mediumMultiple Choice
300-410 Practice Question: Runs the following command on Router CE1: CE1#…
A network engineer runs the following command on Router CE1:
CE1# show ip route vrf CUSTOMER_B 10.20.20.0 24
Routing Table: CUSTOMER_B Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/24 is subnetted, 1 subnets B 10.20.20.0 [20/0] via 10.1.1.2, 00:02:34
Based on this output, what is the problem?
⚠ Common exam trap
300-410 often tests the ability to interpret show command output. Candidates may overthink and assume there is a problem when the output actually shows a healthy route. The trap is to second-guess the output and look for hidden issues.
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.
The output shows a BGP route to 10.20.20.0/24 via 10.1.1.2 with an administrative distance of 20 and metric 0, and it has been in the routing table for 2 minutes and 34 seconds. The route is installed and functioning correctly. There is no indication of a problem.
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 installed in the routing table.
Why it's wrong here
The output shows a valid BGP route (code B) installed in the CUSTOMER_B table, so installation is not the fault. It tempts engineers because a missing route entry is a common VRF symptom, but here the prefix is present with a next hop and uptime.
- ✓
The route is functioning correctly.
Why this is correct
The BGP entry shows a valid path to 10.20.20.0/24 in the CUSTOMER_B VRF, with next hop 10.1.1.2 and no route distinguisher or RD mismatch errors. Administrative distance 20 and metric 0 are normal for eBGP, so no fault exists.
- ✗
The VRF is not configured correctly.
Why it's wrong here
The VRF name appears in the output, and the route is present.
- ✗
The next hop is unreachable.
Why it's wrong here
An unreachable next hop would remove the route or flag it, but 10.1.1.2 is listed as the valid BGP next hop with a running uptime. It tempts because recursive next-hop failures are a frequent BGP fault, though the table would then omit the prefix.
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 Neighbor Adjacency and Basics
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.
Key term
OSPF Special Area Types
OSPF special area types are configurations within an OSPF network that limit the type of routing information shared across an area to reduce routing table size and processing overhead.
About these practice questions
One of 1,401 original 300-410 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more way this is tested on 300-410
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. 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?
medium- A.The route is not being advertised to any BGP peer.
- B.The route is missing the required Route Target community.
- ✓ C.The route is functioning correctly with no issues.
- D.The route has an incorrect label binding.
Why C: 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.
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.