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Exam 300-410 topic 1 question 81 discussion

Actual exam question from Cisco's 300-410
Question #: 81
Topic #: 1
[All 300-410 Questions]


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?

  • A. Router R1 should configure ip summary address eigrp (AS number) 10.0.0.0 255.0.0.0 for the R1 Fast Ethernet 0/0 connected interface.
  • B. Router R1 should configure ip route 10.0.0.0 255.0.0.0 null 0 for the routes that are received on R1.
  • C. Router 10.1.100.10 should configure ip route 10.0.0.0 255.0.0.0 null 0 for the routes that are summarized toward R1.
  • D. Router 10.1.100.10 should configure ip summary address eigrp (AS number) 10.0.0.0 255.0.0.0 for the R1 Fast Ethernet 0/0 connected interface.
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️
by Huntkey at Sept. 11, 2022, 5:20 p.m.

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Huntkey
Highly Voted 2 years, 2 months ago
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.
upvoted 8 times
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Tim303
Most Recent 4 months ago
R1 is receiving the summarization from other router therefore the summarization must be configured from the other router not R1, hence D is correct answer.
upvoted 1 times
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[Removed]
4 months, 1 week ago
Selected Answer: D
D is correct
upvoted 1 times
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jansan55
1 year, 2 months ago
Selected Answer: D
A good explanation: https://study-ccna.com/eigrp-automatic-manual-summarization/
upvoted 3 times
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inteldarvid
1 year, 4 months ago
Selected Answer: D
D is correct
upvoted 2 times
...

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