Refer to the exhibit. The default-information originate command is configured under the R1 OSPF configuration. After testing, workstations on VLAN 20 at Site B cannot reach a DNS server on the Internet. Which action corrects the configuration issue?
A.
Add the default-information originate command on R2.
B.
Add the always keyword to the default-information originate command on R1.
C.
Configure the ip route 0.0.0.0 0.0.0.0 10.10.10.18 command on R1.
D.
Configure the ip route 0.0.0.0 0.0.0.0 10.10.10.2 command on R2.
B cannot reach a DNS server on the Intern, there for the static route of the last resort should be configure to point to the internet, therefor the given answer is correct
That doesn't explain how it site B at Router 2 gets routed to Router 1. The DNS server IP wouldn't be on R1 so it would also need to use the default-route.
Someone please tell me how im out to lunch here, I understand routing tables
"default-information originate" command results in advertising a default route. But, the router which it was configured should first have a default route.
As you can see, R1 does not have a default route. That's why the answer is correct. configuring a default route on R1 will result in R1 advertising a default route to R2. R2 nets will now have a default route pointing to R1, then to internet where DNS server resides.
I wander if the question is missing context or if this is a (choose two) question. Yes "C" corrects the DNS issue at "Site A" but it does not fully correct the DNS issue at Site B.
Because there is a Connected Route in both routing tables already (of R1 and R2) for this connection. If you configure an static route between them (R1 and R2), it would be redundant, and it could replace the OSPF route because AD of the Static Route, but it doesn't meets the problem of reaching to the internet.
both A and B correct?
"default-information originate always" command, a default route can be generated and advertised even if there is no default route.
Of course, also correct to register default route static.
only choose one, answer is C?
R1 is already got a route to reach the internet, there is no need to add a static route.
Anyway both C and D are correct answers and this is why I hate Cisco.
Can someone explain why not B? My understanding is that default-information originate always command would make R1 to advertise a default route even if it is not in R1's routing table. The following link explains the above. At this point, I don't see why B and C cannot be both correct answers. Thanks!
https://medium.com/network-warrior/ospf-default-route-10d8d7c251dc#:~:text=In%20OSPF%2C%20the%20%E2%80%9Cdefault%2D,route%20in%20the%20routing%20table.
R1/R2 needs a default route to the internet. R1 needs to have the default route statically entered. R2 will learn the static route from R1 because R1 already configured with default-information originate.
"default-information originate" command results in advertising a default route. But, the router which it was configured should first have a default route.
As you can see, R1 does not have a default route. That's why the answer is correct. configuring a default route on R1 will result in R1 advertising a default route to R2. R2 nets will now have a default route pointing to R1, then to internet where DNS server resides.
R1 & R2 can communicate but the computer can't go outside of the intranet because the Router doesn't have a route to intranet so we need to add the static route to internet.
C is correct
https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/47868-ospfdb9.html
https://medium.com/network-warrior/ospf-default-route-10d8d7c251dc#:~:text=In%20OSPF%2C%20the%20%E2%80%9Cdefault%2D,route%20in%20the%20routing%20table.
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