OSPF Hotspot
Here you will find answers to OSPF Hotspot Questions
Question
The company and the company network have both been growing rapidly. Multiple adds, moves and changes have been applied to the network. Your boss has asked you to troubleshoot a recent OSPF synchronization problem that has arisen. There have been synchronization problems at separate locations in the OSPF area 0. There have been reported link failures during the rapid growth of the company network. You are required to resolve the OSPF problem. OSPF must be able to converge when the network changes.

Refer to the information above to answer the following 4 questions:
Question 1
Examine the following excerpt from the “show ip ospf” command on D1:
| Area BACKBONE (0) Number of interfaces in the this area is 1 Area has no authentication SPF algorithm last executed 00:00:31.280 ago SPF algorithm executed 5 times Area ranges are Number of LSA 13. Checksum Sum 0x16F0FD Number of opaque link LSA 0. Checksum Sum 0×000000 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Flood list length 0 Area 16 Number of interfaces in this area is 2 Area has message digest authentication SPF algorithm last executed 00:00:34.928 ago SPF algorithm executed 7 times Area ranges are Number of LSA 5. Checksum Sum 0x02FCD3 Number of opaque link LSA 0. Checksum Sum 0×000000 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Flood list length 0 |
Based on the information shown above, what is most likely causing the different missing routes throughout the network?
A. Area 16 is configured with authentication.
B. Area 16 has been configured to use the same interfaces as Area 0.
C. Area 0 and Area 32 have been configured with mismatched LSA numbers.
D. Area 16 has been configured as a total stub network
E. Area 16 has been configured as a stub network
F. Area 0 is discontiguous.
G. None of the above
Answer: F
Explanation
From the topology, we see D1 has 2 interfaces belong to Area 0, that are interfaces Fa0/1 & Fa0/2 but the output says there is only one interface in Area 0 (Number of interfaces in the this area is 1). Therefore we can deduce that a link in area 0 was down and area 0 is discontiguous.
Question 2
Which configuration command on D1 (with a similar command on D2) will provide an immediate solution to the missing route problem?
A. no area 16 stub
B. no area 16 authentication message-digest
C. area 16 virtual-link 8.187.175.82
D. area 16 virtual-link 172.16.4.2
E. no area 16 stub no-summary
F. network 172.16.0.0.0.0.255.255 area 16
G. None of the above
Answer: C
Explanation
To fix this problem immediately without changing the topology we need to create virtual link between D1 & D2. If you are still confused how to use the virtual link, check out the IPv6 OSPF Virtual Link Sim article.
Question 3
The log of d1 reports the following:
| %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to down %OSPF-5-ADJCHG: Process 1, Nbr 8.187.175.82/32 on FasstEthernet0/1 from FULL to DOWN, Neighbor Down: Interface down or detached |
This event was anticipated due to maintenance; however, it resulted in excessive lost routes. Which route should be the only one removed from the routing tables of the routers?
A. 8.187.175.82/32
B. 10.138.43.0/30
C. 10.206.180.0/30
D. 4.249.113.59/32
E. 10.201.0.0/30
F. None of the above
Answer: E
Explanation
From the log we learn that the link of Interface Fa0/1 has been down. This link belongs to network 10.201.0.0/30 so we just need to remove this route from the routing table.
Question 4
The R2 router has lost connectivity to R1. The following is R1′s current route table:
| 172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks O IA 172.16.230.0/24 [110/21] via 10.138.43.1, 00:00:03, FastEthernet0/0 O IA 172.16.209.0/24 [110/22] via 10.138.43.1, 00:00:03, FastEthernet0/0 O IA 172.16.1.0/30 [110/21] via 10.138.43.1, 00:00:03, FastEthernet0/0 10.0.0.0/30 is subnetted, 1 subnets C 10.138.43.0 is directly connected, FastEthernet0/0 |
Which expected route is missing from R1′s route table based on the topology during the maintenance period?’
A. o 172.16.0.0 [110/2] via 10.138.43.1, 00:00:09, FastEthernet0/0
B. o IA 9.152.105.122 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
C. o IA 10.138.0.0 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
D. o IA 10.249.0.0 [110/2] via 10.138.43.1, 00:00:09, FastEthernet0/0
E. o IA 4.249.113.59 [110/2] via 10.138.43.1, 00:00:09, FastEthernet0/0
F. o 8.187.175.82 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
G. O 10.206.180.0/30 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
H. O IA 10.206.180.0/30 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
Answer: G
Explanation
In the past, I used to choose answer F as the correct answer but the explanation from DOX3003 (commented on November 19th, 2010) seems to be correct:
“Which expected route is missing from R1′s route table based on the topology during the maintenance period?
X…….
X. O 10.206.180.0/30 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
X. O IA 10.206.180.0/30 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
X…….
You can see there are 2 options for the network between D2 and R2. One with “IA” and one without. O – OSPF, IA – OSPF inter area.
Before link failures between D1 and D2 the network 10.206.180.0/30 has been appearing as “intra area” network in R1′s routing table.
Because they were in the same Area 0.
So the correct answer should be
X. O 10.206.180.0/30 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0″”
is that up to date guys.thanks anyway
Great work guys and great site. I sat my 642-902 exam today and passed with a 920 (first time failed with 788 and second time exam crashed 75% way through, so I have seen the actual exam a few times.) The questions here are accurate except question 4.
Question #4 answer is incorrect in this scenario. Assuming the missing route in question (is after the implementation of the virtual-link to fix the discontiguous Area 0) would actually be ( O 10.206.180.0/30 [110/3] via …)
The route 8.187.175.82 would only be on the routing table of R1 if D2 had a network statement that included the Lo0 interface (that is not the point of the loopback in this scenario). The loopback interface is the router id and used for the virtual-link command only. The D1 switch (where you actually submit the virtual-link commands) does not need to know about network 8.187.175.82 as it is actually the router ID. This is the correct Cisco answer.
In saying that, my problem with this scenario is Cisco has worded the question incorrectly. The question is implying that because of the D1 fa0/1 interface failure and the virtual-link has been implemented, that there should be only one route missing. That is incorrect. In actuality, the routing table on R1 (during the maintenance period but before the virtual-link implementation) is missing 2 networks (10.201.0.0/30 and 10.206.180.0/30). The routing table on R1 (during the maintenance period but after the virtual-link implementation) will actually have both networks (10.201.0.0/30 and 10.206.180.0/30). The 10.201.0.0/30 network would be present because switch D2 is connected to D1 (via virtual-link) thus advertising the 10.201.0.0/30 network. This is just me being picky.
i have just started my ccnp i need help plz somebody share with mein some good routing stuff
bdaboy22 You wrote just what I thought to myself about Question 4,
Thank you.
bdaboy22, 10.201.0.0/30 would not be in the routing table after the virtual link is connected.
D2 is not advertising 10.201.0.0/30 as the interface is down… A router does not advertise a connected network if the interface is down.
@ Anonymous
You are correct. I just noticed there is a glitch with GNS3. When you admin shut an interface, the far-end of a link in an UP/UP state. In real life that far-end interace would be in a down/down state and will not advertise the network attached. Good catch.
I still didn’t really understand The answer to Q4,
Why would I see D2′s loopback in the routing table?
even if we’ll set a virtual link between D1+D2, it wont be in the routing table, so why?
Is the OSPF_Hotspot.jpg not showing just for me or anyone else?
I updated the image link and you can see the image now.
so whats the answer to Q4..
Please can any1 confirm.
I am missing something why is a Virtual Link necessary Area 16 is connected to Area 0 redundantly through both D1 and D2. If the link fa01 connections between D1 and D2 fails Area 16 is still connected through the path between fa 0/24 on D1 and D2 and the fa02 connections. I don’t see why a virtual link is necessary. Though some routes may be advertised as external?
Excuse the previous comment I meant some routes may come in as IA. The better post is below:
I am missing something why is a Virtual Link necessary Area 16 is connected to Area 0 redundantly through both D1 and D2. If the link fa01 connections between D1 and D2 fails Area 16 is still connected through the path between fa 0/24 on D1 and D2 and the fa02 connections. I don’t see why a virtual link is necessary. Though some routes may be advertised as IA ans summarized perhaps?
Hi folks
would be great if someone could share the latest p4s. or guide me towards the correct questions to learn.
nurul.global@yahoo.com
thanks
Question 4
The R2 router has lost connectivity to R1. The following is R1′s current route table:
—-//—–
Answer: F
Explanation
8.187.175.82 is the loopback interface of D2 which is needed to maintain the virtual link between D1 & D2. During the maintenance period, the virtual link will be removed and we can’t see this loopback interface because the area 0 will be discontiguous.
This is wrong answer, if u see at the image, u can notice that loopback interface does not participate in any ospf area, they used only for RID. BTW to maintain virtual link we have not to be able to ping (or access some other way) another router RID.
And i notice that u havent proper answer here, on real exam in this question there is an option with
O 10.206.180.0/30 [110/21] via 10.138.43.1, 00:00:03, FastEthernet0/0
which one is only correct answer.
I spent a lot on this hotspot on exam, and i got OSPF 100%
Hi Mongolio,
Need some help on question 4 here. Is it true that we need virtual link in between D1 and D2 because both the interfaces of D1 and D2 are connected in the same area ( i.e. D1′s fa0/1 and D2′s fa0/1 are in same area)
Question 4
both networks 8.187.175.82/32 (network with one ip) and 10.206.180.0/30 will be missing so the only reasonable answer is F
Hi guys, i am new in this site, so would like to know which is the latest dump to study for ccnp routing, i just got the latest dump from examcollection and dont know if it´s helpful or not, can anyone help me on that. My exam is this coming saturday…
cheers
Can u anyone tell me please – whether IP MULTICAST questions are still pop in exam or not?please …please…please….
Which expected route is missing from R1′s route table based on the topology during the maintenance period?’
A. o 172.16.0.0 [110/2] via 10.138.43.1, 00:00:09, FastEthernet0/0
B. o IA 9.152.105.122 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
C. o IA 10.138.0.0 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
D. o IA 10.249.0.0 [110/2] via 10.138.43.1, 00:00:09, FastEthernet0/0
E. o IA 4.249.113.59 [110/2] via 10.138.43.1, 00:00:09, FastEthernet0/0
F. o 8.187.175.82 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
what is the answer for this OSPF hotspot
@nitin
Why u dont see the answer on this page!!!!!!!!!!!!!!!!!!!!!!!!!!!
the 4th is not right i think is the link between r2 and d2
Thnx to The Almight…
also to those contributed on d site, esp. digitaltut.
Passed Route today with 944. PG 3.37 still valid.though with new DnD. i thnk d Ospf hotspot will need alot of review.
Pls. digitaltut, kindly see to no. 4 question on d hotspot, wat came on d xam had a more specific subnet as IA, btw R2 n Swith2. havin dis subnet in d options, kindly review d answer to d question.
Regards,
@ashraf:
No multicast in 642-902 exam…
the 4th question is wrong answer,I don’t get 100% about this segment,I think the right link is between R2 adn D2,Please take care aout the answer when you take exam.
PLease can anyone clarify the question 4
what is the question and what is the answer…………..
Thanks in advance
PLEAAAAASEE, CAN SOMEONE CLARIFY QUESTION 4?
guys, i think the ans for question 4 is E
1, loopbackface of D1 & D2 are router IDs, used to build the virtual link betwenn arae 16,if you
want them show up in the routting table ,you must defined them into area 16 ,(the router id do not need
to define into areas,becuase they can be learned from LSA),from the meanning of this question,wo can guess that
the loopbackface must have been defined into OSPF area 16,use command :
net 4.249.113.25 0.0.0.0 area 16(the same command on D2)!
2,on r1′S routting table ,loopbackface must be learned from the type-3 LSA and willed be seen
as O IA 4.249.113.58/32 [AD/COST] via 10.128.43.1 , the entry will be stable, no matter there is a
virtual link or not,and the entry O IA 8.187.175.82/32 via 10.128.43.1 will also remain. so,ans F is
incorrect!!!!
correct ans is E
I agree with the Chinese Farmer. Answer should be E.
The choice “F” is incorrect because it is missing “O IA” as the CF stated.
Only choice that makes sense is “E” since it is a loopback address of D1.
the answer is never E . You’d better go and do this lab
So what is the final answer for number 4? People who took the exam already, what did u found out?
What is the final answer for Question 4?
is it F or E?
The correct order of questions are
Question 1
The log of d1 reports the following:
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down
%LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to down
%OSPF-5-ADJCHG: Process 1, Nbr 8.187.175.82/32 on FasstEthernet0/1 from FULL to DOWN,
Neighbor Down: Interface down or detached
This event was anticipated due to maintenance; however, it resulted in excessive lost routes. Which route should be the only one removed from the routing tables of the routers?
Question 2
Examine the following excerpt from the “show ip ospf” command on D1:
Based on the information shown above, what is most likely causing the different missing routes throughout the network?
Question 3 (Question no 4 in Hotspot)
The R2 router has lost connectivity to R1. The following is R1′s current route table:
172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
O IA 172.16.230.0/24 [110/21] via 10.138.43.1, 00:00:03, FastEthernet0/0
O IA 172.16.209.0/24 [110/22] via 10.138.43.1, 00:00:03, FastEthernet0/0
O IA 172.16.1.0/30 [110/21] via 10.138.43.1, 00:00:03, FastEthernet0/0
10.0.0.0/30 is subnetted, 1 subnets
C 10.138.43.0 is directly connected, FastEthernet0/0
Ans:
======================================================================================================
o 10.206180.2/30 [110/21] via 10.138.43.1, 00:00:03, FastEthernet0/0 (R2′s interface which is in area 0 as the area 0 becomes discontigous) (Correct ans)
======================================================================================================
Question 4
Which configuration command on D1 (with a similar command on D2) will provide an immediate solution to the missing route problem?
Follow the above order and solve the questions. I had passed on 12 Nov and got 100% in OSPF.
Hi guys
what devices are D1&D2? I am using gns3 lab how so would you simulate D1&D2 in gns3 environment ? please, someone explain these device and how to configure in gns3.
thanks,
Hi An
these are layer 3 SWs.On GNS3 configure 2 routers with the 16E-SW modules(Switching module).Create the connections manually and make those interfaces layer 3 interfaces (no switchport) add ip address and create the rest of the topology and configure the OSPF domain.
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
Hi all,
I just took the exam yesterday.
For question 4, you will see on the real exam for answer F that it has an OI at the beginning.
Hope that helps.
Hi stub,
Do you mean the answer is
F. o 8.187.175.82 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0 ?
R6#sh ip route
Codes: C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF external type 2
i – IS-IS, su – IS-IS summary, L1 – IS-IS level-1, L2 – IS-IS level-2
ia – IS-IS inter area, * – candidate default, U – per-user static route
o – ODR, P – periodic downloaded static route
stub ,Where is the OI you are refering to?
Hi All,
I got OSPF hotspot today in my exam.
Actually for the 4th question, they had some 6 options in which we have routes for
(i)O IA 10.206.0.0 and
(ii)O 10.206.0.0
O IA- interarea OSPF routes
O- intra area OSPF routes
As 10.206.0.0 routes are learned via area 0, the correct answer is to select the option with O in it that belongs to D2. Rest everything are same as per this site.
Thank you CCNP_Route you make lot of sense.
Hi, guys!
I’ve passed today with score 966.
I’ve had this HOT-spot on the exam.
Answer for question 4 is wrong here.
Let me explain why.
First of all,
The questions have been set in different sequence on the exam (IT IS VERY IMPORTANT FOR UNDERSTANDING THE SENSE):
1st. Question 3. Which route should be the only one removed from the routing tables of the routers?
2nd. Question 4. Which expected route is missing from R1′s route table based on the topology during the maintenance period?
3rd. Question 1. What is most likely causing the different missing routes throughout the network?
4th. Question 2. Which configuration command on D1 (with a similar command on D2) will provide an immediate solution to the missing route problem?
According this sequence firstly we know about link failure between D1 and D2. And route to the network has been only one removed from routing tables of Routers after the link failed between D1 and D2.
Then, basing on that information, we can suppose what expected route has been missed from R1′s routing table.
On the exam you will have an answers for the question like:
Which expected route is missing from R1′s route table based on the topology during the maintenance period?
X…….
X. O 10.206.180.0/30 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
X. O IA 10.206.180.0/30 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
X…….
You can see there are 2 options for the network between D2 and R2. One with “IA” and one without. O – OSPF, IA – OSPF inter area.
Before link failures between D1 and D2 the network 10.206.180.0/30 has been appearing as “intra area” network in R1′s routing table.
Because they were in the same Area 0.
So the correct answer should be
X. O 10.206.180.0/30 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0″
If you find the GNS3 (WinVista) files from don’t work due to below Errors:
—————————————————————————————————–
“Dynagen management console for Dynamips (adapted for GNS3)
Copyright (c) 2008 GNS3 Project
=> *** Warning: Could not connect to dynamips server 127.0.0.1:7200
*** Error: errors during loading of the topology file, please correct them
—————————————————————————————————————–
1) Open the xxxx.net file using notepad
2) Change :Line2: from [127.0.0.1:7200] to [localhost:7200]
3)Change:Line3: workingdir = C:\…… to match to your settings
4)Change:Line6: image = C:\…… to match to your settings
5) Save xxxx.net file and open it usng GNS3
6)”EXtract Strtup Configs” from your directory
7)Save everything
hi everybody
i take the exam yesterday the lab here are all valid and about this hot spot one thing which is important is that it say read all the questions before u start answering i think that is important.
thanks digitaltut
Just reviewing this hotspot for my exam on wed.I labbed it on GNS3 and these are some considerations,possibly useful to somebody else:
1) first event is the area 0 D1-D2 link goes down,the consequence on R1 and R2 is that the area 0 becomes split in 2 parts with no connectivity between R1 and R2.
They continue to receive the interarea routes O IA (from area 16) but lose both intraarea ones O .So not only the area 0 D1-D2 link (10.201.0.0/30) as you would expect from the failure(1st answer),but R1 loses R2-D2 link( 10.206.180.0/30) and R2 loses R1-D1 link (10.138.43.0/30).Even if the addresses are different the other link missed in either R1 or R2
is an O route(intraarea) ,this is the second answer.
2)The area 0 split ( discontinous 3d answer)can be sorted in different ways,but the anwer specify a virtual-link between D1 and D2 to reestablish a virtual ospf connection.
Here in real life we check the show ip ospf neighbor command to find out the Router-id of the 2 routers to be used for the config,although the 2 loopbacks are the common candidates for that role(4th answer).
So to sum up whatever the addresses :
1st answer : area 0 D1-D2 link lost
2nd answer: along with that the other O route either on R1 or R2 will be missing,the O IA are OK and the loopbacks should not even show in the route tables so are certainly wrong.
3d answer: discontinous area 0
4th answer: area 16(do not get confused with area0) virtual-link between D1 and D2 router-ids.
All the best for the exam (including me !) :)
is there any one who could help me sending pdf notes and questions valid for ccnp switch
pls send me at zyeacob@gmail.com
Correct answer: 10.206.180.0/30 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
My OSPF was 100%.
The questions sequence is wrong.
@ Joe
you are right is an O route,it depends on which Router table you are looking at.
The sequence is now clear all of this has to start with a link failure(D1-D2 area 0) to make sense.Thanks.
@DOX3003
your explaination is perfect.
thx to all of you guys.
First of all.the link between D1 f0/1—-f0/1 D2 is down.
based on this,then
Q1 the only one removed route is 10.201.0.0/30
Q2 the expect missing route on R1 is O 10.206.180.0/30 .not OIA because of this route had learned from area 0 instead of inter-area 16.
Q3 what cause the problem ?—area 0 is seperated into 2 discontiguous parts.
Q4 how to fix this problem immediately?—build a virtual-link
this iz the right sequence.good luck!
Hi,
regardless the sequence of the question in the real exam, which is the correct answer?
E or F ?
and why?
who passed the exam with 1000/1000 ?
thanks
Massi
please can you inform me about is OSPF hot spot same or not?
I have passed. This came with different Ip address.
Thank you Mohamad!
Learn Frame Relay and ip help-address
http://www.youtube.com/watch?v=hHortaLwjn8
can someone send me the passguide 3.37 please my email is riewagee@yahoo.co.uk
please any body can you update information about this hotspot
i did’n understand any thing
where the answers what are th questions?
1st answer : area 0 D1-D2 link lost
2nd answer: along with that the other O route either on R1 or R2 will be missing,the O IA are OK and the loopbacks should not even show in the route tables so are certainly wrong.
3d answer: discontinous area 0
4th answer: area 16(do not get confused with area0) virtual-link between D1 and D2 router-ids.
for example please help!
Hi all
i tried to do the lab using GNS3 n got the following error………..please help
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
Open GNS3 and create router with needed IOS, start it do various command in terminal and then do calculate idle-pc. Apply this value and reopen your lab.
Hey, yesterday I complied CCCNP(Route)
Thnx to all specially @ Digitaltut
How many Hotspot scenarios in ROUTE Exam, please help me some one from this site, I am going to write ROUTE Exam, please send to this email id : saravandxb@gmail.com
Also if some one have the latest CCNP Route dumps please send to the same email id
Thanks and regards
Saravana kumar
Hi all,
dis is Mir Here,
I hv just completed CCNA, and i wish to go for CCNP,But
I dont know Which Dumps or Book should i go thru. Please anyone help me for my dreams come true…..
please send anything that can help me for CCNP exm.
please send leatest dumps copy to my mail_ mir.alom@yahoo.com
I will ever greatful to u…………..
Regards,
Mir
Hi! i just took the exam last feb 11 and passed.
Regarding the question where R1 has lost its connectivity to R2
******************************
he R2 router has lost connectivity to R1. The following is R1′s current route table:
172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
O IA 172.16.230.0/24 [110/21] via 10.138.43.1, 00:00:03, FastEthernet0/0
O IA 172.16.209.0/24 [110/22] via 10.138.43.1, 00:00:03, FastEthernet0/0
O IA 172.16.1.0/30 [110/21] via 10.138.43.1, 00:00:03, FastEthernet0/0
10.0.0.0/30 is subnetted, 1 subnets
C 10.138.43.0 is directly connected, FastEthernet0/0
Which expected route is missing from R1′s route table based on the topology during the maintenance period?’
A. o 172.16.0.0 [110/2] via 10.138.43.1, 00:00:09, FastEthernet0/0
B. o IA 9.152.105.122 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
C. o IA 10.138.0.0 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
D. o IA 10.249.0.0 [110/2] via 10.138.43.1, 00:00:09, FastEthernet0/0
E. o IA 4.249.113.59 [110/2] via 10.138.43.1, 00:00:09, FastEthernet0/0
F. o 8.187.175.82 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
*****************************************************
I didn’t choose the loopback (letter f.) In my exam, there are choices for the D2-R2 network. (O IA 10.206.xxxx and O 10.206.xxxx). I chose O 10.206.xxxx. Just carefully read the question to check which should be the best answer. R1s routing table also has slight differences on the actual exam. Thanks.
this i great job…you pple are rili performing .i give it to you.
Is the OSPF_Hotspot.jpg not showing just for me or anyone else?
http://www.7techs.com/bsci-exam?start=2
955 marks
Hello there. I have just finished working on this lab on real devices – sorry but I don’t fully trust dynamips/gns3 as it can get a bit buggy sometimes.
So, to clarify, please read below:
Answer to Q1:
—————————-
When the link between D1 and D2 goes down in area 0, the area 0 becomes discontiguous. It was mentioned earlier that the network 10.206.180.0/30 hanging off R2 would still be seen on R1 – this is not the case as this contradicts the main rules of ospf which is, all areas should hang off area 0, the backbone area. In this case, because area 0 becomes discontiguous, no updates are passed between the “two” backbone areas (remember they are split apart!).
Answer to Q2:
—————————-
I can confirm that a quick fix is indeed adding virtual link between D1 and D2. Also, I’d like to confirm that the loopbacks are not, and they dont have to be in ospf – as long as they are set as router IDs for the respective routes. As soon as you add the virtual link, all routes are back in the routing table, APART FROM 10.201.0.0 /30 – this is because this network is part of the network segment which is physically down!!!
Answer to Q3
—————————
This is a bit tricky due to how it’s been worded! Keep in mind that the questions asks which network *should* be removed! They are not asking which network is actually removed! My answer is:
Two networks are removed; once we add the virtual link, there will be only one network missing !! And that’s how it should be!!! There is no way we are going to see 10.201.0.0/30 in the routing table since that network segment is actually down!!
Answer to Q4
—————————
Here we are during the maintanance period. So I assume the link in area 0 between D1 and D2 is down. Also looking at the provided routing table, it’s fairly clear that the virtual link has not been added at this stage since the route hanging off R2 is missing!
Another wording issue … mind the word “maintanance” – this is not a failure in the network; to me, this link is down with maintance purposes! In this case, what is the network that you would expect to have access to ?? Answer that, and you have the answer to the question. My answer is defenitely 10.206.180.0 /30 – The weird thing is that this is not part of the available answers.
HOWEVER, as geneaux mentioned in a previous post, this network is part of the available answers in the real exam!!
Hope this clears up some confusion.
@Rafael: gn3 uses real IOS images.. with that said… only the program itself would be “buggy”, not the IOS commands or output.
@ccna_voice_guy – I know; however, in my opinion, nothing replaces the real device. Plus, dynamips, despite using real IOS images, it’s still an emulation and therefore there can always be bugs – and I know there are.
plz anybody tell me latest simulation
for ccnp
Hii
This is prasad i want to complete BCMSN 642-813 Exm
I dont know Which Dumps or Book should i go thru. Please anyone help me for my dreams come true…..
please send anything that can help me for CCNP exm.
please send leatest dumps copy to my prasadkonda2010@gmail.com
I will ever greatful to u…………..
Guys any idea about the new CCNP dumps ?? also please let me know the Simulation reliability as well
Center Large area many session rooms impressive keynote rooms lunch area was more than enough. Training B I tried to follow 2 categories Carrier Metro MPLS VPLS While you could clearly understand that most of the presenters were experts in their area some of them were talking too fast or were speaking english in a strange way. Cisco Certified Learning Partners in some areas may include the exam along with a training course for a single price.Q.
plz guys i have just finish learning route book what the version i can get to study to pass the exam….thanks
For question 4. I can’t understand from where did they took and put in R1′s routing table this route? :
O IA 172.16.209.0/24 [110/22] via 10.138.43.1, 00:00:03, FastEthernet0/0
I can’t find it in the picture. Are they mistanking it for another route in AREA 16? If so for which?
Also why won’t we expect to see 12.10.1320/24 in the routing table of R1?In my opinion it should be there as much as the loopback.
I also followed Rafael logic and if we can assume that the virtual link is not created yet and the link in area 0 between D1 and D2 is down for maintainance 10.206.180.0 /30 should definently NOT be in R1 table as this network is in a separate AREA 0 network.
Any comments on my thoughts?
thanks tintin its gns 3 lab i got in the net z working nw…
thanks a lot hey
boy that test is a big fart
yes answers in question 4 doent make sense, why would you see a route with next hope of router’ itself int IP? am i missing smth here?
Alright Guys, Question 4 is VERY incorrect:
Question 4
The R2 router has lost connectivity to R1. The following is R1′s current route table:
172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
O IA 172.16.230.0/24 [110/21] via 10.138.43.1, 00:00:03, FastEthernet0/0
O IA 172.16.209.0/24 [110/22] via 10.138.43.1, 00:00:03, FastEthernet0/0
O IA 172.16.1.0/30 [110/21] via 10.138.43.1, 00:00:03, FastEthernet0/0
10.0.0.0/30 is subnetted, 1 subnets
C 10.138.43.0 is directly connected, FastEthernet0/0
Which expected route is missing from R1′s route table based on the topology during the maintenance period?’
A. o 172.16.0.0 [110/2] via 10.138.43.1, 00:00:09, FastEthernet0/0
B. o IA 9.152.105.122 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
C. o IA 10.138.0.0 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
D. o IA 10.249.0.0 [110/2] via 10.138.43.1, 00:00:09, FastEthernet0/0
E. o IA 4.249.113.59 [110/2] via 10.138.43.1, 00:00:09, FastEthernet0/0
F. o 8.187.175.82 [110/3] via 10.138.43.1, 00:00:09, FastEthernet0/0
A: Is clearly there, that is not the link that is down, it will be seen as a IA route
B: This network doesnt exist in the topology.
C: This network would be there, it is directly connected.
D: This network doesnt exist in the topology
E: This network is the loopback on D1, would be seen as they have a fully working neighborship
F: This network does not appear to be part of the OSPF process, and wouldnt be in the routing table.
So F is technically correct, but the question is so wrong that it is more the least wrong answer. The question is also not very clear. This routing table was clearly typed out manually or copied wrong, it has no subnet masks and the format of the routing table looks strange to me.
If anything, a reminder that study is required to pass the CCNP exam, not the dumps.
Can someone please explain question 1. How can we deduce that area 0 is discontiguous?
Thanks!
Hi Jen,
the question is “what is most likely causing the different missing routes throughout the network”. ==> Most likely so you have to guess what could cause a problem of missing routes.
If you look in the output :
Area BACKBONE (0)
Number of interfaces in the this area is 1
Area has no authentication
(…)
you can see that there is only one interface in the area 0 so one possible problem could be that there is a link missing between D1 and D2 in area 0 ==> Discontinous
About to go ahead and do my CCNP, finished the CCNP route book by Wendell Odom, just wondering what exam dumps are helpful where I can prepare for an exam better…
Thanks in Advance.
mohamed we have the same problem..i am stufying the book by jeff and jenifer though
any previous exam takers find any dumps that are helpful??????
Is this already fixed in the test? I’m gonna take the examination this monday please advice!!!!
Center Large area many session rooms impressive keynote rooms lunch area was more than enough. Training B I tried to follow 2 categories Carrier Metro MPLS VPLS While you could clearly understand that most of the presenters were experts in their area some of them were talking too fast or were speaking english in a strange way. Cisco Certified Learning Partners in some areas may include the exam along with a training course for a single price.Q.
What a great web log. I spend hours on the net reading blogs, about tons of various subjects. I have to first of all give praise to whoever created your theme and second of all to you for writing what i can only describe as an fabulous article. I honestly believe there is a skill to writing articles that only very few posses and honestly you got it. The combining of demonstrative and upper-class content is by all odds super rare with the astronomic amount of blogs on the cyberspace.
in 28th this month .i wanna to go to a test. do anynone have update for the TK. could you send the TK to my e-mail address 125574923@qq.com.
thanks a lot…
can any one tel me
why the interface f0/24 on both switches have the same ip address? ??
thank you
hello guys
I’m going to prove routing next month in some places I see multicast issues and not others. Multicast is falling on the test?
I think mongolio is right as R 2 lost connectivity so the subnet between R2 & D2 will b missing in the routing table of R1
Preparing for Router and InshAllah will appear in next week…….
wish me :-)
HELLO GUYS ARE THESE QUESTIONS STILL USEFULL AND UP TO DATE THK U
As far as the question 4 goes, you MUST follow the scenario, and not take the question as “stand alone”, i.e. which is the correct answer. The answer is F. The loopback i/f is not in the table because the maintenance virtual link is down(for whatever reason).
:-)
Hello guys..
does anyone have ccnp route 642-902 cbt, pass4sure or any dumps. kindly send me links on shariq2009@live.com or u can send here as well.
Thanksss
get it from http://www.careercert.info/
Hi, after reading everything, DOX3003 has provided the correct explanation for question 4.
Has somebody taken the exam recently? Is this OSPF Hotspot still valid? Thanks.
Hi everybody,
Can somebody clarify the following regarding hotspot questions:
1. Each hotspot question has 4 sub questions right.
Do we have to answer the subquestions in order as 1,2,3,4.
or can we go the order which ever is easier for us and come back to the previous one.
I mean can we go back and forth and select which ever order we like???
Thanks