Exam 300-510 topic 1 question 125 discussion

Actual exam question from Cisco's 300-510

Question #: 125
Topic #: 1

Refer to the exhibit. A network engineer configured three new PE routers to expand the network. The new routers run the IS-IS routing protocol and reside in the data center in the same exchange as the existing routers. However, the network is now experiencing suboptimal routing. The Layer 2 configuration and VLANs are configured correctly to provide segregation between networks, but the Level 1 routes are not being converted to Level 2 routes. Which action resolves the issue?

A. On Router 1, redistribute the routes into IGP.
B. On Router 2, redistribute the routes into IGP.
C. On Router 1, summarize internal routes between areas.
D. On Router 2, summarize internal routes between areas.

Show Suggested Answer

Suggested Answer: D 🗳️

by Storcaks at Jan. 9, 2024, 8:12 a.m.

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thejag

9 months, 4 weeks ago

Router 1 L0 1.2.2.2/32 IP is overlapping with the 1.1.1.0/24 on the Router 2 - Router 3 link.

upvoted 2 times

DUsoo

8 months, 2 weeks ago

Do you mean --> Router 1 L0 1.1.1.1/32

upvoted 1 times

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Storcaks

11 months, 2 weeks ago

Selected Answer: A

The only choice that makes sense is A. By default, IS-IS protocol leaks routing information from a Level 1 area to a Level 2 area. The only thing that would prevent L1 routes from being leaked into level 2 is if IS-IS is not configured/activated on Router 1.

upvoted 1 times

snowbow

7 months ago

This doesn't make sense to me, as why would they say the issue is specifically "Level 1 routes are not being converted to Level 2 routes" If they aren't activated, they wouldn't even be Level 1 routes I would think

upvoted 1 times

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