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LACP with STP Sim

March 12th, 2017 in Lab Sim, LabSim Go to comments

Question

You work for SWITCH.com. They have just added a new switch (SwitchB) to the existing network as shown in the topology diagram.

LACP_STP_topology.jpg

RouterA is currently configured correctly and is providing the routing function for devices on SwitchA and SwitchB. SwitchA is currently configured correctly, but will need to be modified to support the addition of SwitchB. SwitchB has a minimal configuration. You have been tasked with competing the needed configuring of SwitchA and SwitchB. SwitchA and SwitchB use Cisco as the enable password.

Configuration Requirements for SwitchA

– The VTP and STP configuration modes on SwitchA should not be modified.
– SwitchA needs to be the root switch for vlans 11, 12, 13, 21, 22 and 23. All other vlans should be left are their default values.

Configuration Requirements for SwitchB

– Vlan 21, Name: Marketing, will support two servers attached to fa0/9 and fa0/10
– Vlan 22, Name: Sales, will support two servers attached to fa0/13 and fa0/14
– Vlan 23, Name: Engineering, will support two servers attached to fa0/15 and fa0/16
– Access ports that connect to server should transition immediately to forwarding state upon detecting the connection of a device.
– SwitchB VTP mode needs to be the same as SwitchA.
– SwitchB must operate in the same spanning tree mode as SwitchA.
– No routing is to be configured on SwitchB.
– Only the SVI vlan 1 is to be configured and it is to use address 192.168.1.11/24.

Inter-switch Connectivity Configuration Requirements:

– For operational and security reasons trunking should be unconditional and Vlans 1, 21, 22 and 23 should tagged when traversing the trunk link.
– The two trunks between SwitchA and SwitchB need to be configured in a mode that allows for the maximum use of their bandwidth for all vlans. This mode should be done with a non-proprietary protocol, with SwitchA controlling activation.
– Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link.

Answer and Explanation:

We post the initial configuration of Sw-A & Sw-B here for your reference, you can try solving this sim by yourself before reading the asnwers below:

Initial Configuration (useless lines have been removed)

SwA:
hostname Sw-A
!
vtp mode transparent
!
spanning-tree mode rapid-pvst
!
vlan 98
!
vlan 99
 name TrunkNative
!
interface FastEthernet0/1
 switchport access vlan 98
 switchport mode access
!
interface FastEthernet0/3
 switchport access vlan 98
 switchport mode access
!
interface FastEthernet0/4
 switchport access vlan 98
 switchport mode access
!
interface Vlan1
 no ip address
 shutdown
!
end
Sw-B:
hostname Sw-B
!
vtp mode server
!
spanning-tree mode pvst
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface Vlan1
 no ip address
 shutdown
!
ip default-gateway 192.168.1.1
!
end

Solution

SW-A (close to router)
Note: If Sw-A does not have Vlan 11, 12, 13 we have to create them first with command “SW-A(config)#vlan 11,12,13”
SW-A(config)#spanning-tree vlan 11-13,21-23 root primary

SW-A(config)#vlan 21
SW-A(config-vlan)#name Marketing
SW-A(config-vlan)#exit

SW-A(config)#vlan 22
SW-A(config-vlan)#name Sales
SW-A(config-vlan)#exit

SW-A(config)#vlan 23
SW-A(config-vlan)#name Engineering
SW-A(config-vlan)#exit
SW-A(config)#interface range fa0/3 – 4
SW-A(config-if-range)#no switchport mode access
SW-A(config-if-range)#no switchport access vlan 98 (These two commands must be deleted to form a trunking link)
SW-A(config-if-range)#channel-group 1 mode active
SW-A(config-if-range)#channel-protocol lacp
SW-A(config-if-range)#no shutdown
SW-A(config-if)#interface port-channel 1
SW-A(config-if)#switchport mode trunk
SW-A(config-if)#switchport trunk native vlan 99 //this command will prevent the “Native VLAN mismatched” error on both switches
SW-A(config-if)#switchport trunk allowed vlan 1,21-23
SW-A(config-if)#no shut

Note: When you apply commands under “interface port-channel 1”, the same commands will be automatically applied to the physical member interfaces (of port-channel 1) so you don’t need to type them under physical member interfaces again.

——————————————————————————————–

SW-B (far from router)
SW-B(config)#vlan 21
SW-B(config-vlan)#name Marketing
SW-B(config-vlan)#exit

SW-B(config)#vlan 22
SW-B(config-vlan)#name Sales
SW-B(config-vlan)#exit

SW-B(config)#vlan 23
SW-B(config-vlan)#name Engineering
SW-B(config-vlan)#exit
SW-B(config)#vlan 99
SW-B(config-vlan)#name TrunkNative // not necessary to name it but just name it same as SwitchA
SW-B(config-vlan)#exit
SW-B(config)#interface range fa0/9 – 10
SW-B(config-if-range)#switchport mode access
SW-B(config-if-range)#switchport access vlan 21
SW-B(config-if-range)#spanning-tree portfast
SW-B(config-if-range)#no shutdown
SW-B(config-if-range)#exit

SW-B(config)#interface range fa0/13 – 14
SW-B(config-if-range)#switchport mode access
SW-B(config-if-range)#switchport access vlan 22
SW-B(config-if-range)#spanning-tree portfast
SW-B(config-if-range)#no shutdown
SW-B(config-if-range)#exit

SW-B(config)#interface range fa0/15 – 16
SW-B(config-if-range)#switchport mode access
SW-B(config-if-range)#switchport access vlan 23
SW-B(config-if-range)#spanning-tree portfast
SW-B(config-if-range)#no shutdown
SW-B(config-if-range)#exit

SW-B(config)#vtp mode transparent

SW-B(config)#spanning-tree mode rapid-pvst //Same as Sw-A

SW-B(config)#ip default-gateway 192.168.1.1 (you can get this IP from SW-A with command show cdp neighbour detail) // not sure about this command because the question says “No routing is to be configured on SwitchB”.

SW-B(config)#interface vlan 1
SW-B(config-if)#ip address 192.168.1.11 255.255.255.0
SW-B(config-if)#no shutdown
SW-B(config-if)#exit

SW-B(config)#interface range fa0/3 – 4
SW-B(config-if-range)#channel-group 1 mode passive //mode passive because “SwitchA controlling activation”
SW-B(config-if-range)#channel-protocol lacp
SW-B(config-if-range)#no shutdown

SW-B(config-if)#interface port-channel 1
SW-B(config-if)#switchport trunk encapsulation dot1q
SW-B(config-if)#switchport mode trunk
SW-B(config-if)#switchport trunk native vlan 99 //this command will prevent the “Native VLAN mismatched” error on both switches
SW-B(config-if)#switchport trunk allowed vlan 1,21-23
SW-B(config-if)#no shut

Note: For Sw-B we have to set the 802.1q trunking protocol (switchport trunk encapsulation dot1q) before converting it into a trunk because it is a 3500 series (or higher) switch which supports both ISL and 802.1Q and we have to explicitly set which trunking protocol to be used. Sw-A is a 2900x series (or lower) switch and does not support ISL trunking protocol (802.1Q is the only supported trunking protocol) so we can apply “switchport mode trunk” directly.

———————————————————

Some guidelines for configuring SwitchA & SwitchB:

Configuration Requirements for SwitchA

– The VTP and STP configuration modes on SwitchA should not be modified.
– SwitchA needs to be the root switch for vlans 11, 12, 13, 21, 22 and 23. All other vlans should be left are their default values
SW-A(config)#spanning-tree vlan 11-13,21-23 root primary

Configuration Requirements for SwitchB

– Vlan 21, Name: Marketing, will support two servers attached to fa0/9 and fa0/10
– Vlan 22, Name: Sales, will support two servers attached to fa0/13 and fa0/14
– Vlan 23, Name: Engineering, will support two servers attached to fa0/15 and fa0/16
– Access ports that connect to server should transition immediately to forwarding state upon detecting the connection of a device.
vlan …
name …
(VLANs must be created on both switches if not exist)
interface range fa0/x – y
switchport mode access
switchport access vlan
spanning-tree portfast
– SwitchB VTP mode needs to be the same as SwitchA. vtp mode transparent
– SwitchB must operate in the same spanning tree mode as SwitchA. spanning-tree mode rapid-pvst
– No routing is to be configured on SwitchB.
– Only the SVI vlan 1 is to be configured and it is to use address 192.168.1.11/24.
interface vlan 1
ip address 192.168.1.11 255.255.255.0

Inter-switch Connectivity Configuration Requirements:

– For operational and security reasons trunking should be unconditional and Vlans 1, 21, 22 and 23 should tagged when traversing the trunk link.
– The two trunks between SwitchA and SwitchB need to be configured in a mode that allows for the maximum use of their bandwidth for all Vlans. This mode should be done with a non-proprietary protocol, with SwitchA controlling activation.
SW-A(config)#interface range fa0/3 – 4
SW-A(config-if)#no switchport mode access
SW-A(config-if)#no switchport access vlan 98
Note: Two above commands must be deleted first to form a trunking link.

Although the first requirement asks us to configure trunking but we can ignore this task because we only need to configure trunking under their Port-channel (in the next task)

– The two trunks between SwitchA and SwitchB need to be configured in a mode that allows for the maximum use of their bandwidth for all Vlans:
SW-A(config)#interface range fa0/3 – 4
SW-A(config-if)#channel-group 1 mode active
SW-A(config-if)#channel-protocol lacp
SW-A(config-if)#no shutdown
– Trunking should be unconditional and Vlans 1, 21, 22 and 23 should tagged when traversing the trunk link:
SW-A(config-if)#interface port-channel 1
SW-A(config-if)#switchport mode trunk
SW-A(config-if)#switchport trunk native vlan 99 //this command will prevent the “Native VLAN mismatched” error on both switches
SW-A(config-if)#no shut
—————————————
SW-B(config)#interface range fa0/3 – 4
SW-B(config-if)#channel-group 1 mode passive
SW-B(config-if)#channel-protocol lacp
SW-B(config-if)#no shutdown
SW-B(config-if)#interface port-channel 1
SW-B(config-if)#switchport trunk encapsulation dot1q
SW-B(config-if)#switchport mode trunk
SW-B(config-if)#switchport trunk native vlan 99 //this command will prevent the “Native VLAN mismatched” error on both switches
SW-B(config-if)#no shut

– Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link. SW-A(config)#interface port-channel 1
SW-A(config-if)#switchport trunk allowed vlan 1,21-23
—————————————
SW-B(config)#interface port-channel 1
SW-B(config-if)#switchport trunk allowed vlan 1,21-23
Note: When configure this command under Port-channel 1, the same command will be applied to physical member interfaces (of port-channel 1) so you don’t need to type them under physical member interfaces again.

Some notes for this sim:
+ You should check the initial status of both switches with these commands: show vtp status (transparent mode on switchA and we have to set the same mode on switchB), show spanning-tree [summary] (rapid-pvst mode on switchA and we have to set the same mode on switchB), show vlan (check the native vlan and the existence of vlan99), show etherchannel 1 port-channel and show ip int brief(check if Port-channel 1 has been created and make sure it is up), show run (to check everything again).
+ When using “int range f0/x – y” command hit space bar before and after “-” otherwise the simulator does not accept it.
+ You must create vlan 99 for the switchB. SwitchA already have vlan 99 configured.
+ At the end, you can try to ping from SwitchB to RouterA (you can get the IP on RouterA via the show cdp neighbors detail on SwitchA), not sure if it can ping or not. If not, you can use the “ip default-gateway 192.168.1.1” on SwitchB.
+ The name of SwitchA and SwitchB can be swapped or changed so be careful to put your configuration into appropriate switch.

We hope with this information our candidates can find the best solution in the exam. If you learn anything new about this sim please share with us!

Other lab-sims in this site:

MLS and EIGRP Sim
VTP Lab 2
VTP Lab
Spanning Tree Lab Sim
AAAdot1x Lab Sim

Comments
Comment pages
1 50 51 52 52
  1. mrbean
    June 18th, 2017

    Hi Bane… I will take it again on thursday… need to do it this month because my ccna is expiring on 1 July… :x I know I let too much time passing by… lol

  2. MAster
    June 18th, 2017

    @User , please send 376 q in PDF or downgrade as I have same problem like mrbean

    please ASAP as my exam after tomorrow

  3. user
    June 18th, 2017

    Guys, here’s a greater version of VCE Player from RatedR

    https://www.dropbox.com/s/5xb0u1cbwx5ocez/vce_exam_simulator_complete%202017.rar?dl=0

  4. X6
    June 19th, 2017

    Hi user ! I think you are from other comment page where we discuss about multiple choice questions. Can you help me with the following issue ?

    I use the lab downloaded from here. But Initial configuration on SW-A shows vlan 11, vlan 12, vlan 13 , but according to BeRgEnHoLtZ , on June 15th, 2017 on other comment page , only SW-B has those vlans with name ‘ADM’, BDM’, ‘CDM’ in the exam.

    But here lab is quite look different & when I rename all those vlan 11, 12,13 on SW-A to ADM, BDM, CDM, I am unable to see those vlans, when I issued the command ‘ sh run ‘ on SW-A. But I can see those when i issue command ‘sh vlan’ on SW-A.

    But On SW-B, I can see them under ‘ sh run ‘ & ‘ sh vlan ‘, after renaming those vlan 11, 12, 13 with respective name.

    Have you encountered similar issue ?

  5. mrbean
    June 19th, 2017

    Hi X6, well I had to create the VLAN’s 11,12,13 on Switch A. After you can leave it..

    but if they are already created just don’t touch them.. :) and make the other vlans needed.

  6. X6
    June 19th, 2017

    Hi mrbean,

    Thank you for your reply.

    yes, it is already created on SW-B, but I just wanted to name them as ADM, BDM & CDM on SW-B. But on Sw-A, I have to create them & have to name them as well as it is on SW-B.

    My Question is, After creating, I can not see them when I use ‘Sh run’ command on SW-A. but I can see those vlans under ‘sh vlan’ on SW-A. why ?

  7. mrbean
    June 19th, 2017

    I think something went really wrong there… I’ve done first switch A and then B and gave the names as it is in the question…

    and I had no problems and could also see the vlans in the show run… the behaviour you tell is really strange… well on thursday I will do the exam again then I can tell you more about it :)

  8. X6
    June 19th, 2017

    @mrbean

    Where did you download your lab ? here on certprepare ? I downloaded form the links given above in this page. Did you create on your own ? if so, Can you provide me gdrive link so that i can download & practice ?

  9. mrbean
    June 19th, 2017

    the lab I could not practice.. I just printed out what is here in the website and then tried to make it on my own… several times.. till I got it perfect :)

    you really need a simulatior or something to do the labs… but we have nothing like that to practice.. but if you know exactly the steps and the main commands you should be fine…

    in the exam you can use tab (but not ?) to see what commands are availabe.. but only the tab already helps a lot :)

    when will you have your exam ?

  10. Anonymous
    June 20th, 2017

    Hi mrbean, did you try the ? and it did not work? I remember when I did the CCNA reading something or being told that I could not use ?, but it worked. That really helped me a lot… if you can’t use it anymore that sucks, more studying to do for me. But I guess tab helps some then.

  11. Sauer
    June 20th, 2017

    X6 according cisco architecture you sould not be able to see the vlans under show run command they’re kept in the vlan.dat file wich is only visible since show vlan command

    Mr been please tell me: if the instructions do not ask to create the server vlans in the switch a just add them to the trunk, is it suppose anyway to be created

  12. mrbean
    June 20th, 2017

    in my exam the vlans 11,12 and 13 were already existing… so I just did the commands as they are here on the website.. all worked fine :)

    just the trunk port you have to do different.. do all configuration in the “inter range fa0/13 – 14”
    and dont touch the “inter po1” which will be created automatically when you configure the physical interfaces…

  13. sauer
    June 20th, 2017

    Thank you so much Mr bean!

  14. June23Exp
    June 21st, 2017

    Hi All ,

    When you try the config scripts in CLI . Is the tab functionalities and “?” are still working? Or not anymore for the labs. Thanks in advance

  15. MAster
    June 21st, 2017

    Guys command >> interface range f0/3-4 >>give me incomplete command … what is the solution for this ?????

  16. Sni
    June 21st, 2017

    Hi MAster,
    I have done the Exam today and the right command is interface range fa0/3 – 4.
    You need a blank between 3 and – and 4.
    Then It ist Working.

    Another question is, in the exam the Port-Channel 1 is going down at Switch a.
    The commands I User are right.
    The sh Interface Show me that the Hardware are Lance not Ethernet.
    Any Ideas?

    Thanks vor your Support.

  17. Exam Dumps
    June 21st, 2017

    Hi guys,

    We have Cisco VCE latest dumps available at a minimal price. just drop an email at {email not allowed}

  18. Exam Dumps
    June 21st, 2017

    Hi guys,

    We have Cisco VCE latest dumps available at a minimal price. just drop an email at itexams4allATgmail.com

  19. mrbean
    June 21st, 2017

    Hi Master, you just put the whole config like this:

    SW-A(config)#interface range fa0/3 – 4
    SW-A(config-if-range)#no switchport mode access
    SW-A(config-if-range)#no switchport access vlan 98
    SW-A(config-if-range)#channel-protocol lacp
    SW-A(config-if-range)#switchport mode trunk
    SW-A(config-if-range)#switchport trunk native vlan 99
    SW-A(config-if-range)#switchport trunk allowed vlan 1,21-23
    SW-A(config-if-range)#shut

    I would put the interfaces on shut because if not you will get many errors and the ports can be put in err disabled/shut.. and then you need to enable it.

    on the Switch B

    SW-B(config)#interface range fa0/3 – 4
    SW-B(config-if-range)#channel-group 1 mode passive
    SW-B(config-if-range)#channel-protocol lacp
    SW-B(config-if-range)#switchport trunk encapsulation dot1q
    SW-B(config-if-range)#switchport mode trunk
    SW-B(config-if-range)#switchport trunk native vlan 99
    SW-B(config-if-range)#switchport trunk allowed vlan 1,21-23
    SW-B(config-if)#no shut

    then you can make a no shut on the interfaces 3 and 4 on switch A.
    then the port channel should come up properly.
    this is how I’ve done it.

  20. mrbean
    June 21st, 2017

    forgot this command for switch A after channel-protocl lacp… :)

    SW-A(config-if-range)#channel-group 1 mode active

  21. wallies
    June 22nd, 2017

    Why should you config switch a as LACP passive?
    I know it is the most clean config but to config both switches in LACP active mode should be oke two right ?

    Further very nice what you guys are doing here. I try to go for my ccnp switch in the next month without the use of dumps. And these practise things really help. Pretty frustrating that there are parts missing in the official LAB guide while still on the exam. These things help.

  22. Anonymous
    June 22nd, 2017

    Someone please send me the dumps latest ones, don’t want to fail again

    J d r i x @ outlook . Com

  23. mrbean
    June 22nd, 2017

    wallies, Switch A is configured as Active as you see my comment… on the lab it is mentioned that switch A controls the activation :)

    Active-Passive is the setup because they say that Switch A controls the activation… good luck with the exam! I’ve passed finally today!

  24. sauer
    June 23rd, 2017

    mr bean did you pass??!

  25. Bane
    June 23rd, 2017

    Hi mrbean!

    congrats! how was the exam?

    is the 376q valid? or the 262q?

    what are the labs?

    thank you!

    more certs to pass!

  26. Anonymous
    June 23rd, 2017

    My mrbean or anybody that did the exam… do you have to configure the following?

    SW-B(config)#ip default-gateway 192.168.1.1 (you can get this IP from SW-A with command show cdp neighbour detail) // not sure about this command because the question says “No routing is to be configured on SwitchB”.

    SW-B(config)#interface vlan 1
    SW-B(config-if)#ip address 192.168.1.11 255.255.255.0
    SW-B(config-if)#no shutdown
    SW-B(config-if)#exit

  27. mrbean
    June 23rd, 2017

    Hi Sauer and Bane!
    ye finally passed with 825 points :P I’ve made a big comment in the AAA Lab comments regarding the exam :P check that out… :)

    I’ve learned before the 262 and after the last 100 questions from 376 (the 376 is nothing else than the 262 + 110 new questions)…

    Evil god posted new questions on the AAA Lab, 401q… I believe that is updated and corrected (hopefully)…

    but only with the 376 you are almost good to go! :) just need a bit luck that you don’t get any new questions! :) @Bane, labs are the same as always.. HRSP, LACP/STP and AAA…

    @Anonymous, I’ve not configured the default gateway because it’s not requested. But it’s already configured on the switch…
    the inferface vlan 1 ist also already configured with the correct IP… but as it is requested on the initial Text… I’ve just configured it again over the existing config.. just to be sure that they don’t remove me points for not configuring it :)

    good luck all :)

  28. sauer
    June 23rd, 2017

    Congrats Mr bean!!, i am having test on monday, please help me with just some more doubts, the request about not configuring anything on physical interfaces in Etherchannel lab and no to use access list named in dot1x lab still current?

  29. mrbean
    June 23rd, 2017

    Hi Sauer, thanks :)

    on the LACP with STP you HAVE TO configure all on the physical interfaces… “inter range fa0/3 – 4”

    do not touch the port channel that will be created when configuring the physical interfaces…

    regarding the named lists: they are not working… so you have to use the normal command “access-list 10 permit 172.120.40.0 0.0.0.255”

    more easier in my opinion :) study well the 376q and the new drag and drops.. and you should be good to go :)

  30. Evil-God
    June 24th, 2017

    hey!!! everyone Ignore the 401q it’s somehow mix with CCIE

    for the CCNP 300-115, go with the 376q

    376q link below:
    https://www.dropbox.com/s/8tjr7ewuhu7stmi/RatedR_Cisco_300-115.vce?dl=0

  31. Evil-God
    June 24th, 2017

    tips on drag N drop!!
    802.1d = STP
    802.1s = MSTP
    802.1w = RSTP

  32. Evil-God
    June 24th, 2017

    Drag n drop

    link: read from 47 – 100

    http://vceguide.com/drag-and-drop-question-33/

  33. Evil-God
    June 24th, 2017

    install this VCE and apply the crack; so you can open the 376q

    https://yadi.sk/d/FCeHikt43KQqGH

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