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EVN & VRF Questions

August 24th, 2015 in ROUTE 300-101 Go to comments

Quick review:

Easy Virtual Network (EVN) is an IP-based network virtualization solution that helps enable network administrators to provide traffic separation and path isolation on a shared network infrastructure. EVN uses existing Virtual Route Forwarding (VRF)-Lite technology to:
+ Simplify Layer 3 network virtualization
+ Improve shared services support
+ Enhance management, troubleshooting, and usability

Question 1

Explanation

All the subinterfaces and associated EVNs have the same IP address assigned. In other words, a trunk interface is identified by the same IP address in different EVN contexts. EVN automatically generates subinterfaces for each EVN. For example, both Blue and Green VPN Routing and Forwarding (VRF) use the same IP address of 10.0.0.1 on their trunk interface:

vrf definition Blue
vnet tag 100
vrf definition Green
vnet tag 200
!
interface gigabitethernet0/0/0
vnet trunk
ip address 10.0.0.1 255.255.255.0

-> A is correct.

In fact answer B & C are not correct because each EVN has separate routing table and forwarding table.

Note: The combination of the VPN IP routing table and the associated VPN IP forwarding table is called a VPN routing and forwarding (VRF) instance.

Question 2

Explanation

EVN is supported on any interface that supports 802.1q encapsulation, for example, an Ethernet interface. Instead of adding a new field to carry the VNET tag in a packet, the VLAN ID field in 802.1q is repurposed to carry a VNET tag. The VNET tag uses the same position in the packet as a VLAN ID. On a trunk interface, the packet gets re-encapsulated with a VNET tag. Untagged packets carrying the VLAN ID are not EVN packets and could be transported over the same trunk interfaces.

Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/layer-3-vpns-l3vpn/whitepaper_c11-638769.html

Question 3

Explanation

An example of using “autonomous-system {autonomous-system-number}” command is shown below:

router eigrp 100
address-family ipv4 vrf Cust
net 192.168.12.0
autonomous-system 100
no auto-summary

This configuration is performed under the Provide Edge (PE) router to run EIGRP with a Customer Edge (CE) router. The “autonomous-system 100” command indicates that the EIGRP AS100 is running between PE & CE routers.

Question 4

Question 5

Question 6

Explanation

EVN builds on the existing IP-based virtualization mechanism known as VRF-Lite. EVN provides enhancements in path isolation, simplified configuration and management, and improved shared service support

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/evn/configuration/xe-3s/evn-xe-3s-book/evn-overview.html

Maybe the “improved shared services support” term here implies about the support of sharing between different VRFs (through route-target, MP-BGP)

Question 7

Explanation

This question is not clear because we have to configure a static route pointing to the global routing table while it stated that “all interfaces are in the same VRF”. But we should understand both outside and inside interfaces want to ping the loopback interface.

Question 8

Explanation

EVN supports IPv4, static routes, Open Shortest Path First version 2 (OSPFv2), and Enhanced Interior Gateway Routing Protocol (EIGRP) for unicast routing, and Protocol Independent Multicast (PIM) and Multicast Source Discovery Protocol (MSDP) for IPv4 Multicast routing. EVN also supports Cisco Express Forwarding (CEF) and Simple Network Management Protocol (SNMP).

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/evn/configuration/xe-3s/evn-xe-3s-book/evn-overview.html

Question 9

Explanation

Route-target is is tagged to each VPN when it is exported. In other words, when a prefix is exported with a route-target, an extended BGP community is attached to that prefix. If this community is matched with the (import) route-target of the receiving side then the prefix is imported to the receiving VRF.

Comments
  1. william
    February 25th, 2015

    Thanks Digital tut!

  2. Anonymous
    March 9th, 2015

    Uganda boy Museveni 7 did you pass?

  3. McKiche
    March 16th, 2015

    Thanks a lot digitaltut.I passed my route 300-101 exam on Sat.All questions are valid.The old exam materials are also valid.Thanks a bunch

  4. Me@here.com
    March 16th, 2015

    I only saw q1 in my test.

  5. nilia
    March 23rd, 2015

    passed 300-101 with 989 marks 82 dumps are 100 percent correct

  6. Vonnie
    March 30th, 2015

    What are the other two correct characteristics that are shared by subinterfaces and associated EVNs since the explanation is saying B&C are not correct?

  7. Anonymous
    April 8th, 2015

    Question.1
    verified
    the other two correct characteristics that are shared by subinterfaces and associated EVNs is the
    D. access control lists
    E. NetFlow configuration

  8. Run
    April 12th, 2015

    I think Q1 is correct, since the purpose of EVN is to remove the management overhead of a bunch of configuration on each sub interface dedicated to each VRF being created. Once you configure an EVN trunk between two routers they are sharing both the IP, RIB and FIB of that physical interface.(Sharing one IP, RIB, and FIB on each VRF instance but separated by tagging). :)

    http://www.cisco.com/c/dam/en/us/products/collateral/ios-nx-os-software/easy-virtual-network-evn/aag_c45-675118.pdf

    http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/layer-3-vpns-l3vpn/whitepaper_c11-638769.html

  9. Me
    April 15th, 2015

    I passed 300-101 yesterday with 1000. I had Q1 in my exam, and just so you know A B C is the answer :)

  10. Musa
    May 11th, 2015

    Q1 is ABC, see the explanation below:

    A trunk interface can carry traffic for multiple EVNs. To simplify the configuration process, all the subinterfaces and associated EVNs have the same IP address assigned. In other words, the trunk interface is identified by the same IP address in different EVN contexts. This is accomplished as a result of each EVN having a unique routing and forwarding table, thereby enabling support for overlapping IP addresses across multiple EVNs.
    Reference: http://www.cisco.com/en/US/docs/ios-xml/ios/evn/configuration/xe-3sg/evn- overview.pdf

  11. 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?

  12. HUH
    July 9th, 2015

    @Musa

    http://www.cisco.com/en/US/docs/ios-xml/ios/evn/configuration/xe-3sg/evn-overview.pdf

    “Single IP Address on Trunk Interface

    A trunk interface can carry traffic for multiple EVNs. To simplify the configuration process, all the subinterfaces and associated EVNs have the same IP address assigned. In other words, the trunk interface is identified by the same IP address in different EVN contexts. This is accomplished as a result of each EVN having a unique routing and forwarding table, thereby enabling support for overlapping IP addresses across multiple EVNs.”

    A. Definitely Correct
    B. Not correct
    C. Not correct
    D. ???
    E ???

  13. 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

  14. U
    July 26th, 2015

    Digitaltut did you have the old exam question also? I mean the exam befor 300-101

  15. gsandorx
    August 10th, 2015

    I believe Q1 –> ABC

    According to http://www.cisco.com/en/US/docs/ios-xml/ios/evn/configuration/xe-3sg/evn-overview.pdf , EVN trunk interfaces (where “subinterfaces” live) don’t support ACL, Netflow.

    I guess this question is asking about a conceptual view of things/features/characteristics shared by sub-interfaces and not whether they use the same IP routing table or same FIB. It’s more like:

    Which three characteristics are shared by human beings?

    1) brain
    2) hands
    3) heart
    4) wings
    5) fins

    Answer: 1, 2, 3

    .. but that doesn’t mean that we all use the same brain or hands or heart.

  16. Spelunker
    August 10th, 2015

    Questions are not showing up on this site. Only answers.

  17. MZ
    August 15th, 2015

    Q1 – I agree with gsandorx. The question meaning is probably “Which three characteristics ‘can be’ used by subinterfaces… “, not “Which three characteristics ‘are shared’ by subinterfaces… ” as in original question that is ambiguous.

  18. anonymousCCNPseeker
    August 22nd, 2015

    Spelunker, did you get a crisp answer about getting to the Questions? Not just the “explanations”? Anyone? bridgetedwards@msn.com

  19. anonymousCCNPseeker
    August 22nd, 2015

    I have a file of the delta questions between 82 and 116, if anyone needs those.

  20. testteaker
    September 20th, 2015

    My take on Q1
    The following are not supported on an EVN trunk:

    access control lists (ACLs)

    BGP interface commands are not inherited

    IPv6 (except that IPv6 is supported on vnet global)

    NAT

    NetFlow

    WCCP

    SO it has to be A,B and C

  21. Anand
    October 23rd, 2015

    The Answer is “A” only

    And here is why-

    Cant be “B” and “C” because
    “each with their own logical network and unique routing and forwarding tables.”

    Cant be “D” and “E” because
    Netflow and ACLs not supported by EVNs

    source for both the reasons-

    http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/evn/configuration/xe-3s/evn-xe-3s-book/evn-overview.html

  22. Anand
    October 23rd, 2015

    Correction to above submission @ Anand – October 23rd, 2015

    The Answer is A ofcourse and B and C as well because.
    “each with their own logical network and unique routing and forwarding tables.” but if you want you can have them share RIB & FIB like youy do in VRF for route replication

    So its A, B and C

    Source: https://networklessons.com/ip-routing/cisco-evn-easy-virtual-network/

    @digitaltut – please correct this in your answers

  23. Anonymous
    November 12th, 2015

    Can someone send me the latest 300-101 dumps please?
    My mail id is rpande5@uic.edu

  24. pablo
    November 25th, 2015

    Regarding question #1:

    Refer to this cisco documentation:
    http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/evn/configuration/xe-3s/evn-xe-3s-book/evn-overview.html

    which states explicitly:

    The following are not supported on an EVN trunk:
    Access control lists (ACLs) <—–
    BGP interface commands are not inherited
    IPv6, except on vnet global
    Network address translation (NAT)
    NetFlow <—-
    Web Cache Communication Protocol (WCCP)

  25. Henk
    December 16th, 2015

    Hello Guys,

    I have found myself learning for the ccnp route again. Apart from learning the actual exam I would like to point out that Chris Bryant does an excellent course with all the information needed.

    So do any of you use his material or people only looking for a quick pass on the exam these days?

  26. BK
    December 16th, 2015

    I went for the official course, hands on instructor, few months back. EVN/VRF were not even in the syllabus!!!

  27. Bug
    December 19th, 2015

    Why are all the questions missing?

  28. Anonymous
    January 5th, 2016

    friends,can anybody please send me the latest dump (after JAN,2016) for CCNP switch 300-115 & CCNP route(300-101),
    my mail ID: {email not allowed}
    I’m going to take exam on feb’ 2016.

  29. Gats
    February 18th, 2016

    Who has sat for the route exam in February 2016, are all materials in this forum up to date?

  30. Jonny
    July 26th, 2016

    I guess question 1 is asking about the characteristic/features shared.
    So it does not means that the physical routing/forwarding table share.

    Think the person who set this question want to test on the trunk interface, which was indirectly mentioned with sub-interfaces and inheritance? (my guess)

    Anyway this is what I think and I am still pursuing my CCNP :P

  31. hydra
    July 29th, 2016

    pls how get ques.

  32. cls
    August 13th, 2016

    Can anyone explain Q7 I am confused.

  33. NP`
    September 1st, 2016

    Q1 D, E – ACL and Netflow are not supported by EVN trunk, so also not supported by subinterface, then not supported status is shared from trunk to subinterfaces :-)

  34. Anonymous
    September 10th, 2016

    thank u digital tut

  35. kk
    September 19th, 2016

    thanks Fein

  36. Goofball
    October 4th, 2016

    Guys, 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???

  37. ok2
    October 11th, 2016

    I don’t see the questions anymore. what is going on?

  38. bdaboy22
    October 18th, 2016

    Can anyone verify Goofball’s comment? I have to re-certify my CCNP by the end of month.
    Tx

  39. QQ
    November 14th, 2016

    Everything you require to get ready and quickly pass the tough Cisco Certified Design Professional 300-101exam with 100% valid questions answers & pass guarantee in first attempt. http://www.grades4sure.com/300-101-exam-questions.html

  40. Anna
    November 17th, 2016

    I passed the written exam by scoring 90%. Most of the questions are from the http://www.testmayor.com dumps, though the sequences of choices are changed, so it is better to understand the concepts beforehand and go through the dumps so that you will not be surprised in the exam.

  41. J
    February 3rd, 2017

    Just took the 300-101 816/1000 used nothing but 149q and Tagwa 49. So here is what I saw on the test, but didn’t see in either of those study guides.

    1. IP SLA configuration and general knowledge
    2. Several PPPoE questions
    3. Numerous queries about NAT (time-range)

    Bottom line: If you have a clue plus know digitaltut, 149q and Tagwa 49 you will Pass!

    Good Luck Gents

  42. Anonymous
    February 5th, 2017

    Anyone know the answer to q1 for certain? At this URL, it notes that Netflow and ACLs are not supported on an EVN trunk. So that leaves us with answers A, B, and C. However, the answer given say taht answer B and C aren’t correct. So, wtf???

    https://www.cisco.com/en/US/docs/ios-xml/ios/evn/configuration/xe-3sg/evn-overview.pdf

  43. Martin
    February 6th, 2017

    @ J where did you get Tagwa 49? It seems I can’t find it anywhere. I only have 41.

  44. flyingtuvi
    February 7th, 2017

    Congrats J and thanks for sharing the dumps to focus on. I am taking 300-101 in 3 days and will let you know how I go. I have tagwa and 149q

  45. Anonymous
    February 18th, 2017
  46. mirzokhid
    February 28th, 2017

    hello everyone, can anyone share with me also tagwa. Please send to ahilles05 -dot- 94 @ gmail -dot- com. Thank you in advance.

  47. Anonymous
    March 8th, 2017

    Passed! used tut questions and free dumps from https://drive.google.com/open?id=0B5mAFqgydmCzTGd0VU9nQVZEaEE

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