Question 1,396 of 2,152
VRF-LitemediumMultiple ChoiceObjective-mapped

Quick Answer

The answer is weight. In a VRF-Lite environment, BGP best path selection follows the same Cisco-proprietary tie-breaking rules as in a global routing table, and weight is always evaluated first—the path with the highest weight is preferred, regardless of any other attribute. This attribute is locally significant to the router and is not advertised to peers, making it a powerful tool for influencing inbound traffic on a per-neighbor basis. On the Cisco CCNP ENARSI 300-410 exam, this concept often appears in scenario-based questions where you must determine why a specific path is chosen within a VRF, and a common trap is confusing weight with local preference—remember that weight is checked before local preference, even though local preference is more widely used. A simple memory tip is “Weight comes first, local preference comes second,” or think of weight as the “first weigh-in” before any other attribute tips the scale.

300-410 VRF-Lite Practice Question

This 300-410 practice question tests your understanding of vrf-lite. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.

Which BGP attribute is used as the first tie-breaker when selecting the best path in a VRF-Lite environment?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

  • Clue: "best"

    Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.

  • Clue: "first"

    Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

Question 1mediummultiple choice
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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

Weight

BGP selects the path with the highest weight (Cisco proprietary) as the first tie-breaker, followed by local preference.

Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

Answer analysis

Option-by-option breakdown

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

  • Local preference

    Why it's wrong here

    Local preference is the second tie-breaker after weight.

  • Weight

    Why this is correct

    Weight is a Cisco-proprietary attribute and is checked first in the BGP best-path selection process.

    Clue confirmation

    The clue words "best", "first" in the question point toward this answer.

    Related concept

    Static NAT maps one inside address to one outside address.

  • AS path length

    Why it's wrong here

    AS path length is the third tie-breaker.

  • MED

    Why it's wrong here

    MED is the fourth tie-breaker.

Common exam traps

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Detailed technical explanation

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

  • Static NAT maps one inside address to one outside address.
  • PAT allows many inside hosts to share one public address using ports.
  • Inside local and inside global describe the private and translated addresses.
  • NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

  • Identify inside and outside interfaces first.
  • Check whether the scenario needs static NAT, dynamic NAT or PAT.
  • Do not confuse NAT matching ACLs with normal packet-filtering intent.

Key takeaway

NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

Real-world example

How this comes up in practice

A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.

What to study next

Got this wrong? Here's your next step.

Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.

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FAQ

Questions learners often ask

What does this 300-410 question test?

VRF-Lite — This question tests VRF-Lite — Static NAT maps one inside address to one outside address..

What is the correct answer to this question?

The correct answer is: Weight — BGP selects the path with the highest weight (Cisco proprietary) as the first tie-breaker, followed by local preference.

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

Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.

Are there clue words in this question I should notice?

Yes — watch for: "best", "first". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.

What is the key concept behind this question?

Static NAT maps one inside address to one outside address.

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Last reviewed: Jun 18, 2026

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