The answer is the show ipv6 dhcp interface command, along with show ipv6 interface and debug ipv6 dhcp, which are the three commands used to troubleshoot DHCPv6 client address assignment issues on a Cisco IOS router. The show ipv6 dhcp interface command is correct because it directly reveals the DHCPv6 client state, including the assigned IPv6 address, prefix, and server details for a specific interface, confirming whether the client successfully obtained an address. On the Cisco CCNP ENARSI 300-410 exam, this topic tests your ability to isolate client-side DHCPv6 failures, often appearing in multiple-choice questions where a common trap is confusing show ipv6 dhcp interface with show ipv6 dhcp binding, which only shows server-side leases. Remember that the client uses interface-level commands to verify its own address acquisition, while server commands show the database. A useful memory tip is “Client checks the interface, server checks the binding” to keep the distinction clear.
300-410 DHCP (IPv4 and IPv6) Practice Question
This 300-410 practice question tests your understanding of dhcp (ipv4 and ipv6). The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 THREE commands can be used to troubleshoot DHCPv6 client address assignment issues on a Cisco IOS router acting as a DHCPv6 client? (Choose THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
show ipv6 dhcp interface
Option A is correct because 'show ipv6 dhcp interface' displays the DHCPv6 client state, including the assigned IPv6 address, prefix, and server information for a specific interface. This command directly shows whether the client has successfully obtained an address via DHCPv6.
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.
✓
show ipv6 dhcp interface
Why this is correct
Displays DHCPv6 client state, server address, and lease information.
Related concept
Read the scenario before looking for a memorised answer.
✓
debug ipv6 dhcp detail
Why this is correct
Shows detailed DHCPv6 message exchanges for troubleshooting.
Related concept
Read the scenario before looking for a memorised answer.
✓
show ipv6 interface
Why this is correct
Shows the IPv6 address assigned via DHCPv6 on the interface.
Related concept
Read the scenario before looking for a memorised answer.
✗
show ip dhcp binding
Why it's wrong here
This command is for DHCPv4 server bindings, not DHCPv6 client.
✗
show ipv6 dhcp pool
Why it's wrong here
This shows server-side DHCPv6 pool configuration, not client information.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between DHCPv4 and DHCPv6 commands, expecting candidates to know that 'show ip dhcp binding' is IPv4-only and 'show ipv6 dhcp pool' is server-side, not client-side.
Trap categories for this question
Command / output trap
This command is for DHCPv4 server bindings, not DHCPv6 client.
Detailed technical explanation
How to think about this question
DHCPv6 client address assignment uses the Identity Association for Non-temporary Addresses (IA_NA) option, where the client sends a Solicit message and receives an Advertise and Reply from the server. The 'show ipv6 dhcp interface' command reveals the IA_NA status, lease time, and server DUID, while 'debug ipv6 dhcp detail' captures the full message exchange (Solicit, Advertise, Request, Reply) for granular troubleshooting. 'show ipv6 interface' confirms the interface has a link-local address and is enabled for IPv6, which is a prerequisite for DHCPv6 operation.
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.
TExam Day Tips
→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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
DHCP (IPv4 and IPv6) — This question tests DHCP (IPv4 and IPv6) — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: show ipv6 dhcp interface — Option A is correct because 'show ipv6 dhcp interface' displays the DHCPv6 client state, including the assigned IPv6 address, prefix, and server information for a specific interface. This command directly shows whether the client has successfully obtained an address via DHCPv6.
What should I do if I get this 300-410 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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