IPv6 OSPF Virtual Link Sim
Question
Acme is a small export company that has an existing enterprise network that is running IPv6 OSPFv3. Currently OSPF is configured on all routers. However, R4′s loopback address (FEC0:4:4) cannot be seen in R1′s IPv6 routing table. You are tasked with identifying the cause of this fault and implementing the needed corrective actions that uses OSPF features and does no change the current area assignments. You will know that you have corrected the fault when R4′s loopback address (FEC0:4:4) can be seen in the routing table of R1.

Special Note: To gain the maximum number of points you must remove all incorrect or unneeded configuration statements related to this issue.
Answer and Explanation:
To troubleshoot the problem, first issue the show running-config on all of 4 routers. Pay more attention to the outputs of routers R2 and R3
The output of the “show running-config” command of R2:

The output of the “show running-config” command of R3:

We knew that all areas in an Open Shortest Path First (OSPF) autonomous system must be physically connected to the backbone area (Area 0). In some cases, where this is not possible,we can use a virtual link to connect to the backbone through a non-backbone area. The area through which you configure the virtual link is known as a transit area. In this case, the area 11 will become the transit area. Therefore, routers R2 and R3 must be configured with the area area-id virtual-link neighbor-router-id command.
+ Configure virtual link on R2 (from the first output above, we learned that the OSPF process ID of R2 is 1):
R2>enable
R2#configure terminal
R2(config)#ipv6 router ospf 1
R2(config-rtr)#area 11 virtual-link 3.3.3.3
(Notice that we have to use neighbor router-id 3.3.3.3, not R2′s router-id 2.2.2.2)
+ Configure virtual link on R3 (from the second output above, we learned that the OSPF process ID of R3 is 1 and we have to disable the wrong configuration of “area 54 virtual-link 4.4.4.4″):
R3>enable
R3#configure terminal
R3(config)#ipv6 router ospf 1
R3(config-rtr)#no area 54 virtual-link 4.4.4.4
R3(config-rtr)#area 11 virtual-link 2.2.2.2
We should check the configuration on R4:
R4>enable
R4#show running-config
You will see a wrongly configured virtual-link command. To get full mark we have to disable this command:
R4#configure terminal
R4(config)#ipv6 router ospf 1
R4(config-rtr)#no area 54 virtual-link 3.3.3.3
After finishing the configuration don’t forget to ping between R1 and R4 to make sure they work well!
Now all the configuration was done. It is weird that we can’t ping the IPv6 loopback interface of R4 (with the ping or ping ipv6 command) but we can check by using the command show ipv6 route on R1
The copying running-config startup-config command will not work but don’t worry, just skip it.
Notice: If you issue the command “show running-config” on R1, you will see these two lines:
passive-interface default
no passive-interface fa0/0 (fa0/0 is the interface connecting with R2)
These two lines make all the interfaces of R1 become passive interfaces except interface fa0/0. They are correctly configured so don’t try to disable them.
Other lab-sims on this site:
EIGRP Simlet
Policy Based Routing Sim
I got this lab- scored 100% only for the above bloggers.
Its absolutely correct in this site.
Conclude with “sh ipv6 route” in R1
At the end of the output you will find
FEC0:4:4/128 (the loopback address of R4). THATS ALL
DONOT DO ANYTHING ELSE. Like checking ipv6 routes in R4 for R1 loopback address. That will not appear. BE COOL & HAVE FAITH IN DIGITATTUT. At the end you will say OHH
Yep i confirm the above SIM & the solution is 100% correct. Claps for digitattut :) Go and take the exam and blindly type the soultion given above its correct.
@Ukk: Don’t type blindly.. Try to think also.. The purpose is that you learn something. Not that you only know a few commands.
So if you study hard, practice a lot and take a look at this site so you know what to expect.
@ Gerer
What i mean to say type blindly is just that the solution mentioned above is 100% correct. Now how i know that this solution is correct?
Offcourse i learned & studied a lot and most of all i practically solved this SIM :)
ukk It’s people like you who guarantee people like me a job. Type blindly all you wish – you may earn a certification, but you’ll never pass a tech interview.
Gerer I know what you intended to say folks there is no need to turn this site into a mplace of insults I am just glad folks are willing to share their knowledge.
Please don’t type it blindly. Understand the concept behind, it is the spirit of this site.
@digitaltut
Just wanna to ask how to upload or download for sim in this site. Coz i wanna to share my created lab in packet tracer. But that pkt file are totally reference from the guide line of this site. Just only wanna share to others.
I planned to take exam middle of this month. I passed already Tshoot . But now i’m not so clear for Route exam that what & how i should prepare. can u help me ?
thanks
why R2 and R3 and R4 configures virtual virtual-link
we use ospfv2, only R2 and R4 configures virtual-link
who can tell me
thanks
@Aric
on R4 we only issue NO area54 virtual-link 3.3.3.3
because that is the purpose error in the sim and to score more points you should correct it
Pls can someone send the latest dumps CCNP 642-902 to my e-maill address: abosunday@yahoo.com
Thanks
Hi Guys
I am preping for my MPLS 642-611 exam. Can someone please point me to the right directions for dumps / labs. I have old dumps but i have no idea how exam labs looks like. Any help will be great.
Thanks.
Just passed my 642-902 route exam with 944 points.
Thanks passguide 337….and digitalgut.com. Its very helpful!!!!
Before you enter the above commands, do you need to do anything else? For example, do you need to enter sh run then record anything? Or do you just enter the above commands?
Thanks!
My apologies – please ignore the last question. Thanks!
can someone send me the latestsend 642-902 exam upadate.thank you
can any one tell me how can i download this lab / sim
plzzzzzz help me
I really use this post. thanks.
I have made all of the 642-902 Test sims in a GNS3 format, just email if you want a copy at cciersbound@yahoo.com
Later,
CCIERSBound
today i pass with 933 marks every thing here is valid
Thanxxxxxxxxxxxxx
Digital tut
Again, thanks to cciersbound for creating the labs.
I am going through each one and testing at the moment, then mirroring so they don’t get lost!
Other than needing to add R4′s loopback in to the OSPF process, this one seems fine.
You can grab the files from http://cisco-revision.com/?p=181
Good luck!
Adam
http://www.cisco-revision.com
@ Adam
Agreed thanks heaps cciersbound for creating the labs, and thanks to you for picking up that omission
@Adam
Wonderful. That’s for your valuable suggestion.
@Adam
Thanks.
@Adam
Thank you very much
Once final suggestion regarding the GNS lab (to add to what Adam said) would be to also add the R1 loopback into the GNS process in order to enable normal (non-extended) pings…just to be ultra-pedantic :)
Hi Digitaltut, i used in my GNS3 lab the one that is dowloadable in http://cisco-revision.com/wp-content/uploads/2010/12/ipv6_ospf_gns3.zip
i cannot see from R1 the router from R4 until i type this command on R4′s lo0 interface
ipv6 ospf 1 area 54
and to see the route of R1′s lo0 interface from R4. I need to type this command on R1′s lo0 interface (which is optional based on the question)
ipv6 ospf 1 area 0
I just need to know of this is necessary…
Thanks
please people.. answer my question. i will take my route exam on dec.10.
thanks people.. =)
hi all
i have passed yesterday with score 966/ 1000
the passguide 3.37 is valid with 95 %
thank to digital tut and to everybody
this site is really great
@Dien
In GNS3 Lab IPV6 OSPF Virt Link Sim i typed :
ipv6 ospf 1 area xx
for every loopbacks on those routers, and work!
i have one question why we remove v-link of area 54 .
Hello
Friends learn this simulation in GNS3 at http://www.youtube.com/watch?v=EGmNYrzCh5s
That will help you to understand the assignment of the IPV6 address and the virtual links
Thanks
Muhammad Imran
MCP,MCTS,MCITP,CCNA,CCNP
Dear all,
Are you sure that we only type “no area 54 virtual-link 3.3.3.3″ at router 4?
should not we type “area 54 virtual-link 2.2.2.2″ so router 4 known as directly connected also?
Thank you in advance
ups, sorry, i thought that router 4 is an ABR. :D
in the test, OSPF Sim LAB was “192.168.19.4″ NOT 192.168.4.5/30 & 192.168.19.3/30
I can’t see R4 Lo 0 in the R1 ipv6 routing table. So weird! I used GNS3 sim from CCIERSbound.
Here is R1 routing table.
L FE80::/10 [0/0]
via ::, Null0
C FEC0::/28 [0/0]
via ::, Loopback0
L FEC0:1::1/128 [0/0]
via ::, Loopback0
OI FEC0:2::2/128 [110/10]
via FE80::C207:15FF:FE80:0, FastEthernet0/0
OI FEC0:3::3/128 [110/74]
via FE80::C207:15FF:FE80:0, FastEthernet0/0
L FF00::/8 [0/0]
via ::, Null0
Please advise.
Follow Dien’s advise as in above comments..
You got to add loopback 1 in ospf area 1.
@Andy Lau,
Small correction, you got to add Loopback 0 of R4 under ospf 1.
Sorry for typo.
@walnut, thank you.
But do we need to put Lo interface to ospf in exam?
can Anyone help?
@walnut,
what you telling is correct, but i wonder this is not done in real exam question or not?
if you took your route exan in 2011 pls let me lnow what sims or labs where on exam plsssssssssssssss. How man labs are in exam
Please me guys I’m preparing for my routing and switching and I don’t have any anything to
practice with. Can anyone please send BOSSON key to me. And also what is the minumum
RAM capacity that GNS3 works with. Help me out please. oluwapamilerin22@yahoo.com,
oluwapamilerin22@gmail.com. Thanks.
Dynagen management console for Dynamips (adapted for GNS3)
Copyright (c) 2008-2010 GNS3 Project
=> Local IOS image C:\Program Files\GNS3\IOS Images\c2691-adventerprisek9-mz.124-5a.image cannot be found for hypervisor 127.0.0.1:7200, use image C:\Users\System Admin\Documents\CISCO_IOS\C2691-AD.BIN instead
*** Warning: received dynamips server error:
203-Bad number of parameters (1 with min/max=2/2)
*** Warning: received dynamips server error:
203-Bad number of parameters (1 with min/max=2/2)
*** Warning: received dynamips server error:
203-Bad number of parameters (1 with min/max=2/2)
*** Warning: received dynamips server error:
203-Bad number of parameters (1 with min/max=2/2)
*** Error: errors during loading of the topology file, please correct them
Sorry i tried to load the above lab using gns3 n got the following error………any suggestions please….my exams is in a few weeeks
thanks all
hi friend can i downlaod lab for ccnp on gns3 plssssssssss help me
thank you for digitaltut.com
post your email address to dwrica@yahoo.co.uk and i will send you the lab.
Thanks to CCIERSBound for all the lab in GNS3 and digitut admins
my exams is in few weeks time……God help us
wish u all the best
Linking an area that does not have a physical connection to the backbone..2. 3 .. .Make a Virtual Link between Radia and Yakov.on the Radia ..area 1 virtual-link 131.252.215.81 yakov ..on the Yakov..area 1 virtual-link 131.252.215.49 yakov ..Show the virtual link information..show ip ospf virtual-link…RADIA.—–..radia config t.radia config router ospf 100 .radia config-router area 1 virtual-link 131.252.215.81.radia sh ip ospf virtual-linkVirtual Link OSPF VL1 to router 131.252.215.81 is up. Hello due in 00 00 07.radia exit…Yakov.—–..yakov config router ospf 100.yakov config-router area 1 virtual-link 131.252.215.49…yakov sh ip ospf virtual-link.Virtual Link OSPF VL1 to router 131.252.215.49 is up.
I seldom leave comments on blog, but I have been to this post which was recommend by my friend, lots of valuable details, thanks again.
@surajit
“You said”
“Conclude with “sh ipv6 route” in R1
At the end of the output you will find
FEC0:4:4/128 (the loopback address of R4). THATS ALL”
I dont see FEC0:4:4/128 in the show ipv6 route on R1
i only see R 2 and 3
OI FEC0:2::2/128 [110/10]
via FE80::C202:2FF:FE1C:0, FastEthernet0/0
OI FEC0:3::3/128 [110/74]
via FE80::C202:2FF:FE1C:0, FastEthernet0/0
Can someone explain?
oh never mind,
i found Dien’s advise its correct
thanks didtut
Can some one give me or share GNS3 file for that . my email is tanh123@hotmail.com
Thank you very much in advance.
@Batman
I had the same issue in this lab using GNS3.
In order to see the loopback interfaces in the routing table of R1 and R4, you have to add the loopback interfaces in the ospfv3 process in both routers, so
R1(config)# Interface Loopback0
R1(config-if)# ipv6 ospf 1 area 0
R4(config)# Interface Loopback0
R4(config-if)# ipv6 ospf 1 area 54
Manuel:
I added the following entries to the .CFG files that I downloaded from cisco revision. This way I am able to continue practicing the sim and the routes appearing in the routing table after the virtual links are created — which I believe to be at the root of this sim.
If someone would be kind enough to confirm, I believe the addition below is not required for the exam…Thanks
R1(config)# Interface Loopback0
R1(config-if)# ipv6 ospf 1 area 0
R4(config)# Interface Loopback0
R4(config-if)# ipv6 ospf 1 area 54
Hi. I assume from the initial comments in this thread that in the exam the loopback for R4 is already configured to be in the ipv6 ospf 1 routing process on R4, and we dont need to add it? Thanks
Plesae refer Diagram diag virtual2.ps…Virtual link exercise 2. ….Goal. ..OSPF has a heirarchy for routing packets to destinations that are intraarea .means within area and those are inter-area means between area. All.packets within a area should remain in an area and packets to other area.must pass through bacbone area. Even if two area connect to one router if.that router is not a backbone router the packets must be routed to backbone.router to be forwarded to other area.
someone please tell me how can I practice/download the Lab Sims before I sit for the real exam recently…eagerly waiting for a reply
Thanks in advance
are these labs still valid??how many labs do come in exam?
In my exam today R4 had virtual link statement which s not needed.
Had exam today…Thanks God I cleared it 976/1000. I have posted something in route exam experience….
Hi shz,
I m going to take up the exam on this Friday which dump u read ..? Could you please share the dump to my mail id senbagaram@gmail.com. please do the needful.
I hereby confirm that:
R1(config)# Interface Loopback0
R1(config-if)# ipv6 ospf 1 area 0
R4(config)# Interface Loopback0
R4(config-if)# ipv6 ospf 1 area 54
is needed for the GNS3 lab .
on 18/03/2011 I will say to you if it’s required in the exam too. : )
Yes Yes What You Or We Do this the Life
Just kilt it 3/30/2011. This was on people shook me a lill not used to see ipv6 routing table
BE CAREFUL
THE SIMULATOR SOFTWARE IS NOT SHOWING PERFECT RESULT………
WHAT I FACED IN THE EXAM THAT AFTER COMPLETION OF ALL CONFIGURATION …
R1 GOT THE ROUTE FOR LOOP BACK OF R4 BUT THE REVERSE I.E R4 DOES NOT GOT THE R1′S LOOP-BACK…..
DON’T GET NERVOUS………. IT IS ONLY THE LIMITATION OF THE SOFTWARE ………….
I GOT 100% FOR THIS LAB YESTERDAY.
GOOD LUCK FOR THOSE WHO WILL APPEAR SOON.
What I Will Do My Exam after 2 Huors and 60 Menit and 60 Secand
Hellllllllllllllllllllllllp
Congratulations For Me add alst a Pass the Exam
Bout I take 883
but Be careful the LAP Area OSPF Stub
is Stack with me
I did all the commands But the Neighbor OSPF not show me this Connect or Nat
and after that I Coll the Women responsible She Sae
All people the Have the Prablem You Havet
and I Clike to Contenuo
Saw God Lack
if You Need Samtheing anthing
Gust
only
xbx-2007@hotmail.com
I did my route exam yesterday and thank God i passed 941/1000…the dorms and labs are still valid. Thanks Gogy, thanks Digitaltut…
Ahmed
hi could someone tell me whether this sim will appear as it is (wrt topology) i know that ip’s will change (but those who have appeared in exam) plz tell whether this sim would have area Id’s mentioned like (area 11/54 here) in simulator or do we have to use extra cmd’s like sh ip protocols or sh ip ospf process to find area id’s……i have route exam in couple of days????
hi i need the Cisco 1240G AP autonomous into light weight could someone tel me the free link plz. thanks form digitaltut
please help me guys…
is it true if english is not your native language you can get extra time? if so how to request?
@AL
WHEN U REGISTER ON VUE WEBSITE….THEY SEND ALL THE DETAILS TO YOUR EMAIL INC EXTRA TIME & ALL!!!!!
http://ciscocertindia.blogspot.com/2011/04/latest-pass4sure-ccnp-642-902-route.html
please what dumps is good for my preparation towards my bsci exams this month?
Hi all ¡¡
Its necesary this in the exam??
R1(config)# Interface Loopback0
R1(config-if)# ipv6 ospf 1 area 0
R4(config)# Interface Loopback0
R4(config-if)# ipv6 ospf 1 area 54
Please can anyone answer this? Its the lab of digitaltut valid ?
@batman R4′s loopback address (FEC0:4:4) must be seen in R1′s routing table, so the command on R4 required, but if it’s already configured, we don’t have to type it twice. Also we must notice the instruction “does no change the current area assignments”.
So while setting up this lab on GNS3 should i have to define IPv6 addresses on the interface of R1, R2, R3, R4 ??
Otherwise If I assume that the` Ipv4 addresses on the interfaces then i have to make a Tunnel for that.
But I didnt get why they have define the router ID in IPv4.
Thanks
Hi all ¡¡¡
Finnaly you make ipv6 ping FEC0:1::1 from r4?
Tahnks
Hi all,
How do you know the process you need to use? You use the ospf process you have watch in the show run or you need to use another.
The process is already configured, so you need just change the virtual-links in orden to ping the L0 of the R4.
I pass today with 895 =)
In this test you can’t ping (you can use “:” ) just check the route with “sh ipv6 route”.
@Shickima thanks ¡¡
Finaly you ping FEC0:1::1 from R4?
Kind regards
Nop, you just can check the result by “sh ipv6 route”.
R1 cant ping R4′s loopback, and on R4 you won’t see R1 loopback. Anyway fixing virtual link will give you 100%
Hi All,
I passed (642-902) 965/1000 on Jun 4 2011.
I have worked with
“http://www.examcollection.com/cisco/Cisco.TestKing.642-902.v2011-02-23.by.Kutad.272q.vce.file.html”
Questions are axactly same. And I have worked from digitaltut labs, thanks all for explain.
This lab wants these steps:
1-Add some config.
2-Remove unneeded config.
3-ping from R1 to Loopbac interface of R4.
config of digitaltut is valid.
————————————-
Thanks
Dear all, By The Grace Of ALLAH, I have passed my paper 930/1000……….
The questions and labs are same given in this dumps. Only the IP addresse and routers name in labs are chane and in 1 lab EIGRP OSPF Redistribution Sim
having telenet requirement too. 2 drag drops are different out of 3.
Thanks for this dumps http://www.examcollection.com/cisco/Cisco.Prepking.642-902.v2011-05-17.by.Sandy.273q.vce.file.html.
hi,
can someone please email the latest dumps from Acme, pass4sure or valid CCNP Route dumps at my email: ccna.pathan@gmail.com.
Thank you so much for your help,
can someone tell me if this labs are still valid.i wil be writting my exam in 3days time.i also nid d gns3 set up and lab solutions.princelekanakins@yahoo.com.thanks
@ Hamid Ali Khan
What are the telnet requirements?? for eigrp ospf redistribution sim
Guys.. Dont mess up anything !!
sure.. it’s 4 labs same as Digitaltut. In MCQ Try to downlaod and study Examcollection (Kutad is the best I recommend which I have studied)
Dont try to study dums in Digitaltut…. its so old !!
Hi everyone,
I passed 642-902 with 930 on 16/7/2011 . I used Test inside v 6.28 and all Q and Labs were from it without any change even IP addresses.you can download it from http://www.4shared.com/document/rjXsxC69/642-902V628.html.
-Best for All
Hi everybody ,
i don’t know how to download labs from digitaltut .. plz help
Hi Anonymous…use the link above to download all you need
hi anyone can explain -y unicast routing command not needed here ?
Hi Ahmed, could you please send me the Test Inside? please i can not download it since it requires some credit cards. The address is stangeek6@yahoo.com
Good News !!!
I have a updated dump contact me for it
kellysmith114@gmail.com
Question and answer 100% same.
hi all
i cleared my route exam today. The Labs were – EIGRP – OSPF Redistribution Sim – Policy Based Routing Sim – IPv6 OSPF Virtual Link Sim – OSPF Sim