mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Examine the following partial configuration on…
Examine the following partial configuration on Router R1: ```
interface Tunnel0
ipv6 address 2001:DB8:1::1/64 tunnel source GigabitEthernet0/0 tunnel destination 2001:DB8:2::2 tunnel mode ipv6ip ``` What is the effect of this configuration?
⚠ Common exam trap
Cisco often tests the distinction between tunnel transport and passenger protocols, trapping candidates who confuse the tunnel destination address family with the tunnel mode requirements.
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 tunnel will not come up because the tunnel destination is an IPv6 address instead of an IPv4 address.
The tunnel mode ipv6ip requires an IPv4 address as the tunnel destination because it encapsulates IPv6 packets inside IPv4 packets for transport over an IPv4 network. In this configuration, the tunnel destination is set to an IPv6 address (2001:DB8:2::2), which is invalid for this tunnel mode, preventing the tunnel interface from coming up.
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 tunnel will successfully encapsulate IPv6 packets in IPv4 and forward them.
Why it's wrong here
The tunnel destination is an IPv6 address, but ipv6ip mode requires an IPv4 destination.
- ✓
The tunnel will not come up because the tunnel destination is an IPv6 address instead of an IPv4 address.
Why this is correct
In ipv6ip mode, both tunnel source and destination must be IPv4 addresses.
- ✗
The tunnel will use IPv6 as the transport protocol, encapsulating IPv4 packets.
Why it's wrong here
ipv6ip mode encapsulates IPv6 in IPv4, not the reverse.
- ✗
The configuration is correct for a 6to4 tunnel.
Why it's wrong here
6to4 tunnels use a different tunnel mode and automatic destination calculation.
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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.