks” you can do to make it work, but thats not the cisco way (or any way you want to do it ;) )

  28. Anonymous
    November 13th, 2018

    Thanks acheron538 :_

  29. Anonymous
    March 5th, 2019

    TT is not coming on My EXAM

    – Ticket 5 – R1 ACL
    – Ticket 13 – DHCP Helper-address
    – Ticket 14 – EIGRP Passive Interface

    I hat two TT IPv4 Route Redistribution on R4

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  31. Anonymous
    March 30th, 2019

    For ticket 17, the layer 2 vlan’s are not even created on ASW1. ASW2 shows vlan 20, 200. ASW1 should also have 10, 200. Anyway..

  32. kloo
    June 27th, 2019

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  33. bblack
    July 17th, 2019

    passed today 9xx
    read carefully the ticket, so you can know if it is about ipv6, got 11 A and B, bgp, nat, vlans ASW, no new questions, i guess i was wrong in tecnology on tickets, because i have doubts on redistributions and security tickets
    also hsrp simlet was there

  34. Nickname
    August 26th, 2019

    Cannot understand what the question is, if only the answer is posted.

  35. Anonymous
    August 26th, 2019

    Hi all,
    We can use traceroute command from PC Client in the Tickets? or just can use ping command?

  36. ggeai
    September 3rd, 2019

    traceroute run only on DSW1

  37. Anonymous
    September 3rd, 2019

    can we use “show Run” command in the exam for tickets?

    September 23rd, 2019

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  40. Chorri
    November 10th, 2019

    Passed yesterday with 96X! It was my last exam for CCNP :)

    My feedback:

    MCQ from October are still valid!

    – Same BGP Simlet

    – Same Tickets from Networktut:

    – OSPF Auth
    – BGP neighbor
    – NAT ACL (the interface towards ISP had “ip nat inside”)
    – VLAN Filter
    – Switchport Trunk allow vlan 10 in ASW1
    – Route Redistribution
    (Change: In the route map OSPF->EIGRP you have to delete a line and add another: delete “deny 20” then add “permit 20”, the route map has all lines with deny)


    route-map OSPF->EIGRP deny 10
    match tag 90
    route-map OSPF->EIGRP deny 20
    set tag 110


    route-map OSPF->EIGRP deny 10
    match tag 90
    route-map OSPF->EIGRP permit 20
    set tag 110

    – IPv6 OSPF
    – DHCP Helper-address
    – EIGRP Passive Interface
    – IPV6 GRE Tunnel
    – IPv6 RIPng OSPFv4 Redist
    – Switchport Encapsulation
    (Attention: Besides the original answer “use ‘interface range fa1/0/1-2’ then ‘switchport mode access’, then ‘no switchport trunk encapsulation dot1q’”; use “show ip int bri” to see if the interface towards the client is shutdown, in my case was, and there is an answer that adds “no shutdown to interface fa1/0/1”, you have to pick that)

    – You can not do tracert from Clients (even if the Instructions say so, do it from DSW1)
    – Start with “ipconfig” in Client, and if you see a IP: 169.X.X.X you can go for ASW1 and continue isolating about SWITCHPORT ACCESS/TRUNK, etc, If Client have IP: 10.2.1.X go traceroute from ASW1
    – You can not type colon (:) in the TTs, so i couldnt traceroute in IPv6 questions and i had to use “show ipv6 route” to start isolating
    – And the most important: Analyze the TTs, dont memorize answers, practice the commands that isolate the fault, you have to get confidence about your isolation techniques so you wont get lost. For example: Traceroute ipv6 is an easy way to isolate in lab but in the exam i couldnt type colon (:) so i had to use another way to isolate, you have to practice that

    Thanks everyone in this forum for helping each other with their feedback so people can go well prepared for exam!. I hope my feedback helps you.

    Good Luck to all!

  41. Alpha
    November 10th, 2019

    @chorri, what about mcqs ? Shall this be enough to read Oct and sept mcqs only ?

  42. mpoumplis
    November 16th, 2019

    Hello all

    i am wondering how it is possible for the client 1 to obtain ip address and in the same time is not able to ping the DSW1 switch

    any thoughts ?

  43. Sol
    December 4th, 2019

    Static address

  44. Nardini
    December 5th, 2019


    Could be vlan filter

  45. Ronin
    December 6th, 2019

    Passed today 9xx/1000

    No new questions for me

    BGP Sim did involve config changes required to EBGP and IBGP peers.

  46. Colonel
    December 12th, 2019

    Pass today 9xx/1000
    Dump NOV_2019 is still valid.
    – MCQ: the same.
    – Simlet: BGP + HSRP: the same.
    – Tickets: the same.
    I’m wrong in ticket 17 in ans 3, I choose “switchport access vlan 10”. :-(
    All I need is the dump and everything in this site.
    Thanks a lot:
    – Networktut.com.
    – Mr SAM, who make Ping_Plan_SAM.
    – Mr Buddy, Mr Marcus.
    – Evryone, who share exp in the exam.

  47. Jenny_chey
    January 3rd, 2020

    @Colonel could you please share your materials from Mr Buddy, Mr Marcus

    Could you please send to jenny_chey @ y a hoo.co m