Discuss Cisco 300-410 Exam Topic 7 Question 9

Refer to the exhibit.

A network administrator configured mutual redistribution on R1 and R2 routers, which caused instability in the network. Which action resolves the issue?

ASet a tag in the route map when redistributing EIGRP into OSPF on R1. and match the same tag on R2 to allow when redistributing OSPF into EIGRP.

BApply a prefix list of EIGRP network routes in OSPF domain on R1 to propagate back into the EIGRP routing domain.

CSet a tag in the route map when redistributing EIGRP into OSPF on R1, and match the same tag on R2 to deny when redistributing OSPF into EIGRP.

DAdvertise summary routes of EIGRP to OSPF and deny specific EIGRP routes when redistributing into OSPF.

Suggested Answer: C

When doing mutual redistribution at multiple points (between OSPF and EIGRP on R1 & R2), we may create routing loops so we should use route-map to prevent redistributed routes from redistributing again into the original domain.

In the below example, the route-map ''SET-TAG'' is used to prevent any routes that have been redistributed into EIGRP from redistributed again into OSPF domain by tagging these routes with tag 1:

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8 comments · newest first

Lindsay 12 months ago

Wait, are we really tagging routes? That’s surprising!

Wenona 12 months ago

D seems a bit risky, not sure if it’ll stabilize things.

Hollis 1 year ago

C sounds right, denying OSPF into EIGRP makes sense.

Dierdre 1 year ago

I think B could work too, but not sure.

Brett 1 year ago

A is the way to go for tagging!

Gearldine 1 year ago

I'm a bit confused by the options. I'll need to review the information about "NotNow" and consider which scenario best fits that description.

Daryl 1 year ago

I'm a bit confused by all the different settings mentioned in the question. I'll need to carefully review the details to make sure I understand the implications of each option before deciding.

Vallie 1 year ago

Yeah, I practiced a question like this before. If performance consistency is key, then A seems right.

Cisco 300-410 Exam - Topic 7 Question 9 Discussion