Courseiva
← 300-410
Full test
mediumMultiple ChoiceObjective-mapped

300-410 Practice Question: Consider this configuration on Router R2: ```…

Consider this configuration on Router R2: ```

interface Tunnel0

ipv6 address 2001:DB8:3::1/64 tunnel source GigabitEthernet0/0 tunnel mode gre ipv6 tunnel destination 2001:DB8:4::2 ``` Which statement is true?

⚠ Common exam trap

Cisco often tests the distinction between 'tunnel mode gre ipv6' (GRE over IPv6 transport) and 'tunnel mode ipv6ip' (IPv6 over IPv4 transport), and candidates mistakenly assume that any tunnel with IPv6 addresses must use ipv6ip mode.

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

✓

This tunnel will encapsulate packets using GRE over an IPv6 transport.

The configuration shows a tunnel with `tunnel mode gre ipv6`, which explicitly sets the tunnel to use GRE encapsulation over an IPv6 transport. The tunnel source and destination are IPv6 addresses, and GRE can carry multiple protocols (including IPv4, IPv6, and others) over the IPv6 transport. Therefore, option C is correct because the tunnel encapsulates packets using GRE over an IPv6 transport.

Answer analysis

Option-by-option breakdown

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

  • ✗

    This tunnel can only carry IPv6 traffic.

    Why it's wrong here

    GRE can carry multiple protocols; the transport is IPv6, but payload can be IPv4, IPv6, etc.

  • ✗

    The tunnel source and destination must be IPv4 addresses.

    Why it's wrong here

    With 'gre ipv6', the transport is IPv6, so source and destination are IPv6.

  • ✓

    This tunnel will encapsulate packets using GRE over an IPv6 transport.

    Why this is correct

    GRE over IPv6 is correctly configured, allowing multiprotocol payload.

  • ✗

    The tunnel mode should be 'ipv6ip' for IPv6 transport.

    Why it's wrong here

    ipv6ip is for IPv6 over IPv4, not GRE over IPv6.

About these practice questions

One of 1,966 original 300-410 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →

How Courseiva writes practice questions · Editorial policy

JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.