Question 758 of 2,152

Route Redistribution →mediumMultiple ChoiceObjective-mapped

How to Identify Redistributed BGP Routes: Local Path and Origin IGP

This 300-410 practice question tests your understanding of route redistribution. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

A network engineer runs the following command on Router R1:

R1# show ip bgp 10.1.1.0/24

BGP routing table entry for 10.1.1.0/24, version 10 Paths: (1 available, best #1, table default) Advertised to update-groups: 1 Refresh Epoch 1 Local

10.2.2.2 from 10.2.2.2 (2.2.2.2)

Origin IGP, metric 0, localpref 100, valid, external, best rx pathid: 0, tx pathid: 0x0 Community: 100:200

Based on this output, what is the problem?

A
The route 10.1.1.0/24 is learned via an eBGP session and has a local preference of 100.
Why wrong: The route is marked as 'Local', meaning it was redistributed from an IGP, not learned via eBGP.
B
The route 10.1.1.0/24 is redistributed from an IGP into BGP, as indicated by the 'Local' path.
The 'Local' path attribute in BGP indicates the route was originated locally via network statement or redistribution from an IGP.
C
The community 100:200 is automatically assigned by BGP for all redistributed routes.
Why wrong: Communities are not automatically assigned; they must be configured via route-maps.
D
The route is not being advertised to any peers because it is not marked as best.
Why wrong: The route is marked as best, so it is advertised.

Full breakdown with real-world context →

Quick Answer

The answer is that the route 10.1.1.0/24 is redistributed from an IGP into BGP, as confirmed by the 'Local' path in the show ip bgp output. In BGP, the path attribute field displays 'Local' specifically when a route has been injected into BGP through redistribution rather than learned via a neighbor, with the 'Origin IGP' code further confirming it originated from an interior gateway protocol. This scenario tests your ability to identify redistributed BGP routes with Local path, a key skill for the Cisco CCNP ENARSI 300-410 exam where redistribution between IGPs and BGP is a common troubleshooting focus. A frequent trap is confusing 'Local' with a locally originated network statement—remember that a network statement would show a '0.0.0.0' next-hop, not a remote neighbor like 10.2.2.2. Memory tip: "Local path means local injection, not local learning."

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The route 10.1.1.0/24 is redistributed from an IGP into BGP, as indicated by the 'Local' path.

The output shows a BGP route with 'Local' as the path, meaning it was redistributed into BGP locally. The origin is IGP, and the community is 100:200. The route is valid and best. However, the 'Local' path indicates redistribution from an IGP into BGP, which is common in redistribution scenarios.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
The route 10.1.1.0/24 is learned via an eBGP session and has a local preference of 100.
Why it's wrong here
The route is marked as 'Local', meaning it was redistributed from an IGP, not learned via eBGP.
✓
The route 10.1.1.0/24 is redistributed from an IGP into BGP, as indicated by the 'Local' path.
Why this is correct
The 'Local' path attribute in BGP indicates the route was originated locally via network statement or redistribution from an IGP.
Related concept
Read the scenario before looking for a memorised answer.
✗
The community 100:200 is automatically assigned by BGP for all redistributed routes.
Why it's wrong here
Communities are not automatically assigned; they must be configured via route-maps.
✗
The route is not being advertised to any peers because it is not marked as best.
Why it's wrong here
The route is marked as best, so it is advertised.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.

Detailed technical explanation

How to think about this question

This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.

KKey Concepts to Remember

Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.

TExam Day Tips

Underline the problem statement mentally.
Watch for words such as best, first, most likely and least administrative effort.
Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A practitioner preparing for the 300-410 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.

What to study next

Got this wrong? Here's your next step.

Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

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FAQ

Questions learners often ask

What does this 300-410 question test?

Route Redistribution — This question tests Route Redistribution — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The route 10.1.1.0/24 is redistributed from an IGP into BGP, as indicated by the 'Local' path. — The output shows a BGP route with 'Local' as the path, meaning it was redistributed into BGP locally. The origin is IGP, and the community is 100:200. The route is valid and best. However, the 'Local' path indicates redistribution from an IGP into BGP, which is common in redistribution scenarios.

What should I do if I get this 300-410 question wrong?

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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