mediumMultiple Choice
300-410 Practice Question: Runs the following command to verify MPLS L3VPN…
A network engineer runs the following command to verify MPLS L3VPN operation:
R1# show ip route vrf CUSTOMER-A summary
Output: Route Source Networks Subnets Overhead Memory (bytes) connected 2 0 48 288 static 1 0 24 144 ospf 100 5 2 168 1008 bgp 65000 10 3 312 1872 External: 10, Internal: 0, Local: 0 Total 18 5 552 3312
What does this output indicate?
⚠ Common exam trap
The trap here is reading only the 'Networks' column and ignoring the 'Subnets' column, which leads candidates to undercount total routes — 300-410 frequently tests whether you can correctly sum both columns.
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 VRF has 23 total routes
The 'Total' row shows 18 networks and 5 subnets, giving 23 total routes in the VRF. The summary output aggregates route sources, and the total line combines all route entries across connected, static, OSPF, and BGP sources. Therefore the VRF contains 23 routes in total.
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 VRF has 23 total routes
Why this is correct
18 networks + 5 subnets = 23 total routes.
- ✗
The VRF has 10 BGP routes
Why it's wrong here
BGP has 10 networks and 3 subnets, so 13 total BGP routes.
- ✗
The VRF is using OSPF as the only IGP
Why it's wrong here
OSPF is present, but also connected, static, and BGP.
- ✗
The VRF has no external BGP routes
Why it's wrong here
The output shows External: 10, so there are external routes.
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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.