Quick Answer
The correct answer is that LDP is automatically enabled on the interface. This is true because the command `mpls ldp autocfg` triggers LDP autoconfiguration on the interface, meaning the router will automatically establish LDP sessions and assign labels for all directly connected neighbors without requiring manual neighbor statements. It is important to distinguish this from `mpls ip`, which enables MPLS forwarding of labeled packets but does not automatically start LDP. On the Cisco SPCOR 350-501 exam, this concept tests your understanding of MPLS control plane versus data plane commands, and a common trap is confusing `mpls ip` with LDP activation. Remember that `mpls ip` enables forwarding, while `mpls ldp autocfg` enables the LDP protocol itself on that interface. A helpful memory tip is to think of "autocfg" as "auto-config" for LDP—it sets up the control plane automatically, while `mpls ip` simply turns on the data plane for MPLS.
This 350-501 practice question tests your understanding of architecture. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
interface GigabitEthernet0/0/0 ip address 192.168.1.1 255.255.255.0 mpls ip mpls ldp autocfg
Refer to the exhibit. Which statement is true about this configuration?
interface GigabitEthernet0/0/0 ip address 192.168.1.1 255.255.255.0 mpls ip mpls ldp autocfg
LDP is manually configured
Why wrong: Autocfg means automatic, not manual.
MPLS VPN is enabled
Why wrong: These commands do not enable VPN; VRF configuration is needed.
LDP is automatically enabled on the interface
The autocfg command enables LDP automatically.
MPLS forwarding is disabled
Why wrong: 'mpls ip' enables MPLS forwarding.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
LDP is automatically enabled on the interface
The command 'mpls ldp autocfg' enables LDP automatically on the interface. MPLS forwarding is enabled by 'mpls ip'. LDP is not manually configured, and MPLS VPN is not specifically enabled by these commands.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
LDP is manually configured
Why it's wrong here
Autocfg means automatic, not manual.
MPLS VPN is enabled
Why it's wrong here
These commands do not enable VPN; VRF configuration is needed.
LDP is automatically enabled on the interface
Why this is correct
The autocfg command enables LDP automatically.
Related concept
Read the scenario before looking for a memorised answer.
MPLS forwarding is disabled
Why it's wrong here
'mpls ip' enables MPLS forwarding.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
These commands do not enable VPN; VRF configuration is needed.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 350-501 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.
What to study next
Identify which 350-501 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Architecture — study guide chapter
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FAQ
Architecture — This question tests Architecture — Read the scenario before looking for a memorised answer..
The correct answer is: LDP is automatically enabled on the interface — The command 'mpls ldp autocfg' enables LDP automatically on the interface. MPLS forwarding is enabled by 'mpls ip'. LDP is not manually configured, and MPLS VPN is not specifically enabled by these commands.
Identify which 350-501 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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