EIGRP OSPF Redistribution Sim
Question
Answer and Explanation:
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 tens of 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
Note: If the delay is 20000us then we need to divide it by 10, that is 20000 / 10 = 2000
Note: “usec” here means microsecond (which is 1/1000 milliseconds). According to this link: 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=100000 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
R3(config-router)#redistribute ospf 1 metric 100000 100 255 1 1500
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 external routes to 105, which is smaller than the Administrative Distance of OSPF (110) -> the link between R2 & R3 will be preferred to the serial link between R2 & R4.
A reader on our site has a closer explanation for the “distance eigrp 90 105” command so we quote it here for your reference:
|
The “distance” refers to the administrative distance of the routes provided by a given routing process. By default, internal (which means non-redistributed) EIGRP routes are given an administrative distance of 90 while external (redistributed from another routing process) EIGRP routes are given an administrative distance of 170. The default administrative distance of OSPF is 110. The administrative distance measures the “distance from the truth” and tells the router which routes are more trustworthy. Lower administrative distance = more trustworthy. For this reason, connected routes have an administrative distance of 0. They are the MOST TRUSTWORTHY, because they are physically connected to the router. When making a decision about which route to install in the routing table, the router looks at administrative distance first. The metric (or cost) is only considered if two routes have the same administrative distance. In this case, R2 will learn about R4’s loopback network from both R4 and R3. The route from R4 will be in OSPF (admin distance of 110) because R2 is also running OSPF while the route from R3 will be an external EIGRP route (administrative distance of 170 by default). Since the OSPF route has a lower administrative distance, it will get placed in R2’s routing table and the R3-provided route will be ignored. This is not optimal, since the path through R3 is a faster, more reliable path. To fix this, we change the administrative distance of external EIGRP routes at R2 by using the “distance eigrp 90 105” command. This sets the administrative distance of internal EIGRP routes to the default of 90 and changes the administrative distance of external EIGRP routes to 105 (less than that of OSPF routes). Now, when R2 learns of the loopback network from R4 and R3, it will install the now lower administrative distance external EIGRP route from R3 and our traffic from R1 will take the faster path. |
Note: Please check the OSPF process numbers first before typing these commands.
If you want to have a closer look at this sim and understand more about the “distance eigrp” command, please read my OSPF EIGRP Redistribute Lab in GNS3.
Other lab-sims on this site:
hey guys, failed my exam today. do you know why “distance eigrp 90 105” command didn’t work for me?
Hi Bold,
what syntax did you use?
Which LABs did appear in the exam?
Hi guys
Can someone advise if the SPOTO Q227 & 300-101 V23.75 still valid enough ?
I have the exams soon. or share the dumps anyone? I have the GNS3 Labs with IOS to
run will share soon.
Anyone who recently wrote please advise.
Hi Steve,
#R2
conf t
router eigrp 100
distance eigrp 90 105
end
I validated with trace and show ip route
also, for some reason, “copy run start” didn’t work for me and I didn’t save any configs.
I did have 3 sims OSPF Evaluation, EIGRP OSPF redistr, EIGRP Stub.
Can someone please post the questions for this lab. thanks.
Hi guys! one of the requirement said:
you must be able to ping and telnet. My question is do we have to configure LINE VTY TO ALLOW TELNET? OR JUST PING WILL BE ENOUGH
The reason why i would like to know is because it will require a password as we all know. |I have my exam next week
Hi Guys, Hope you are fine… Can you please assist me in order to get CCNP ROUTE dumps.
smkwarsi(at)hotmail(dot)com
Thanks in advance for the attention & consideration.
Please someone should respond to @Bold question
what is the correct way of saving your configs in the exam
@TACACS+ have you written your exams? how was it?
yes I had
and I passed
I had OSPF VIRTUAL LINK and EIGRP STUB but I couldn’t save any of them. I have tried:
R2#copy running-config startup-config
R2#write memory
none of them works so i have just skipped
I had OSPF VIRTUAL LINK and EIGRP STUB but I couldn’t save any of them. I have tried:
R2#copy running-config startup-config
R2#write memory
none of them works so i have just skipped
TACACS+ can you share how many labs in your exam then is it same lab like here in digitaltut.?
when i open these sims they arent loading the config of the devices. what am i missing?
since r3 is redistributing ospf networks into eigrp with a higher bandwidth should it be preferred without the distance command?
nermind i know why im an idiot
R2:
config t
router eigrp 100
redistribute ospf 2 metric 1000 1 1 1 1
router ospf 2
redistribute eigrp 100 metric 1000 subnets metric-type 1
router eigrp 100
distance eigrp 90 105
R3:
config t
router ospf 3
redistribute eigrp 100 metric 500 subnets metric-type 1
router eigrp 100
redistribute ospf 3 metric 5000 1 1 1 1
Pls I need the latest dump for ccnp 300- 101. Pls send it to my mail kazbest @ Mail . ru
Got a 839/790. 55 questions. 4th time is the charm
If you get the redistribution lab, here is the easier commands then what this site tells you.
R2:
Router eigrp 100 (Verify Number by “Sh Run”)
distance eigrp 90 105
redistribute ospf 1 (verify number by “Sh Run”) metric 500 1 1 1 1
Router ospf 1 (Verify Number by “Sh Run”)
redistribute eigrp 100 metric 500 metric-type 1 subnets
R3:
Router eigrp 100 (Verify number by “Sh Run”)
redistribute ospf 1 (Verify number by ‘sh run”) metric 1000 1 1 1 1
Router ospf 1 (Verify Number by “sh run”)
redistribute eigrp 100 metric 100 metric-type 1 subnets
Those commands worked for me. Much easier to remember for sure.
Router ospf 1 (Verify Number by “sh run”)
redistribute eigrp 100 metric 1000 metric-type 1 subnets
right? you put metric 100 and i think is 1000
Does anyone have the configs for these labs? I’m looking to work them over before the exam.
Pass today, 925
Chinese dump valid
Labs PBR, EIGRP OSPF redistribute, IPv6
Thanks digitaltut and all!
email: philipsmeloo@ gmail .com
Thanks Pira
@Pira
Take a look to the following Cisco documentation:
delay -> Route delay, in tens of microseconds -> Scaled Delay = (Delay/10)
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-sy/ire-15-sy-book/ire-wid-met.html
Why do we use metric-type 1 in redistribute eigrp 100 command in this LAB?
why not only “redistribute eigrp 100 subnets” ?
I took exam and passed 2 days ago! Thanks al of you. Thanks Philips for valid dump!
Where does OSPF 1 come from , why is the process number 1
@ Pira
what are you doing you are also updating with user ” philips ” asking question and then answer
Dear All
dont believe user ” Pira & philips ”
you will find such type of insects around the globe just ignore them
Dear All
dont believe user ” Pira & philips ” this is one person commenting with different names
you will find such type of insects around the globe just ignore them
contact me for real valid dump: muhamadawan1988 @ gmail . com
default metric of E1 is 20. R2 and R3 both redistributed 192.168.1.0 with cost 20. R4 will choose R3 to reach 192.168.1.0. The metric should be specified in R3 when redistributing into ospf
R3: redistribute eigrp 100 metric 84 metric-type 1 subnets
84=20(default metric)+64(serial line cost)
What is the reason to use “metric-type 1”?
It will load balance from R4 to R1 if using E2
It will not load balance if you use E2. That’s common mistake, because you can think that R4 will see 2 routes with metric 20 and will load balance, but that’s not the case.
R4 will send traffic to R3 even if you use E2 routes (20), because it has lower cost to this ASBR.
R4 – R3 – cost is 1 (FastE)
R4 – R2 – cost is 64 (Serial)
Is fa/0 of r3 facing r4?
@Will, you are right. there will be no load balancing because forwarding costs are different. but why “metric-type 1” is used in solution? i have seen a lot of dumps, the same thing is in each of them. i did the lab in EVE-NG and GNS3 and found no reason to use “metric-type 1”. if backward routing from R4 to R1 should be symmetrical it should be done other way. for example metric should be explicitly configured during redistribution on R3 with higher value, it can force R4 select path via R2. the question is what should be done on exam, because there is no kind of “full simulation” there. should “metric-type 1” be included into configuration on exam? because in real life it is completely useless for this case…. *confused*
@Anonymous, just stick to the solution provided here and you will be fine.
Hello, could anyone pass me the last dump of cisco ccnp 300-101?
ageu.lima @ gmail. with
Don’t be idiots. You do not have to put 105 for the distance. As long as the distance is lower than 110 it will be fine.
By every person and their mother using “105” the test centers/cisco/etc sees this crap and starts to monitor the answer trend.
The test centers/cisco and whoever else makes the decisions looks at it like this:
“””All anyone needs to do is use less than 110, so why is there 1000s of answers using 105? Hmmmm, seems like a cheating trend happening”””
The next thing you know, if you barely pass the exam or score exactly the passing score, you may be asked to retake the test after its reviewed. I’ve heard of people having to retake even if they passed because their answers were to consistent with dump site answers. Be smart, don’t everyone use the same damn 105 distance…106, 107, 108, 109, 104, will all work too.
ALL
One hint for the dreaded PBR simulation:
From home GNS3 lab you can test before going into exam as below:
On border fa0/0 set access-list 101 permit tcp any any eq 23
On border set debug ip policy
Then from testing host router do telnet 10.1.101.1
Debug will show what is happening
Route-map (if it works) will match on telnet port 23
This proves that it is working
If not, just create http traffic to test.
On the redistribution lab, do not everyone use damn 105. That creates a cheating trend and cisco and test centers will start tracking same answers from 1000s of people….use your brains.
You guys want real dumps with real summarized notes of all 3 major books:
apkey (tech) at gm@!l . com
I have summarized the 3 major books: How to Master, Official CCNP Guide, and Chris Bryant
I pass the 301-101 today
take care about connections between the routes, i my exam the traffic must take the link with the greates bandwitdh
Hi, anyone with the latest CCNP 300-101 dumps?
why we do it on R2# distance eigrp 90 105 ? shouldn’t we do it on R3?
Because one of the question requirement is:
” All traffic must use the shortest path that provides the greatest bandwidth.”
OSPF route AD is 110 and Eigrp ext. route is 170 ( default)
if not change , it will go by R1-R2-R4 that not meat the question requirment.
So, change the Eigrp ext. AD to 105. ( or smaller than OSPF 110 ) to make it select route to R3 .
So the path = R1-R2-R3-R4
This question was in my exam with a small change the delay for R3 fastethernet was 100 and not 1000 as this example, the rest was the same.
I’ve done the CCNP route two times in which this question came 2x along. For some reason I can’t answer this question.
Why is it that you have to use the command ospf 1 and not ospf 24 /34 since that is the area ID and thus the Process ID?
Also you can enter R4 as well for some reason.
@user42069
OSPF process ID is different from OSPF area ID.
Hi All i am just going for this exam after 2 days is there any update so please share, Advance thanks