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GRE Multilink Sim

September 11th, 2017 Go to comments

Refer to the topology below and answer the following questions.

Topology.jpg

Note: There may be different faults in this sim so please notice the following faults:

1. ACL blocking traffic on interface between R2 and R3
2. The network was not advertised in EIGRP
3. Two routers couldn’t establish adjacency because of ACL
4. Another two routers couldn’t establish adjacency because of wrong IP configuration on interface between them

Question 1

Explanation

The Branch2 network is communicating to the Server farm, which is connected to R2, via GRE Tunnel so we should check the GRE tunnel first to see if it is in “up/up” state with the “show ip interface brief” command on the two routers.

On Branch2:

Branch2_show_ip_interface_brief.jpg

On R2:

R2_show_ip_interface_brief.jpg

We see interfaces Tunnel0 at two ends are “up/up” which are good so we should check for the routing part on two routers with the “show running-config” command and pay attention to the static routing of each router. On Branch2 we see:

R2_show_run_static.jpg

The destination IP address for this static route is not correct. It should be 192.168.24.1 (Tunnel0’s IP address of R2), not 192.168.24.10 -> Answer C is correct.

Note: You can use the “show ip route” command to check the routing configuration on each router but if the destination is not reachable (for example: we configure “ip route 10.10.10.0 255.255.255.0 192.168.24.10” on Branch2, but if 192.168.24.10 is unknown then Branch2 router will not display this routing entry in its routing table.

Note: The IP address or configuration may be different in the exam.

Question 2

Explanation

First we should check Branch3 (and R1) with the “show ip interface brief” command to find any Layer1/Layer 2 issue.

Branch3_show_ip_interface_brief.jpg

We see the interfaces connecting between them are in “up/down” states which indicates an Layer 2 issue so we should check the configuration of these interfaces carefully with the “show running-config” command and pay attention to these interfaces.

R1_show_run_interface.jpg

and on Branch3:

Branch3_show_run_interface.jpg

We learn from above config is R1 is using CHAP to authenticate Branch3 router (via the “ppp authentication chap” command on R1). Branch3 router is sending CHAP hostname “Branch_3” and CHAP password “Branch3_Secret!” to R1 to be authenticated. Therefore we should check if R1 has already been configured with such username and password or not with the “show running-config” command on R1:

R1_show_run_username.jpg

On R1 we see the configured username is “Branch3”, not “Branch_3” so the usernames here are mismatched and this is the problem -> Answer A is correct.

Question 3

Explanation

In this question we have to check each option to see if it is correct. When we check Branch3 router we notice that “network 192.168.10.0” command is missing under “router eigrp 100” -> Answer D is correct.

Branch3_show_run_eigrp.jpg

Note: In the exam you should check other config as well. There are some reports saying that the answer of this question is different in the exam (answer A).

Question 4

Explanation

This question clearly stated there is a WAN connectivity issue between R1 and Branch1 so we should check both of them with the “show ip interface brief” command. On R1:

R1_show_ip_interface_brief.jpg

On Branch1:

Branch1_show_ip_interface_brief.jpg

We can see that although the Multilink1 interfaces are in “up/up” state but they are not in the same subnet. According to the IP address scheme shown on the topology we can deduce the Multilink interface on Branch1 has been misconfigured, it should be 192.168.14.2 instead.

Note:

The configs and answers in the exam may be different as a candidate on our site said:

“1- Why did Branch1 router lose WAN connectivity with R1 router?
The answer here was IP misconfigured but in the exam the problem was in multilink group
2 – Which statement about the router configurations is correct?
The answer here was The Branch3 LAW network 192.168.10.0/24 is not advertised into the EIGRP network but in the exam the right was that PPP PAP authentication between them”

So please grasp the concept behind each question well and check all the configuration carefully.

Comments (16) Comments
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  1. mizii
    November 23rd, 2018

    Hello guys, who have this lab in packet tracer ?

  2. wonderskid
    November 30th, 2018

    Passed. There was a few drag and drops I did not see in the dumps. Gre multilink sim came up but I picked different answers as the configuration seemed different. Ospf , and Eirgp sim were the same. There were three questions about where to place a standard or extended acl. You are shown a picture with a network and asked what router and what interface would you place the acl.
    I spent a lot of time on the sims and had less than a minute left when I finished the exam , I rushed the last 15 questions. good luck.

  3. Deus
    December 7th, 2018

    @Wonderskid how many sims were in your exam? Am taking mine next week. I need more clarity about that ACL question.

  4. wonderskid
    December 9th, 2018

    @Deus. I think i had three sims. regarding the Acl , KNow where to put a standard Acl and know where to put an extended acl.

    Standard near the destination; Extended near the source.

    you will be shown a diagram of a network , maybe three routers a few pcs. and asked ” where would you put a standard ACL to stop Pc a from connected to PC e? ”

    So I would put it on the router near the source. ,if the question mentions an extended ACL, then you place it near the destination..as in PC e in this case.

  5. Deus
    December 13th, 2018

    Thanks @ Wonderskid, i did the paper though i failed it. Most of these labs were there including this one. Could you help me with the dump that you read. I think some of the objectives failed me. This is my email deus dot kwitonda at gmail dot com.

  6. Anonymous
    December 25th, 2018

    PLAESE SEND DUMP at guede . kyliann @ gmail . com

  7. Alexandria Fogarty
    December 29th, 2018

    Hmm it appears like your website ate my first comment (it was extremely
    long) so I guess I’ll just sum it up what I wrote and say, I’m thoroughly
    enjoying your blog. I too am an aspiring blog blogger but I’m still new to everything.
    Do you have any suggestions for inexperienced blog writers?
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  8. HELP
    January 18th, 2019

    I am planing to take CCNA exams soon. Can you help me with CCNA dumps please
    E: msbtechsolution @ gmail . com

  9. Wilson
    January 24th, 2019

    wonderskid can u please help with dumps u use or can anyone help with a recent dumps please
    dohtitanwa @ G mail dot com. please help me

  10. Anonymous
    January 25th, 2019

    Took the exam today and luckily got passed. I got this one on 5 lab sims… Thanks a lot 9tut, its very helpful…

  11. Lorena
    January 26th, 2019

    Hello Anonymous,
    Could you please tell me which others lab did you find on exam?.
    Thanks.

  12. Anonymous
    February 5th, 2019

    I passed Jan 31st and laba were Vlans,eigrp ts sim,gre multilink,ospf ts ,dhcp ts, D&D TCP AND BGP.All from 9tut.Good luck every one.

  13. Robert
    February 5th, 2019

    Hello friends, my exam is February 8 th. Do somebody know is the labs and Dumb continue to be the same?
    Thanks

  14. VIma
    February 7th, 2019

    Question 1
    Why is the Branch2 network 10.10.20.0/24 unable to communicate with the Server farm 1 network 10.10.10.0/24 over the GRE tunnel?
    A. The GRE tunnel destination is not configured on the R2 router.
    B. The GRE tunnel destination is not configured on the Branch2 router.
    C. The static route points to the tunnel0 interface that is misconfigured on the Branch2 router. D. The static route points to the tunnel0 interface that is misconfigured on the R2 router.
    Answer: C
    Question 2
    Why has the Branch3 router lost connectivity with R1? Use only show commands to troubleshoot because usage of the debug command is restricted on the Branch3 and R1 routers?
    A. A PPP chap hostname mismatch is noticed between Branch3 and R1.
    B. A PPP chap password mismatch is noticed between Branch3 and R1.
    C. PPP encapsulation is not configured on Branch3.
    D. The PPP chap hostname and PPP chap password commands are missing on the Branch3 router.
    Answer: A
    Question 3
    Which statement about the router configurations is correct?
    A. PPP PAP is authentication configured between Branch2 and R1.
    B. Tunnel keepalives are not configured for the tunnel0 interface on Branch2 and R2.
    C. The Branch2 LAN network 192.168.11.0/24 is not advertised into the EIGRP network.
    D. The Branch3 LAN network 192.168.10.0/24 is not advertised into the EIGRP network. E. PPP CHAP is authentication configured between Branch1 and R1.
    Answer: D
    Question 4
    Why did Branch1 router lose WAN connectivity with R1 router?
    A. The IP address is misconfigured on PPP multilink interface on the Branch1 router.
    B. The PPP multilink group is misconfigured on the Branch1 serial interfaces.
    C. The PPP multilink group is misconfigured on the R1 serial interfaces.
    D. The Branch1 serial interfaces are placed in a shutdown condition.
    Answer: A

  15. VCE PLAYER LASTES VERSİON
    February 19th, 2019

    does anyone has last of VCE exam simulation setup with crack ???? could you send me mail please..

    halilalban at outlook dat com

  16. bill
    February 24th, 2019

    Robert,how did exam go??

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