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Lab Challenge 6 – Switch Config

January 5th, 2015 in Lab Challenge Go to comments

Let’s continue with Lab Challenge 6 with same topology as other switching lab challenges!

Here is the link to access this lab: http://www.rstut.com/final_flash/Four_Switches_Lab_6/Four_Switches_Lab_6.html.

Comments (21) Comments
  1. Route Professor
    January 7th, 2015

    ———-
    SPOILER
    ———-

    Here are the answers:
    1. track 1 ip route 8.8.8.0 255.255.255.0 reachability
    2. ip address 192.168.30.1 255.255.255.0
    3. standby 1 ip 192.168.30.254
    4. standby 1 priority 120
    5. standby 1 authentication md5 key-string rstut
    6. standby 1 preempt
    7. standby 1 timers 3 16
    8. standby 1 track 1 decrement 30
    9. udld port aggressive
    10. ip sla 1
    icmp-echo 1.1.1.1 source-ip 2.2.2.2
    frequency 300
    11. ip sla schedule 1 start-time now recurring

    Regarding 7, Standby will take active role a second after 5 hello packets (3×5=15). So, another possible solution, might be the following:
    standby 1 preempt delay minimum 6 (That is 10 seconds of holdtime plus 6 = 16)

    P.S: Great practice tests! Congratulations to the rstut team and thank you very much for sharing!

  2. ska
    January 15th, 2015

    this is a great help to remember commands!!!! many thanks to all of you, i’ve done all practices, and all were amazing!!!!

  3. RY
    January 20th, 2015

    thank a lot 🙂 this is really great

  4. TommyBoy
    January 25th, 2015

    Can anyone else not get item 11 to work?

  5. RodrigoM11
    January 25th, 2015

    RY, make sure in q10 you set the SLA instance number to 1. (IP SLA 1)

  6. RodrigoM11
    January 25th, 2015

    I ment TommyBoy 😀

  7. rstut
    January 26th, 2015

    @RodrigoM11: You can set any number that is in the range. No need to be number 1.

  8. TommyBoy
    January 26th, 2015

    @RodrigoM11 and rstut

    Thanks! My experience agrees with RodrigoM11. In Item10, the answer flags as correct if you input “ip sla” and nothing else, but then Item13 will not register as correct with any answer. However, when I change Item10 to “ip sla 1”, then Item13 registers as correct.

    Thanks all!

  9. TommyBoy
    January 26th, 2015

    @rstut

    These SIMs are great. Any more are welcome!

  10. rstut
    January 27th, 2015

    @TommyBoy: Item 13 needs to take the SLA number of Item 10 so you cannot do Item 13 before doing Item 10. It is also true in real device. But you can use any SLA number for Item 10 and 13, provided they are the same.

  11. TommyBoy
    January 27th, 2015

    @rstut

    My only observation is that Item 10 registers as correct with only “ip sla”. Maybe the answer should be incorrect until “ip sla 1” (or other integer) is input.

    Thank you for the response

  12. @arBANGALORE
    January 27th, 2015

    @Thank u RSTUT lab challenge 456 are awesome !!!!bravo expect more challenging labs in future

  13. me@here.com
    February 25th, 2015

    why 3 16 …..
    I mean…I get that 3 * 5 = 15 +1 (for a 1 second “hold)
    but really….where are you drawing a 3 second hello?

    nevermind….just found it: the default is 3 seconds.

    http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-1_8_ea1/configuration/guide/3550scg/Swhsrp.html

  14. Anonymous
    April 10th, 2015

    Hi Everyone,

    Anyone can explain me why in Item 8 (standby 1 track 1 decrement 30) is not possible to use a decrement of 50? Why has to be 30?

    If I am not wrong, the default priority in routers using HSRP is 100 and by default and the default decrement is 10.

    I tried with different numbers and only 30 works. Why?

    Thanks a lot.

  15. AC
    April 23rd, 2015

    x2 Anonymous
    im caught out on this one too..

    default decrement is 100 for routers participating in hsrp
    and default decrement is 10

    ideally any “decrement should work”..

  16. Gwen07
    July 24th, 2015

    @ Anonymous I did standby 1 track 1 decrement 21 and it worked.

    Anything greater that 20 but less that 31 will work:

    (21=30)

    This is because sw2 has a priority of 100 and since the priority of sw1 is configured as 120 then if it fails it should preempt to a value that will be lower than 100.(closest is 99) so if the decrement value is 21 then sw1 will have a priority of 120-21=99. 99 hasa lower priority than 100 therefore sw1 can become the active router again.

    Since the default priority on sw 2 is 100 so when switch 1 fails it should decrease its priority

  17. Gwen07
    July 24th, 2015

    Even though it is not indicated switch 2 has a decrement value of 10 which the default so if it becomes the active router and has a failure it will decrease its priority by 10 to 90

  18. Avi
    August 30th, 2015

    why wouldn’t the life forever work on the ip sla schedule?

  19. USFlanker
    September 2nd, 2015

    @rstut
    First of all thank you so much for these labs and the rest of the resources.
    Also thanks to Gwen07 for the explanation above.
    Regarding item 8 I understood…

    Sw2 should take over if the Sw1 tracked obeject is unreachable
    And
    Sw1 should retake the Active role when Sw2 also fails

    If we use “standby 1 track 1 decrement 30” on Sw1 and the tracked object fails (120 – 30 = 90). Since the question tell us “Sw2 has been configured completely with the default settings” let’s assume the track object on Sw2 also failed (100 – 10 = 90) then both Switches will have equal priorities. I believe if both priorities are equal (Sw1 = 90 & Sw2 = 90) the HSRP router with the highest IP address wins the election.

    Shouldn’t the decrement of the acceptable answers range from 21 to 29?

    Anyone please correct me if I misunderstood…
    Thanks

  20. Tweety
    September 7th, 2015

    Thanks to rstut!
    This type of studying is the best for refreshment on commands that you dont use everyday!
    Keep up the good work!

  21. anoynmouse
    October 7th, 2016

    what language and software is used to make this? I checked it was macromedia and what else any idea?

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