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EIGRP OSPF Redistribution Sim

February 26th, 2012 in LabSim Go to comments

Question: (Hope someone will contribute the detailed requirement of this sim!)

Some information I have gathered so far:

R2 is an ASBR for EIGRP 100 and OSPF AREA 24

R3 is an ASBR for EIGRP 100 and OSPF AREA 34

[note: so there are TWO separate areas on TWO separate ASBRS

thus you need to do redistribution on R2 and R3

R1 is ONLY in EIGRP 100, and is THE ONLY router you can ping from. R4 has a loopback interface thatmust be pinged from R1.

R4 is running OSPF and has redundant link to EIGRP network over R3 router.

The requirement of this sim is traffic from R1 should go to the most optimal route to reach 172.16.100.0/24network

Notice: You should make a ping from R1 to 172.16.100.1 network to make sure everything is workingcorrectly.



Answer and Explanation:

Thanks to POONAM who send us the topology and configuration. She got 100% on EIGRP-OSPF lab so

this solution is perfect! Please say thank to him and others who contribute this lab-sim!

SOLUTION from POONAM

First we need to find out 5 parameters (Bandwidth, Delay, Reliability, Load, MTU) of the s0/0/0 interface (the

interface of R2 connected to R4) for redistribution :

R2#show interface s0/0/0

Write down these 5 parameters, notice that we have to divide the Delay by 10 because the metric unit is in tensof microsecond. For example, we get Bandwidth=1544 Kbit, Delay=20000 us, Reliability=255, Load=1,

MTU=1500 bytes then we would redistribute as follows:

R2#config terminal

R2(config)# router ospf 1

R2(config-router)# redistribute eigrp 100 metric-type 1 subnets

R2(config-router)#exit

R2(config-router)#router eigrp 100

R2(config-router)#redistribute ospf 1 metric 1544 2000 255 1 1500

(Notice: In fact, these parameters are just used for reference and we can use other parameters with noproblem. Also, a candidate said that the simulator didnt accept the Bandwidth of 1544; in that case, we canuse a lower value, like 128.

If the delay is 20000us then we need to divide it by 10, that is 20000 / 10 = 2000)

Note: usec here does not mean microsecond (which is 1/1000 milliseconds) but means millisecond. In shortusec = msec. I dont know why they use the word usec here but just think it is msec (According to thislink: http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080094cb7.shtml#eigrpmetrics:

The delay as shown in the show ip eigrp topology or show interface commands is in microseconds)

For R3 we use the show interface fa0/0 to get 5 parameters too

R3#show interface fa0/0

For example we get Bandwidth=10000 Kbit, Delay=1000 us, Reliability=255, Load=1, MTU=1500 bytes

R3#config terminal

R3(config)#router ospf 1

R3(config-router)#redistribute eigrp 100 metric-type 1 subnets

R3(config)#exit



R3(config-router)#router eigrp 100


Finally you should try to show ip route to see the 172.16.100.1 network (the network behind R4) in the

routing table of R1 and make a ping from R1 to this network.

Note: If the link between R2 and R3 is FastEthernet link, we must put the command below under EIGRP

process to make traffic from R1 to go through R3 (R1 -> R2 -> R3 -> R4), which is better than R1 -> R2 ->R4.

R2(config-router)# distance eigrp 90 105

This command sets the Administrative Distance of all EIGRP internal routes to 90 and all EIGRP externalroutes to 105, which is smaller than the Administrative Distance of OSPF (110) -> the link between R2 & R3will be preferred to the serial link between R2 & R4.

Maybe the copy running-config startup-config command will not work in this lab so dont worry, just skip it.

Note: Please check the OSPF process numbers first before typing these commands. Maybe they are not ospf1 like above.

If you want to have a closer look at this sim and understand more about the distance eigrp command, pleaseread my OSPF EIGRP Redistribute Lab in GNS3.

Other lab-sims on this site:

EIGRP Stub Sim

OSPF Sim

IPv6 OSPF Virtual Link Sim

EIGRP Simlet

Policy Based Routing Sim

Comments

Comment pages Previous 1 17 18 19 26

1. Jim

June 23rd, 2013

The Fast Ethernet links have more bandwidth than the Serial Links.I guess its more optimal path rather

than shortest path. If it asks for shortest path dont use the distance command.

2. rav

June 25th, 2013

Passed today. Required to pass traffic through shortest path with fastest links. So do exactly as the sim



says.got 100 %

3. shruthi @ banJune 25th, 2013

rav @ so fastest and shartest means shartest means r1-r2-r4 if it is fastehetnet between r2and r3 thattime it is fastest link so which one we configure clear it

4. shankarJune 26th, 2013

Passed on Monday boyi dumps and digtatut labs is more enough Concentrate on SIM its littlebit difficulty I faced , but managed because of hands on experience Understand the LAB and do .. its

very easy Best Of Luck Folks.

5. marcell

June 27th, 2013

does the delay on the fast ethernet interface on router 3 facing router 4 need to be 10 instead of 100?

when I do a show int fa0/1 on router 3 it is showing, delay 100.

so, if we device 100/10=10

please assistant

6. Chris

June 28th, 2013

CAN SOMEONE PLEASE TELL ME WHERE I CAN DOWNLOAD THE LAB FOR CCNPROUTE SIMULATOR QUESTIONS!?!?

7. shankarJuly 1st, 2013

@krish Why want to download ???? Create it .Wanna help contact me

8. SalmanJuly 2nd, 2013

passed today with 941/1000 all labs still valid the eigrp stub lab is slightly different from R3 you have toping R4 from loop back interface . will give more details later.Igor dumps are 100% valid.

9. MikeJuly 4th, 2013

Can someone tell where can I downloads the five labsim

10. fedrostar

July 4th, 2013

Does anyone have the gns3 labs for the five labs pleaseee

11. Ala



July 8th, 2013

do i have to use the distance command to chose the path (R1-R2-R3-R4) ?

PLEASE ADVISE .. Thanks :)

12. Rouslan

July 9th, 2013

Here is gns3 labs http://www.4shared.com/file/MNxMccev/GNS3_642-902_Test_Sims.html

13. husnaJuly 9th, 2013

i want take the ccna exam this september.. who can tell me which website can help me.. please

14. husna

July 9th, 2013

tell me at [email protected]

15. M7July 9th, 2013

hi all

I have passed the exam today with score 950.

all labs here was in my exam .

and question exactly from examcollection.com site in the Igors dump .

16. M7

July 9th, 2013

husna

July 9th, 2013

i want take the ccna exam this september.. who can tell me which website can help me.. please

my strongly recommended to you : no need more than 2 sites

1- 9tut.com

2- last dump of http://www.examcollection.com/ sit

but be sure they are new version of ccna and what last day for old version

17. Anonymous

July 10th, 2013

why is it so hard to find the GNS3 topology for these labs?? Can no one upload them?

18. @ husnaJuly 11th, 2013



send me ur mail i wil send u all stuffs ( dumps + labs ) .. and help

19. Lakmal

July 12th, 2013

If anybody needs 5 labs simulation feel free to contact me ;) [email protected]

20. Anonymous

July 12th, 2013

hi all

passed today, thanks digitaltut.

Got 4/5 of the labs.

MCQ from examcollection.com site in the Igors dump still valid.

21. moldova news

July 13th, 2013

ivzgqO Thanks-a-mundo for the blog article.Much thanks again. Will read on

22. khan

July 14th, 2013

mail me if any one wants the GSN3 lab [email protected]

23. akki

July 15th, 2013

Passed the Route exams. I got following simsOSPF Virtual LinkEigrp redis

Policy route mapipv6 ospfeigrp stub.

All the sims were same with IPs being different and for the EIGRP redis sim the link between R4 & R3was a Serial and all other were Fast ethernet.

24. strength of mindJuly 17th, 2013

hi allpassed today, thanks digitaltut.This Lab is same as in digitaltut no worries

25. Anonymous

July 17th, 2013

Hi everyone,



In the second Sim when I enter router eigrp 100 the result isThe command is not correct!Help will be appreciated.

26. CCNP Labs

July 18th, 2013

Hi all,

Does those 5 labs still valid in the CCNP-Route exam ?

Please help to share im going to take CCNP-Route Exam soon.

Your help much appreciated.

27. Happy T joyJuly 18th, 2013

please is any one having CCNP route exam question , please if you have kindly send the link to my mail

[email protected]

Thanks to you all.

28. khanJuly 18th, 2013

had this lab in my exam today fast ethernet links were between R1>R2 and R2>R3rest was same as here

29. femhab

July 20th, 2013

i tried practicing on just installed GNS3, it was requesting for ios image. pls how do i get away with this

30. AtlantaJuly 21st, 2013

Hello,

I passed (906/1000) CCNP route exam today. I got all questions from PASS4SUSURE. but please putsome concentration on options (In exam they shuffled options). I got total 53 questions including 4 labsSIMs and 2 hours time.

all LAB are valid. but, they are changing IP addresses.

31. [email protected] 24th, 2013

Please ladies and gentle men, I have completed my CCNA and heading for the CCNP. Please help me

with reading materials and dumps. Any of the CCNP: Security, Switching, etc. Please help, please.

My email is [email protected].

Thanks may God Almighty bless you.



32. Anon51214July 24th, 2013

Passed my exam today, scored 1000 marks, thanks you guys.

33. BJuly 26th, 2013

Hi everyone,

How come the first path R1-R2-R4 is (2 serial links) is considered slower than R1-R2-R3-R4 (2 serial

links and a fastethernet link). whether it is ospf or eigrp, the cost for the first path is less. can someoneclarify please.

Second. why is there no route filtering although we have to routers performing redistribution? wouldnt

this create routing loops?

34. BJuly 26th, 2013

ok. i just noticed If the link between R2 and R3 is FastEthernet link so that answers the first question.

As for the second question, since the links are directly connected to the affected routers there will be noloops.

I noticed while doing the lab in GNS 3 that if the link between R2 and R3 is serial and we do the labhere like written above. traffic would be asymmetrical. The path from R1 will be R1-R2-R4 which is the

optimal route, but from R4 it would be R4-R3-R2-R1 since R4 will prefer the Fast Ethernet link and thiswont be the optimal route. what are your views?

35. Daniel

July 27th, 2013

This lab on my test today.Connection between R2 & R3 is FastEthernet. Must use this command.

R2(config-router)# distance eigrp 90 105

36. GhorbaJuly 28th, 2013

Passed yesterday with 965/1000labs are the same as digitaltut.

and this lab I found that the link between R2 and R3 is fastethernet so I used the command R2(config-router)# distance eigrp 90 105 under eigrpGood Luck for allThankd digitaltut

37. MoidinJuly 28th, 2013

Hello Guys,

EIGRP Metric(K-Value) is need configure as same number?

or we can configure Different Numbers..!!

38. CCNP Student



July 30th, 2013

Can anybody let us know that whether exam allow you to use ? and TAB in labs ? Thanks. Your helpwill be much appreciated.

39. DanJuly 30th, 2013

If you have GNS3 installed, why and what is that hard to create those sims lab ? remember all of youpassing CCNP meant you know how to configure Right ???What is hard on this Redistribution Sim? you have only 4 routes to configure also

this site is to share issues not to ask for dump and sim file.

40. SaidJuly 30th, 2013

Its necessary to put metric type to 1 when redistubuted in ospf ?

41. Consula

July 31st, 2013

Pass today 958.Labs Valid.

Many thankx to Digitut !!!!

42. dinesh

August 3rd, 2013

passed today 930still valid..

thanks digitaltut.

43. ZTEWTAugust 4th, 2013

Still valid.

R2 -> R3 was FastEthernet for me.

Better to setup in GNS3 and practice several times before you go.

44. PaulAugust 4th, 2013

can someone tell me by email what lab are in the exam for Routing? [email protected]

45. KHNAugust 6th, 2013

Assuming that R2 > R3 is Fastethernet , this means R1 has to choose between R1>R2>R4 (two seriallinks ) OR R1>R2>R3>R4 (one serial link and two Fastethernet ) if you want R1 choosing the path

R1>R2>R3>R4 then what K-values (those 5 parameters) you use when redistributing OSPF intoEIGRP do not matter, WHY?



Because R1 has only way out and it is R2, the path decision has to be made by R2, why R2 chooses theserial interface in first place is because R2 will know the path to 172.16.100.0/24 from R4 as an O IA(OSPF inter area route) and from R3 as an D EX (External EIGRP route). So R2 will choose the serial

link between R2&R4 not because of any metric or k-values but because of the Administrative distanceof OSPF (110) being lower than the administrative distance of External EIGRP router which is 170, theroute with lowest administrative distance will be preferred no matter of metric. Manipulating the default

administrative distance , distance eigrp 90 105 ,of external EIGRP (from 170 to 105) routes and makingthem lower than that of OSPF (110) will make R2 to choose the path R2>R3>R4 ,

46. DeepaReddy

August 8th, 2013

@ALLThis is the easiest lab to set up in GNS3 so far

47. DeepaReddy

August 8th, 2013

@ALL

We can manipulate the path using ACL and route maps but they are not allowed in the exam

48. DeepaReddyAugust 8th, 2013

@ALL

If they say shortest path then no need to use distance commandIf they say optimal path then you need to use distance command to manipulate the route

49. atyu

August 8th, 2013

B have right,

When we have serial link between R2 R3 we will send icmp request to R2, R2 will choose R4because this route has better AD an R4 will send it toward.

ButWhen we receive reply from 172. network on R4, R4 will use route to R1 loopback with bettermetric so:

- with metric-type 2 and defualt metric reply will load balance between R4-R2-R1 or R4-R3-R2-R1- with metric-type 1 and default metric when we receive LSA on R4 we will add cost of link where wereceive this link so network from R3 will add lower cost then LSA from R2 (because FA is better link)

so reply will choose R4-R3-R2-R1 and it is not optimal path for reply in this situation.

50. alphaAugust 11th, 2013

Lab still valid.

51. +++++++++++ hjhg +++++++++++++++++August 12th, 2013



ii have cleared the exam .the dumps available in this site http://ruturl.com/tja

52. Don Know

August 12th, 2013

Under Router OSPF 1, in the command redistribute eigrp 100 metric-type 1 subnets, why do we needmetric-type 1?Couldnt we just put redistribute eigrp 100 subnets?

53. Don KnowAugust 12th, 2013

Also, when we enter the metrics for redistribution on R3, why is the Bandwidth of 10000 not divided by10 and entered as 1000?

54. Don KnowAugust 12th, 2013

Cancel that last question, I was looking at the wrong numbers.

But I still need to know why we should use metric-type 1 ?

55. fatalistAugust 13th, 2013

Passed today with 965 score. They were a few changes in this lab. R1-R2-R3 link was fastethernet and

you need to do distance 90 100 on R2 to pass traffic using shortest path and highest bandwidth link aswas written in description. Need at last to do ping and telnet but telnet not working. I did only ping.

56. AnonTester

August 13th, 2013

When redistributing eigrp into ospf why are we adding metric-type 1 when the default is metric-type

2? Do the directions state to change it to a metric-type 1?

57. AnonTester

August 13th, 2013

Just took test today and passed, metric-type doesnt matter. It doesnt request which metric-type to use.So whatever one you want to use, it doesnt matter as long as you redistribute properly.

58. CERO

August 14th, 2013

info is incompleted. In what area would us configurated the Loopback interface?

59. NKANZE Zack

August 14th, 2013

Dump and lab still valid.

completed exam today 906/1000. But you cant use cop run start in some lab

60. AnonTester



August 14th, 2013

@ceroYoure not configuring a loopback interface, directions dont state to configure one. READ the

instructions.

61. AnonymousAugust 14th, 2013

I Pass today, the sims are 100% valid. Obs: I change the original distance, but It appeared like - - in

show ip prot. before the change, it was 90 170

62. THANG

August 15th, 2013

This lab in my exam hours ago

63. KP

August 15th, 2013

i think ospf process should be 24 on r3 and 34 on r4 as below..comments pls?





64. Don Know

August 15th, 2013

@KP

Im no expert, but the command is used to redistribute the entire OSPF process on a router, not just a

single OSPF area.

The numbers 24 and 34 identify the areas not the OSPF process ID.

65. Don Know

August 15th, 2013

You will need to check the running config (sh run) to get the OSPF process ID.

66. Anonymous

August 16th, 2013

will do it next week

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