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DMVPN Questions

September 6th, 2015 in ROUTE 300-101 Go to comments

Note: If you are not sure about DMVPN, please read our DMVPN tutorial first.

Question 1

Explanation

From the output we learn that the logical address 10.2.1.2 is mapped to the NBMA address 10.12.1.2. Type “dynamic” means NBMA address was obtained from NHRP Request packet. Type “static” means NBMA address is statically configured. The “authoritative” flag means that the NHRP information was obtained from the Next Hop Server (NHS).

Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_4/ip_addr/configuration/guide/hadnhrp.html

Question 2

Explanation

When DMVPN tunnels flap, check the neighborship between the routers as issues with neighborship formation between routers may cause the DMVPN tunnel to flap. In order to resolve this problem, make sure the neighborship between the routers is always up.

Reference: http://www.cisco.com/c/en/us/support/docs/security-vpn/ipsec-negotiation-ike-protocols/29240-dcmvpn.html#Prblm1

Question 3

Explanation

DMVPN is not a protocol, it is the combination of the following technologies:

+ Multipoint GRE (mGRE)
+ Next-Hop Resolution Protocol (NHRP)
+ Dynamic Routing Protocol (EIGRP, RIP, OSPF, BGP…) (optional)
+ Dynamic IPsec encryption (optional)
+ Cisco Express Forwarding (CEF)

For more information about DMVPN, please read our DMVPN tutorial.

Question 4

Explanation

To allow communication to multiple sites using only one tunnel interface, we need to configure that tunnel in “multipoint” mode. Otherwise we have to create many tunnel interfaces, each can only communicate to one site.

DMVPN_Topo_mGRE.jpg

 

Question 5

Explanation

An mGRE tunnel inherits the concept of a classic GRE tunnel but an mGRE tunnel does not require a unique tunnel interface for each connection between Hub and spoke like traditional GRE. One mGRE can handle multiple GRE tunnels at the other ends. Unlike classic GRE tunnels, the tunnel destination for a mGRE tunnel does not have to be configured; and all tunnels on Spokes connecting to mGRE interface of the Hub can use the same subnet.

DMVPN_Topo_mGRE.jpg

For more information about DMVPN, please read our DMVPN tutorial.

Question 6

Explanation

GRE tunnels are the first thing we have to configure to create a DMVPN network so we should start troubleshooting from there. NHRP can only work properly with operating GRE tunnels.

Question 7

Comments
  1. Dereje
    February 24th, 2015

    Excellent Work!

  2. Muhammad
    February 27th, 2015

    Very nice explanation.

  3. dj
    March 3rd, 2015

    thanks!…

  4. Ralph
    March 10th, 2015

    Hi everyone,

    Are DMVPN Questions in new CCNP Route 642-902?

    Thanks!

  5. Essam Ahmad
    March 19th, 2015

    @Ralph:

    CCNP 642-902 exam doesn’t exist any more since 31-Jan-2015
    You must study and take the new 300-101 exam.

    Good Luck!

  6. Prabhu
    April 5th, 2015

    Good explanation… Thanks

  7. Maher
    April 13th, 2015

    DIGITALTUT: THEY ARE THE BEST

  8. Anonymous
    April 21st, 2015

    thanks

  9. BMW
    April 29th, 2015

    A lot of very useful information, many thanks the TEAM of Digtal tut!!!

  10. help
    May 12th, 2015

    please support:
    only have to study 300-101
    no 642-902 ?

    then why material of 642-902 on this digitaltut ?

  11. PS
    June 13th, 2015

    300-101 exam is wider then 642-902 thereforeI understand we need known all from both exams.

  12. guru
    June 22nd, 2015

    @Administrators.. why are you adding 642-902 exercises here when we should be focusing on 300-101? if its still needed for route exam please tell me

  13. ndze frank
    June 30th, 2015

    any body please send me latest dumps to frank.bang@yahoo.com

  14. Nthgimp
    July 1st, 2015

    Hi all,
    I am planning do my CCNP route exam on coming Saturday any one please update me for exam purpose is it enough to work out the 301-101 questions from digitault?

  15. OK
    July 2nd, 2015

    Yeah if you go through all the questions and labs you should be good.I have mine next week as well.Best of LUCK

  16. Jason
    July 8th, 2015

    Hi guys,

    please help me to find where to download ccnp 300-101 dumps.
    and also vce for windows or vce for android.

    appreciated your help guyz.
    thank you

  17. ndze frank
    July 9th, 2015

    any body please send me latest dumps to frank.bang@yahoo.com

  18. digitaltut
    July 24th, 2015

    @all: Because of copyrighted issue, we had to remove all the questions and answers. We can only keep the explanations. You can download all the questions and answers at: https://mega.co.nz/#!0pUxSZoJ!s293gEdQu4xLndoA7zZTq5ldia3gdZlrZqNxc_AgpFc
    or
    http://www.4shared.com/office/-GBRNxjKce/ROUTE_July_2015.html

  19. Anonymous
    July 24th, 2015

    @digitatut
    Can you add word version to file for downloading? We may need copy/paste the topology diagram to the file. Thank you.

  20. Anonymous
    July 24th, 2015

    @digitaltut
    Also can you still provide 642-902 questions for study purpose ? I know currently we use 300-101. Thank you.

  21. mhkim
    July 27th, 2015

    Need latest CCNP dumps pdf
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  22. TBD
    July 28th, 2015

    !!!! all the question in the exam changed!!!!
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  23. xyz
    July 28th, 2015

    when can I expect latest dumps?My exam in mid Aug

  24. Chuck
    July 30th, 2015

    i can only see the Explanation – how come the Questions are not posted?

  25. digitaltut
    July 31st, 2015

    @Chuck: Because of copyrighted issue, we had to remove all the questions and answers. We can only keep the explanations. You can download all the questions and answers at: https://mega.co.nz/#!0pUxSZoJ!s293gEdQu4xLndoA7zZTq5ldia3gdZlrZqNxc_AgpFc
    or
    http://www.4shared.com/office/-GBRNxjKce/ROUTE_July_2015.html

  26. gds
    August 3rd, 2015

    WHERE ARE THE QUESTIONS???????

  27. CCNARAEL
    August 6th, 2015

    administrator; where I can download the questions ?

  28. zahid
    August 9th, 2015

    Where are the questions ?

  29. scroll up and be happy
    August 10th, 2015

    @gds; @CCNARAEL; @zahid

    digitaltut July 24th, 2015
    @all: Because of copyrighted issue, we had to remove all the questions and answers. We can only keep the explanations. You can download all the questions and answers at: https://mega.co.nz/#!0pUxSZoJ!s293gEdQu4xLndoA7zZTq5ldia3gdZlrZqNxc_AgpFc
    or
    http://www.4shared.com/office/-GBRNxjKce/ROUTE_July_2015.html

  30. Batman
    September 1st, 2015

    Hi, where are the actual questins? I see the explanations to the questions but dont see the actual questions? What am I missing?
    Thanks.

  31. Batman
    September 1st, 2015

    Oops, now I see Aug 10 comments. Now I wish I could delete a comment!

  32. osa
    September 3rd, 2015

    thanks, but what are the questions?

  33. Sabinay
    September 27th, 2015

    @ Digitaltut, the two links ” https://mega.co.nz/#!0pUxSZoJ!s293gEdQu4xLndoA7zZTq5ldia3gdZlrZqNxc_AgpFc
    or
    http://www.4shared.com/office/-GBRNxjKce/ROUTE_July_2015.html” doesn’t contain all question of Ip services, BGP and gre tunnel,can u update ur pdf please.

  34. digitaltut
    September 27th, 2015

    Please use this link to see newest PDF file: http://www.digitaltut.com/route-questions-and-answers

  35. Sabinay
    September 28th, 2015

    @ digitaltut, Thanks a lot….

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    October 14th, 2015

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    Rush a clear it as well because cisco will soon update question if guys start scoring high in such a short time.

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    November 12th, 2015

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    November 16th, 2015

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    January 16th, 2016

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    February 15th, 2016

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  44. Ahaf
    April 1st, 2016

    Digitaltut, please correct the flash based questions for this theme on question “Which common issue causes intermittent DMVPN tunnel flaps?” I choose the correct answer “interface bandwidth congestion”, but your system allways choose the incorrect “a routing neighbor reachability issue” when I view the review. Is this mistake made intentonally?

  45. digitaltut
    April 2nd, 2016

    @Ahaf: The answer should be “a routing neighbor reachability issue”.

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    April 24th, 2016

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    May 1st, 2016

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    May 20th, 2016

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    May 20th, 2016

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    May 28th, 2016

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    July 18th, 2016

    Got full marks in the 300-101. Thanks pass4surekey http://pass4surekey.com/exam/300-101.html

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    September 4th, 2016

    If someone has the latest pdf dumps please send it to me.
    info at anemosradio.com
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  54. Hit me
    October 4th, 2016

    I failed today with a 640. The ‘300-101: Implementing Cisco IP Routing’ exam is completely different then what is on this site. Not even close. There are maybe 10 questions that are the same… What happened???

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    October 9th, 2016

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    October 25th, 2016

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    November 5th, 2016

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    November 7th, 2016

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    November 17th, 2016

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    November 30th, 2016

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  66. mourad
    December 2nd, 2016

    Q1: i The “authoritative” flag means that the NHS has learned about the NHRP mapping directly from a registration request (the NHS “serves” the particular NHC).
    i think the right respponse would be D

  67. Anonymous
    December 5th, 2016

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  68. The Grinch
    December 12th, 2016

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    The link below is the ebay matierlas I have utilized, if you would like to use as well:

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    December 17th, 2016

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  70. danny
    December 18th, 2016

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    January 9th, 2017

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    January 15th, 2017

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    January 31st, 2017

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  74. ExamOnFeb21st2017
    February 17th, 2017

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    February 18th, 2017

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    March 24th, 2017

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    March 24th, 2017

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    March 24th, 2017

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