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| Certification Vendor: | Versa Networks |
|---|---|
| Exam Name: | Versa Certified SD-WAN Specialist |
| Exam Number: | VNX301 |
| Exam Duration: | 90 minutes |
| Exam Price: | USD 250 |
| Exam Format: | Multiple Choice, Multiple Select |
| Real Exam Qty: | 60 |
| Passing Score: | 70% |
| Available Languages: | English |
| Related Certifications: | Versa Certified SD-WAN Expert |
| Certificate Validity Period: | 3 years |
| Sample Questions: | Versa Networks VNX301 Sample Questions |
| Exam Way: | Online proctored exam at Pearson VUE test centers |
| Pre Condition: | Recommended: Basic networking knowledge (CCNA/equivalent), familiarity with WAN technologies and enterprise network design |
| Official Syllabus URL: | https://www.versa-networks.com/partners/training-certification.html |
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48. Frage
Examine the CLI output in the exhibit.
You are reviewing the OSPF adjacency on a VOS CPE, and the output is shown in the exhibit. In this scenario, what is the probable cause of the OSPF adjacency issue?
Antwort: D
Begründung:
The correct answer is B . The exhibit shows the OSPF neighbor in the exst state, which means Exchange Start . Versa documentation lists the OSPF neighbor state codes and identifies exst as "exchange start," followed by exchange, loading, and full. In normal OSPF adjacency formation, neighbors progress through initialization and two-way communication before they negotiate database exchange. If the neighbor becomes stuck in ExStart or Exchange, a common and highly probable cause is an MTU mismatch between the two OSPF peers. During database description packet negotiation, the peers must agree on parameters that allow LSDB exchange; an MTU mismatch can prevent the adjacency from advancing to Full.
Option A is less likely because an area mismatch usually prevents the neighbor relationship from forming correctly rather than leaving it stuck in ExStart. Option C is also incorrect because the neighbor has already progressed beyond early states, which indicates that bidirectional communication has occurred. Option D is not the best answer because dropping OSPF multicast 224.0.0.5 would typically prevent discovery or keep the adjacency in an earlier state, not specifically in ExStart.
Therefore, the probable cause is an interface MTU mismatch.
49. Frage
A branch has correct underlay speed and no asymmetric SD-WAN paths, but users still report packet loss during large transfers. You suspect QoS shaping is dropping traffic. Which command is most appropriate to verify interface-level CoS drops?
Antwort: A
Begründung:
The correct answer is A . Versa throughput troubleshooting documentation includes a specific section titled Check that Packets Are not Dropped by CoS . It states that if a CoS shaper or rate limiter is configured on the VOS device, it may drop packets when traffic exceeds the configured shaping rate. To check whether CoS is dropping packets, Versa recommends commands including show class-of-services interfaces brief and show class-of-services interfaces detail interface-name.
The detailed interface output displays traffic statistics such as TX packets, TX packets dropped, TX bytes, TX bytes dropped, and per-traffic-class drops. This is exactly the evidence needed to confirm whether shaping or QoS enforcement is causing the observed loss.
show alarms last-n 10 may reveal major events but will not provide per-interface CoS drop counters.
show system uptime only indicates how long the system has been running. show cgnat tenants is relevant for NAT state and tenant CGNAT resources, not QoS drops.
50. Frage
While troubleshooting the SD-WAN data path, you run show vsf tunnel access-circuits ... detail and see the following encapsulation chain: VMLH, MPLS-over-GRE, IPsec-ESP, and VXLAN. What does this output primarily confirm?
Antwort: A
Begründung:
The correct answer is B . Versa's SD-WAN data-path troubleshooting documentation shows that show vsf tunnel access-circuits ... detail can display the access-circuit state and encapsulation chain used for tunnel forwarding. In the example, the output lists multiple encapsulations, including VMLH , MPLS-over-GRE , IPsec-ESP , and VXLAN . It also shows transport details such as source IP, destination IP, UDP transport, tunnel MTU, SPI values, and SLA state.
This confirms that the VOS data plane has built the SD-WAN tunnel encapsulation stack required to forward overlay traffic across the underlay. IPsec-ESP in the chain indicates encrypted tunnel handling, while VXLAN and other encapsulation components are part of the SD-WAN overlay forwarding structure.
The output does not indicate simple bridging, plain-text-only GRE, or bypass of the VOS data plane.
Instead, it proves that the packet path is being processed through the VOS tunnel forwarding framework and that the administrator is looking at the SD-WAN access-circuit tunnel state.
51. Frage
You need to quickly check interface administrative status, operational status, tenant ID, VRF, MAC address, and IP address on a VOS device. Which command should you use?
Antwort: D
Begründung:
The correct answer is A . Versa's handy CLI command reference lists show interfaces brief as the command used to view a list of interfaces along with their MAC addresses, operational and administrative status, tenant ID, VRF, and IP addresses. This is one of the first commands administrators run when validating device bring- up, staging interface assignment, WAN/LAN mapping, or whether a template applied interface addressing as expected.
For deeper interface troubleshooting, show interfaces detail provides additional information such as interface index, host interface, MTU, speed and duplex settings, RX/TX errors, and bridge information. However, for a quick overview of state and addressing across interfaces, show interfaces brief is the correct choice.
show system package-info identifies the running VOS software package. show system storage reports system storage resources. show coredumps shows generated core files. These are valuable operational commands, but they do not provide the requested interface status and addressing summary.
52. Frage
Examine the exhibit below.
Referring to the exhibit, which two statements are correct? (Choose two.)
Antwort: A,B
Begründung:
The correct answers are A and B . In the exhibit, the LAN interface shows a fixed VLAN ID value of 100 .
Because this value is directly configured in the template rather than represented as a per-device variable, every branch that uses this template will receive the same LAN VLAN ID. This supports option A. Versa configuration examples show that VLAN-tagged interfaces are created by defining logical units with a vlan- id, and organizations then use those tagged interfaces for traffic identification and routing services.
For the MPLS WAN network , the VLAN ID field is shown as a variable or bind-data style value rather than a fixed number. This allows each branch device to receive a different MPLS VLAN ID during onboarding, depending on the branch-specific values supplied in the workflow or device bind data. Therefore, branches can have separate VLAN IDs on the MPLS WAN transport, which supports option B. Versa SD-WAN troubleshooting output also shows WAN interfaces as logical VNI subinterfaces, such as vni-0/1.0 and vni-0/2.
0, mapped to SD-WAN transport networks like INET and MPLS.
Option C is incorrect because an INET interface can be untagged, commonly represented with VLAN ID 0. Option D is incorrect because the MPLS VLAN field is intentionally parameterized, not incorrectly configured.
53. Frage
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VNX301 Testengine: https://www.zertpruefung.ch/VNX301_exam.html