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300-410 Exam - Question 81


Refer to the exhibit. An engineer configures the router 10.1.100.10 for EIGRP autosummarization so that R1 should receive the summary route of 10.0.0.0/8.

However, R1 receives more specific /24 routes.

Which action resolves this issue?

Show Answer
Correct Answer: D

In EIGRP, automatic summarization can create summary routes that simplify the route table. For the router to send a summary route instead of the specific /24 routes, the summary address needs to be manually configured on the router that advertises the routes. Hence, the correct action is to configure the `ip summary-address eigrp` command on the interface connected to Router R1 on the router with the IP address 10.1.100.10. This will instruct the router to advertise the summary route of 10.0.0.0/8 to R1.

Discussion

4 comments
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HuntkeyOption: D
Sep 11, 2022

EIGRP with auto-summary turned on, will not auto-summarize external routes, or routes learned from another router. It only summarizes locally injected internal routes. The summary is only generated at the major network boundary. For example, if there is 10.10.10.0/24 locally injected (with network statement) in the EIGRP, but the transit link to the EIGRP neighbor is in 10.0.0.0/24, then the 10.0.0.0/8 summary is not generated.

inteldarvidOption: D
Jul 10, 2023

D is correct

jansan55Option: D
Sep 6, 2023

A good explanation: https://study-ccna.com/eigrp-automatic-manual-summarization/

SeMo0o0o0Option: D
Jul 17, 2024

D is correct