OSPF Evaluation Sim
You have been asked to evaluate an OSPF network and to answer questions a customer has about its operation. Note: You are not allowed to use the show running-config command.
Although in this sim we are not allowed to use “show running-config” command but we post the configuration here so that you can understand more about the topology.
| R1 interface Loopback0 ip address 1.1.1.1 255.255.255.255 ! interface Serial0/0 ip address 192.168.13.1 255.255.255.0 ip ospf network non-broadcast no shut ! router ospf 1 network 192.168.13.0 0.0.0.255 area 0 network 1.1.1.1 0.0.0.0 area 0 |
R2 interface Loopback 0 ip address 2.2.2.2 255.255.255.255 ! interface S0/0 ip address 192.168.23.2 255.255.255.0 ip ospf network non-broadcast no shut ! router ospf 1 network 192.168.23.0 0.0.0.255 area 0 network 2.2.2.2 0.0.0.0 area 0 neighbor 192.168.23.3 |
R3 interface Loopback 0 ip address 3.3.3.3 255.255.255.255 ! interface Ethernet0/0 ip address 192.168.34.3 255.255.255.0 no shut ! interface S1/0 ip address 192.168.23.3 255.255.255.0 ip ospf network non-broadcast no shut ! interface S1/1 ip address 192.168.13.3 255.255.255.0 ip ospf network non-broadcast no shut ! router ospf 1 network 192.168.13.0 0.0.0.255 area 0 network 192.168.23.0 0.0.0.255 area 0 network 192.168.34.0 0.0.0.255 area 1 network 3.3.3.3 0.0.0.0 area 0 area 1 virtual-link 4.4.4.4 neighbor 192.168.23.2 |
| R4 interface Loopback 0 ip address 4.4.4.4 255.255.255.255 interface Ethernet0/0 ip address 192.168.34.4 255.255.255.0 no shut ! interface Ethernet0/1 ip address 192.168.45.4 255.255.255.0 no shut ! interface Ethernet0/2 ip address 192.168.46.4 255.255.255.0 no shut ! router ospf 1 network 192.168.34.0 0.0.0.255 area 1 network 192.168.45.0 0.0.0.255 area 2 network 192.168.46.0 0.0.0.255 area 3 network 4.4.4.4 0.0.0.0 area 1 area 1 virtual-link 3.3.3.3 area 2 nssa area 3 stub no-summary |
R5 interface Loopback0 ip address 5.5.5.5 255.255.255.255 interface Loopback1 ip address 5.5.1.1 255.255.255.255 interface Loopback2 ip address 5.5.2.1 255.255.255.255 interface Loopback3 ip address 5.5.3.1 255.255.255.255 interface Loopback4 ip address 5.5.4.1 255.255.255.255 interface Ethernet0/0 ip address 192.168.45.5 255.255.255.0 no shut ! router ospf 1 network 192.168.45.0 0.0.0.255 area 2 network 5.5.0.0 0.0.255.255 area 2 area 2 nssa |
R6 interface Ethernet0/0 ip address 192.168.46.6 255.255.255.0 no shut interface Loopback 0 ip address 6.6.6.6 255.255.255.255 ! router ospf 1 network 192.168.46.0 0.0.0.255 area 3 network 6.6.6.6 0.0.0.0 area 3 area 3 stub |
Some notices from above configuration:
+ The OSPF network type between R2 & R3 is non broadcast.
+ R3 and R4 is running virtual-link to connect Area 2 & 3 to Area 0
+ Area 2 is a NSSA area while Area 3 is a Totally Stubby area
You can download this sim to practice at http://www.digitaltut.com/download/ROUTE_OSPF.zip. Please use GNS3 with version older than v1.0 to open it (v0.8.3.1 for example). IOS used in this lab: c3640-jk9s-mz.124-16.bin
Question 1
Explanation
To check OSPF LSA we should use the “show ip ospf database” command on R5:
In this sim there is no LSA Type 4 because there is no ASBR so maybe this question wants to ask about LSA Type 3 (Summary Net Link States).
Note: LSA Type 4 is generated by ABR, not ASBR but without ASBR inside the network there are no LSA Type 4 generated. For more information about OSPF LSA Types please read our OSPF LSA Types Lab tutorial.
R3 advertises LSA Type 1 to R4 then R4 converts it into Type 3 and sends to R5 (because R4 is the ABR) so we see the “Link ID” 3.3.3.3 of R3 is advertising by R4 (4.4.4.4). According to the “Age” column, this LSA was advertised 1858 seconds ago.
Question 2
Explanation
Check the Serial1/0 interface of R3 which is connected to R2 with the “show ip ospf interface serial 1/0” command:
There are two things we should notice from the output above:
+ The “network type” connection between R2-R3 is “NON_BROADCAST” (usually we have “BROADCAST”). OSPF neighbors are discovered using multicast Hello packets. In non broadcast environment, multicast (and broadcast) messages are not allowed so OSPF neighborship cannot be formed automatically. Therefore we have to establish OSPF neighborship manually by using “neighbor ” command under OSPF process (OSPF will send unicast Hello message to this address). For example on R2 we have to use these commands:
| router ospf 1 neighbor 192.168.23.3 |
And on R3:
| router ospf 1 neighbor 192.168.23.2 |
+ For non broadcast environment the default Hello timer is 30 seconds; Dead timer (time to wait before declaring a neighbor dead) is 120 seconds and Wait timer (causes the interface to exit out of the wait period and select a DR on a broadcast network. This timer is always equal to the dead timer interval) is 120 seconds. In the output we also see the default timers for non broadcast network.
Question 3
Explanation
We can check the number of executed SPF algorithm via the “show ip ospf” command on R4:
In the output above we can see SPF has been executed 9 times.
Question 4
Explanation
Area 2 (of R5) is a Not-so-Stubby area (NSSA). You can check it by the “show ip ospf” command on R4 or R5 (in Area 2 section). For example, below is the output of “show ip ospf” command on R5:
In general, NSSA is same as normal area except that it can generate LSA Type 7 (redistribute from another domain) so we can see both Loopback interfaces of R5 & R6 in the routing table of R5.
Note: NSSA does not receive a default route by default so you will not see a default route on R5.
Area 3 (of R6) is a Totally-Stubby area so R6 only has one default route to outside world. You can check with the “show ip ospf” command on R4 and R6 (area 3 section):
Notice that on R4 you will get more detail (shows “stub area, no summary LSA”) than on R6 (only shows “stub area”).
R6 is in a totally-stubby area so we will not see any R5’s Loopback interfaces in R6 routing table:
Note: You can see a default (summary) route to the outside (O*IA 0.0.0.0/0 …)
Hi,
I run the simulation and i do not get as the answers show.
any ideas?
anyway can tell me where i can get the latest dumb please?
thank you
There are new questions I did no have in 149q+41q+15q, be careful, I took the test today and failed for few points. if someone has new information please share.
where can i get the 149q+41q+15q, ?
thank you
Is “149q+41q+15q” still Valid ?!! THANX
Thank you Vasia!
Take the exam yesterday. A lot of new question (I have 149+41+15+183+56+82+32+8).
This is what I remember:
-DHCP Option for provide TFTP address to Phones. (Google)
-Drag and Drop about AAA (6 options, 2 for authentication, 2 for accounting and 2 for autorization)
-2 questions about asyncronous routing: In wich case asyncronous routing occurs and how avoid async routing in active/active firewall when using tcp-based connection.
-Two options of GRE to avoid fragmentation.
-Wich ACL option match TCP ACK Header.
-Drag and drop about types of IPV6 NAT.
-Question about IP SLA with a graphic showing two paths and a config are Reworked.
And other 2-3 question that can’t remember, I pass because I know the answers but be careful.
can someone kindly send me the valid 149 + 41q dumps at {email not allowed}
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Can someone send me the latest dump at kat84.mape @gmail.com thanks
Take the exam today (Fail) :/ A lot of new questions. (look at Ghost)
additional to ghost:
-Drag and drop about CHAP and PAP.
same valid vce or pdf? :P
Hi Ghost,
Please send me dumb full 149+41+15+183+56+82+32+8
ngocthanhkien9200@gmail dot com
Thanks
Hi Ghost
can u send me these too ?? zrameez2001 @ yahoo dot com
Anyone that took the exam in this day can give me some info ?
in the digitaltut premiun account i can find all the question ?
the lab is the same ?
Hi Ghost, can you please send the file to wungko @ gmail.com??? pleaseeeee
Hi funghet,
Took exam today and failed 770. around 10 new questions not in dumps.
Kindly share your digitaltut premium account for me to check new question if included.
– some of new questions I remembered AAA drag n drop. 2 for Auth, 2 for Authorization and 2 for Accounting.
– another one with asymmetric routing with active/active firewall as answer.
– and another question on how to eliminate asymmetric routing in active/active firewall setup.
– CHAP n PAP drag n drog question
– lots of TCP/UDP question from my exam.
– SIM were redistribution, policy based and ospf simulation, same here in digitaltut.
Don, i haven’t an account yet :)
…before i want to try some dumps… someone have an updated dump where to study/try ?
Hi all,
Toady one of my friend is fail exam CCNP 300-101. Digitaltut Question and Answer dump is still valid or not.
Trying to use the labs in here and study them. Keep getting errors when opening. Do I have to really use gns3 0.8.3.1 or can I use the latest version? because that is what I have. Does anybody know? Thanks Someone please let me know so that I can practice the labs that are found on the site. Thanks!
hi,
any one have the updated the dumps for CCNP 300-101
is passleadeer dumps are valid
Hi everybody,
my question is that: can some one with a expired CCNA can write CCNP 300-101 EXAM?
@Anonymous, it is possible, Is just that you will have a new data with cisco
@Oluwashina, I thought you need a valid CCNA cert as a prerequisite for the CCNP
I need to give CCNP routing exam can some one please give me valid dump if they have.
email {email not allowed}
I need to give CCNP routing exam can some one please give me valid dump if they have.
bahboodkhan @ gmail.com
latest dump please kradzwan @ gmaildotcom
Hi Ghost. please send me the new exam. new question (I have 149+41+15+183+56+82+32+8). I will take the exam next week my CCNA will expire on May 23. Please help me. Thank you so much.
Hi Ghost. please send me the new exam. new question (I have 149+41+15+183+56+82+32+8). I will take the exam next week my CCNA will expire on May 23. Please help me. Thank you so much. my email is {email not allowed}
Hi Ghost. please send me the new exam. new question (I have 149+41+15+183+56+82+32+8). I will take the exam next week my CCNA will expire on May 23. Please help me. Thank you so much. my email is paul7alejo @ gmail.com
Hi all,
can someone pass the latest questions? matvoj@gmaildotcom
Thank you.
Hi Guys, does anyone took the 300-101 exam this month? if so, what´s new in there? i have VCE PLUS premium exam and studying DigitalTUT sims, are they still valid?
Please I need somebody to confirm this for me, concerning digitaltut dumps, it seems that most of the labs are not responding due to the fact that ip addresses are not configured unlike 9tut topologies.If it is not true, kindly put me through. Thanks
Hi Ghost,
Please send me dumps of 149+41+15+183+56+82+32+8
cmfarrukh@yahoo dot com
Thanks a million
Everything you need to pass the exam.
Compilation of exams and including April and May.
h t t p : / / c o r n e e y . c o m / q D 4 e y d
the pass is
!aAyefgyn-7nP18rSvGvzPPv5FJbO_e8AmeieWSZZtTk
delete the spaces
Please Latest Dump to Me
{email not allowed}
Please send me dumb full 149+41+15+183+56+82+32+8
{email not allowed}
Passed today with 839. Not what i wanted but it’s a pass. I’ve self studied with the Cisco press book, CBT nuggets vids, GNS3 and Packet Tracer, but the books and vids do not cover all the material in the exam which i find very annoying, so thanks to digitaltut and everyone who has contributed.
Several new questions, one or two not even covered by @logipy May’s new questions.
Labs were PBR, EIGRP Stub, OSPF redistribution and OSPF sim.
The OSPF sim with the question on the routes from R1 and R2 to R3 – I could not see any answer that would suffice. Network types were PtP and Broadcast and the timers on both links were 10, 40, 40. Full DR/BDR relationship on Broadcast link, non for PtP. Two questions were to change the timers, one to add neighbour command, can’t recall the 4th. I spent the longest on this so be careful.
Dear All ,
please can any one send to me the latest dump for CCNP routing
{email not allowed}
Dear All ,
please can any one send to me the latest dump for CCNP routing ({email not allowed})
Dear All ,
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can someone send me the update dump, to bahati_rene@yahoo dot com
Dear All ,
please can any one send to me the latest dump for CCNP routing (lima.clovis@gmail dot com)
share with us the update dumps
wendopresto @ gmail .com
Passed today with 790 score, get this score because properly solved sim and labs (they are still valid) used 295 questions latest dump but exam has more than 50 % new questions not included in the damp, also there are 4 or 5 new drag and drop questions.
Hi Guys,
Please send me dumps of 149+41+15+183+56+82+32+8
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Thank You
Hi Guys,
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Dear All ,
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Thank You
Please send me dumps of 149+41+15+183+56+82+32+8
on {email not allowed}
also share questions on it.
which command will used to find serial links that rerminate in router in ospf
Please share the dump for me thanks.
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