300-410 Infrastructure Services Practice Question
A network engineer is configuring DHCPv6 on a Cisco IOS-XE router. The router must provide IPv6 addresses and other configuration parameters to clients on the LAN. The engineer wants the router to assign addresses using stateless address autoconfiguration (SLAAC) but also provide DNS server information via DHCPv6. Which command set correctly configures the router's LAN interface to achieve this?
⚠ Common exam trap
Many exam-takers confuse the managed-config-flag with the other-config-flag; the former forces DHCPv6 for addresses, while the latter only requests other parameters.
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
✓
ipv6 address 2001:DB8:1::1/64 ipv6 nd other-config-flag ipv6 dhcp server POOL
The other-config-flag in router advertisements signals hosts to use DHCPv6 for additional configuration parameters, while addresses are still autoconfigured via SLAAC. The ipv6 dhcp server command attaches the DHCPv6 pool to the interface. The managed-config-flag would force hosts to use DHCPv6 for addresses as well, which is not desired. Other commands like ra-interval or prefix do not control the DHCPv6 usage flags.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
ipv6 address 2001:DB8:1::1/64 ipv6 nd other-config-flag ipv6 dhcp server POOL
Why this is correct
The other-config-flag instructs hosts to use DHCPv6 to obtain other configuration parameters such as DNS, while addresses are still formed via SLAAC. The ipv6 dhcp server command binds the DHCPv6 pool to the interface. This combination meets the requirement of SLAAC for addresses and DHCPv6 for DNS.
- ✗
ipv6 address 2001:DB8:1::1/64 ipv6 dhcp server POOL ipv6 nd ra-interval 30
Why it's wrong here
The ra-interval command adjusts the frequency of router advertisements but does not set the flags that control whether hosts use DHCPv6 for addresses or other parameters. Without the other-config-flag, hosts will not know to request DNS information via DHCPv6, so the configuration is incomplete.
- ✗
ipv6 address 2001:DB8:1::1/64 ipv6 nd prefix 2001:DB8:1::/64 ipv6 dhcp server POOL
Why it's wrong here
The ipv6 nd prefix command manually configures the prefix advertised in router advertisements, but it does not set the other-config-flag. Therefore, hosts will not be instructed to use DHCPv6 for DNS or other parameters, and the requirement is not satisfied.
- ✗
ipv6 address 2001:DB8:1::1/64 ipv6 nd managed-config-flag ipv6 dhcp server POOL
Why it's wrong here
The managed-config-flag tells hosts to use DHCPv6 for both address assignment and other parameters, which contradicts the requirement for stateless address autoconfiguration. Hosts would ignore SLAAC and request addresses from DHCPv6, so this does not meet the design.
Visual reference
Go deeper
Related to this question
About these practice questions
One of 1,401 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 →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
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.