The correct interpretation is that the route 10.10.10.0/24 is installed in VRF CUSTOMER-A with an MPLS label of 101 for forwarding. This is directly indicated by the `mpls labels in/out nolabel/101` field, where "out" shows the label applied to packets leaving the PE router toward the remote CE, while "nolabel" for incoming means no label was received from the local CE. On the Cisco CCNP ENARSI 300-410 exam, this output tests your ability to read `show ip bgp vpnv4 vrf` for MPLS VPN route label forwarding, a core skill for troubleshooting MPLS Layer 3 VPNs. A common trap is confusing the "in/out" labels: remember that "out" is the label pushed onto the packet for transport across the MPLS backbone, not the label received from the BGP peer. The route being "valid, internal, best" confirms it is actively used for forwarding, even though it is not advertised to any peer. Memory tip: Think of "out" as the "exit stamp" for the packet leaving the VRF toward the MPLS cloud.
300-410 Device Access Control Practice Question
This 300-410 practice question tests your understanding of device access control. 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.
A network engineer runs the following command to troubleshoot a Device Access Control issue:
R1# show ip bgp vpnv4 vrf CUSTOMER-A 10.10.10.0/24
BGP routing table entry for 10.10.10.0/24, version 2
Paths: (1 available, best #1, table CUSTOMER-A)
Not advertised to any peer
Refresh Epoch 1
Local
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The route 10.10.10.0/24 is installed in VRF CUSTOMER-A with an MPLS label of 101 for forwarding.
The output shows that the route 10.10.10.0/24 is installed in VRF CUSTOMER-A (table CUSTOMER-A) with an MPLS label of 101 for outgoing forwarding, as indicated by 'mpls labels in/out nolabel/101'. The route is valid, internal, and best, meaning it is used for forwarding despite not being advertised to any peer. This confirms that the MPLS label is applied for forwarding within the VRF context.
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.
✓
The route 10.10.10.0/24 is installed in VRF CUSTOMER-A with an MPLS label of 101 for forwarding.
Why this is correct
The output shows the route is best and has an MPLS label of 101 for outbound forwarding.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The route 10.10.10.0/24 is not installed because it is not advertised to any peer.
Why it's wrong here
The route is installed as best; 'not advertised to any peer' means it is not being advertised outbound, but it is in the table.
✗
The route 10.10.10.0/24 is learned from an external BGP peer.
Why it's wrong here
The path is marked as 'internal', meaning it came from an iBGP peer.
✗
The route 10.10.10.0/24 has no MPLS label and will be forwarded using IP lookup.
Why it's wrong here
The output shows 'mpls labels in/out nolabel/101', meaning an outbound label of 101 exists.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that 'not advertised to any peer' means the route is not installed or usable, but in MPLS VPN contexts, a route can be installed and used for forwarding even if it is not advertised to BGP peers.
Trap categories for this question
Command / output trap
The output shows 'mpls labels in/out nolabel/101', meaning an outbound label of 101 exists.
Detailed technical explanation
How to think about this question
In MPLS VPN environments, the 'mpls labels in/out' field indicates the incoming label (from the peer) and outgoing label (to the next hop). Here, 'nolabel/101' means the route was received without a label (nolabel) but will be forwarded with label 101, which is typical for VRF routes redistributed into BGP with a label allocation. The 'not advertised to any peer' status often occurs when the route is learned via a VRF route-target import but not re-advertised due to BGP policies or because it is the only path.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
Device Access Control — This question tests Device Access Control — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The route 10.10.10.0/24 is installed in VRF CUSTOMER-A with an MPLS label of 101 for forwarding. — The output shows that the route 10.10.10.0/24 is installed in VRF CUSTOMER-A (table CUSTOMER-A) with an MPLS label of 101 for outgoing forwarding, as indicated by 'mpls labels in/out nolabel/101'. The route is valid, internal, and best, meaning it is used for forwarding despite not being advertised to any peer. This confirms that the MPLS label is applied for forwarding within the VRF context.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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