Exam 300-101 topic 1 question 506 discussion

Actual exam question from Cisco's 300-101

Question #: 506
Topic #: 1

SIMULATION -

EIGRP Stub Sim -

By increasing the first distant office, JS manufactures has extended their business. They configured the remote office router (R3) from which they can reach all
Corporate subnets. In order to raise network stableness and lower the memory usage and broadband utilization to R3, JS manufactures makes use of route summarization together with the EIGRP Stub Routing feature. Another network engineer is responsible for the implementing of this solution. However, in the process of configuring EIGRP stub routing connectivity with the remote network devices off of R3 has been missing.
Presently JS has configured EIGRP on all routers in the network R2, R3, and R4. Your duty is to find and solve the connectivity failure problem with the remote office router R3. You should then configure route summarization only to the distant office router R3 to complete the task after the problem has been solved.
The success of pings from R4 to the R3 LAN interface proves that the fault has been corrected and the R3 IP routing table only contains two 10.0.0.0 subnets.

See explanation below -

Show Suggested Answer

Suggested Answer: Explanation
Notice that R3 is configured as a stub receive-only router. The receive-only keyword will restrict the router from sharing any of its routes with any other router in that EIGRP autonomous system. This keyword will also prevent any type of route from being sent.
Therefore, we will remove this command and replace it with the eigrp stub command:

R3#configure terminal -

R3(config)#router eigrp 123 -
R3(config-router)#no eigrp stub receive-only

R3(config-router)#eigrp stub -

R3(config-router)#end -
Because we want the routing table of R3 only have 2 subnets so we have to summary sub-networks at the interface which is connected with R3, the s0/0 interface of R4.

R4>enable -

R4#configure terminal -

R4(config)#interface s0/0 -
R4(config-if)#ip summary-address eigrp 123 10.2.0.0 255.255.0.0
Now we jump back to R3 and use the show ip route command to verify the effect
But in your real exam, if you see the line "10.0.0.0/8 is a summary,"¦.Null0" then you need to summary using the network 10.0.0.0/8 with the command "ip summary-address eigrp 123 10.0.0.0 255.0.0.0" . This configuration is less optimize than the first but it summaries into 2 subnets as the question requires (maybe you will not see this case, don't worry!).

by thanhtq00104 at April 3, 2025, 5:51 p.m.

Comments

Submit Cancel

Currently there are no comments in this discussion, be the first to comment!

Exam 300-101 All Questions

View all questions & answers for the 300-101 exam

Exam 300-101 topic 1 question 506 discussion

Comments

SY0-701