mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to troubleshoot a…
A network engineer runs the following command to troubleshoot a VRF-Lite issue:
R1# show ip route vrf CUSTOMER_A summary
Output:
IP routing table name: CUSTOMER_A (0x00000001) IP routing table maximum-paths: 32
Route Source Networks Subnets Replicates Overhead Memory (bytes) connected 2 0 0 0 576 static 1 0 0 0 288 eigrp 100 3 0 0 0 864 Internal 3 0 0 0 864 External 0 0 0 0 0 ospf 200 0 0 0 0 0 Intra-area 0 0 0 0 0 Inter-area 0 0 0 0 0 External-1 0 0 0 0 0 External-2 0 0 0 0 0 NSSA-1 0 0 0 0 0 NSSA-2 0 0 0 0 0 bgp 65000 0 0 0 0 0 Internal 0 0 0 0 0 External 0 0 0 0 0 Total 6 0 0 0 1728
What does this output indicate?
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 CUSTOMER_A has 6 routes, with EIGRP 100 providing 3 internal routes.
The 'show ip route vrf summary' command displays the routing table summary for a specific VRF. It shows the number of routes from each routing protocol source. In this output, the VRF CUSTOMER_A has 6 total routes: 2 connected, 1 static, and 3 from EIGRP 100. OSPF and BGP have 0 routes, indicating they are not contributing to the VRF's routing table.
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 CUSTOMER_A has 6 routes, with EIGRP 100 providing 3 internal routes.
Why this is correct
Correct. The summary shows 6 total routes, with EIGRP 100 contributing 3 internal routes.
- ✗
The VRF CUSTOMER_A has 6 routes, all redistributed from BGP 65000.
Why it's wrong here
Incorrect. BGP 65000 shows 0 routes, so no BGP routes are in the VRF.
- ✗
The VRF CUSTOMER_A has 6 routes, with OSPF 200 providing 3 external routes.
Why it's wrong here
Incorrect. OSPF 200 shows 0 routes, so no OSPF routes are in the VRF.
- ✗
The VRF CUSTOMER_A has 6 routes, all from connected and static only.
Why it's wrong here
Incorrect. There are also 3 EIGRP routes, not just connected and static.
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
Introduction to ENARSI Exam and Network Fundamentals
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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Same concept, more angles
2 more ways 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 R1: R1# show ip route vrf BLUE 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, H - NHRP, l - LISP a - application route + - replicated route, % - next hop override Gateway of last resort is not set 10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks C 10.1.1.0/24 is directly connected, GigabitEthernet0/0 C 10.1.2.0/24 is directly connected, GigabitEthernet0/1 O 10.2.0.0/16 [110/20] via 10.1.1.2, 00:00:15, GigabitEthernet0/0 Based on this output, what is the problem?
hard- A.The OSPF route 10.2.0.0/16 has a next hop of 10.1.1.2, which is unreachable.
- ✓ B.The OSPF route was learned 15 seconds ago, indicating a recent flap.
- C.The VRF BLUE has no default route, which is a problem.
- D.The connected routes are not in the routing table.
Why B: The output shows VRF BLUE's routing table with two connected routes and one OSPF route (10.2.0.0/16) that was learned only 15 seconds ago. In a stable network, routes are not updated that frequently; this recent installation indicates that the route experienced a recent change (a flap). This could be due to an unstable OSPF neighbor or intermittent connectivity. Therefore, the problem is a flapping route. Option A is incorrect because the next hop 10.1.1.2 is reachable via the directly connected GigabitEthernet0/0 interface (the OSPF route's outgoing interface). Option C is incorrect because VRF BLUE does not require a default route; the absence is not inherently a problem. Option D is incorrect because both connected routes are present in the table.
Variation 2. A network engineer runs the following command on Router R1: R1# show ip route vrf RED 192.168.1.0 Routing entry for 192.168.1.0/24 Known via "connected", distance 0, metric 0 (connected, via interface) Routing Descriptor Blocks: * directly connected, via GigabitEthernet0/2 Route metric is 0, traffic share count is 1 Based on this output, which statement is correct?
easy- A.The route is learned via OSPF.
- B.The route is a static route.
- ✓ C.The route is directly connected via GigabitEthernet0/2.
- D.The route has a metric of 1.
Why C: The output shows the route for 192.168.1.0/24 in VRF RED is a connected route via GigabitEthernet0/2. This is normal.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.