mediumMultiple Choice
300-410 Practice Question: Runs the following command on Router PE2: PE2#…
A network engineer runs the following command on Router PE2:
PE2# show ip bgp vpnv4 vrf CUSTOMER_A 10.10.10.0 24
BGP routing table entry for 10.10.10.0/24, version 15 Paths: (1 available, best #1, table CUSTOMER_A) Advertised to update-groups: 1 Refresh Epoch 1 Local, imported path from 10.10.10.0/24
10.1.1.1 (metric 20) from 10.1.1.1 (10.1.1.1)
Origin incomplete, metric 0, localpref 100, valid, internal, best Extended Community: RT:100:100 mpls labels in/out 18/19
Based on this output, what is the problem?
⚠ Common exam trap
The trap is assuming a problem exists when the output actually shows a healthy route; candidates might misread the extended community or label information.
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 route is functioning correctly with no issues.
The output shows a valid BGP VPNv4 route in the VRF CUSTOMER_A. The route is marked as 'best' and has the extended community RT:100:100, which is the route target. It is advertised to update-groups, and MPLS labels are present. There is no indication of a problem; the route is functioning correctly.
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 is not being advertised to any BGP peer.
Why it's wrong here
The "Advertised to update-groups: 1" line confirms the route is being advertised to a peer group, so non-advertisement is not the fault. This is tempting because a missing advertisement genuinely breaks VPN reachability, and it would be the answer if that line were absent or showed zero groups.
- ✗
The route is missing the required Route Target community.
Why it's wrong here
The output explicitly lists "Extended Community: RT:100:100", so the route carries a Route Target and import into the VRF succeeded. Route Target checks are tempting because a missing or mismatched RT prevents VPN import, and that would be the answer if no extended community were displayed.
- ✓
The route is functioning correctly with no issues.
Why this is correct
The output shows a valid, best path with the correct RT:100:100 extended community and MPLS label bindings, imported into the CUSTOMER_A VRF. No error, missing route or label mismatch appears, so the VPNv4 route is operating normally.
- ✗
The route has an incorrect label binding.
Why it's wrong here
The output shows valid inbound and outbound MPLS labels (18/19) bound to the prefix, so label binding is functioning. Label verification is tempting because label mismatches do break VPNv4 forwarding, and checking it would be correct if the route showed a label of "no label" or an unallocated value.
Go deeper
Related to this question
Learn chapter
EIGRP Route Summarization and Filtering
Key term
LDP Protocol
LDP, or Label Distribution Protocol, is a protocol that routers use to automatically exchange labels that enable MPLS (Multiprotocol Label Switching) to create fast, efficient paths for data packets across a network.
Key term
MPLS Layer 3 VPN
A technology that uses Multiprotocol Label Switching to create secure, scalable virtual private networks that connect multiple sites at the network layer, where the service provider manages routing between customer sites.
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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.