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Trunking Questions

March 16th, 2020 in ENCOR 350-401 Go to comments

Question 1

Explanation

SW3 does not have VLAN 60 so it should not receive traffic for this VLAN (sent from SW2). Therefore we should configure VTP Pruning on SW3 so that SW2 does not forward VLAN 60 traffic to SW3. Also notice that we need to configure pruning on SW1 (the VTP Server), not SW2.

Question 2

Explanation

From the “show vlan brief” we learn that Finance belongs to VLAN 110 and all VLANs (from 1 to 1005) are allowed to traverse the trunk (port-channel 1). Therefore we have to remove VLAN 110 from the allowed VLAN list with the “switchport trunk allowed vlan remove ” command. The pruning feature cannot do this job as Finance VLAN is active.

Comments
  1. Otter1
    March 20th, 2020

    Please explain how to get the dump? I have 69 days to recertifiy

  2. qwe
    April 9th, 2020

    Answer: A

    Explanation

    SW3 does not have VLAN 60 so it should not receive traffic for this VLAN (sent from SW2). Therefore we should configure VTP Pruning on SW3 so that SW2 does not forward VLAN 60 traffic to SW3.

    o_O ???????

    sw1 or sw 3 ?

    I mean I know that it is needed to be configured on the vtp server switch.

    I have already passed CCNP but aperently I should have passed all of them in 3 years all of them , but i didnt know that. so have to do it again.

  3. qwe
    April 22nd, 2020

    Same problem mate. I need to do ENCOR despite the fact that i passed 3 CCNP exams :-)

  4. Cai
    May 3rd, 2020

    Hi guys, same thing happen to me, I passed the 3 CCNP exams but never thought that it should have to complete within 3 yrs. So now I have to take this ENCOR to get the full Cert.

  5. BonezUK
    June 25th, 2020

    For the Trunking Questions, please correct me if I’m wrong regarding the command to remove the vlan. I beleive that the command should use the no form of the command and not remove, correct me if I’m wrong.

    Question 2

    Refer to the exhibit. SwitchC connects HR and Sales to the Core switch. However, business needs require that no traffic from the Finance VLAN traverse this switch. Which command meets this requirement?

    D. SwitchC(config)#interface port-channel 1
    SwitchC(config-if)#switchport trunk allowed vlan remove 110

    D. SwitchC(config)#interface port-channel 1
    SwitchC(config-if)#no switchport trunk allowed vlan 110

    AS per Cisco Documentation:

    switchport trunk allowed vlan
    To configure the allowed VLANs for a virtual Ethernet interface, use the switchport trunk allowed vlan command.

    To remove the configuration, use the no form of this command.

    switchport trunk allowed vlan {{ add | except | remove } vlan_list | all | none }

    no switchport trunk allowed vlan

  6. someDude
    July 7th, 2020

    you cant do the no command, you have to do remove. you can lab it up, you will see if you do the no command it will either remove the “switchport trunk allowed vlan” or it will carrot out.

  7. pk
    July 9th, 2020

    Can anyone plz tell me where are these questions?

  8. GZ
    July 12th, 2020

    @qwe:
    Q1 Answer: A
    Explanation: vtp pruning command is only acceptable on VTP server. The question says SW1 is VTP server so vtp pruning command is entered on SW1.

  9. KRISCO
    July 16th, 2020

    You don’t get the right answer at Q2 here when testing your knowledge using Flash Link.

  10. Mustafa
    July 31st, 2020

    @BonezUK if you mean you type no switchport trunk allowed vlan 110, you are basically erasing everything. Let me sho you

    SW# sho run int fa0/1
    switchport trunk allowed vlan 110,120
    !
    !
    SW(config)#int fa0/1
    SW(config-if)#no switchport trunk allowed vlan 110

    SW# sho run int fa0/1
    interface FastEthernet0/1
    !

    you see? no command will remove everything. When you want to add vlan always use “add” and when you want to remove vlan always use “remove” trust me, I learn it the have way LoL

  11. MD
    August 26th, 2020

    @GZ
    I agree – vtp pruning should only be applied on the vtp server.

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