Free VNX301 Practice Test Questions and Answers (2026)

The requirement is to drop traffic for a specific application if no path meets the required Service Level Agreement (SLA). This behavior is controlled within a Versa Forwarding Profile. The "SLA Violation Action" parameter within the Forwarding Profile dictates the action to be taken when all available paths for a traffic class fail to meet the criteria defined in the associated SLA Profile. Setting this action to "Drop" ensures that traffic is discarded rather than being forwarded over a degraded, non-compliant path, thereby protecting the application from poor performance.

B. "Nexthop Failure Action" applies when a circuit fails completely (e.g., link down), not when it is up but performing poorly (SLA violation).

C. "Header Compression" is a WAN optimization feature that reduces packet overhead. It does not influence traffic forwarding decisions based on SLA compliance.

D. "Recompute Timer" defines the frequency for re-evaluating the best path. It does not control the action taken when no suitable path is found.

1. Versa Networks, "Secure SD-WAN Configuration Guide, Release 21.2.2", Document Version 1.0, July 2022. Section: "Configuring Forwarding Profiles," pp. 545-548. This section explicitly describes the "SLA Violation Action" parameter and lists "Drop" as an option to discard traffic when no paths meet the SLA.

2. Versa Networks, "Application-Aware Traffic Steering Design and Implementation Guide," Release 20.2. This guide details the logic of traffic steering, explaining that the Forwarding Profile's SLA Violation Action is the key mechanism to enforce strict performance requirements by dropping traffic when necessary.

During zero-touch provisioning the port listed in the staging script must match the physical WAN interface expected by the controller bootstrap. Declaring the wrong port leaves the interface down/un-addressed, so no default-route is installed and the IPsec control tunnel never forms, preventing the device from receiving its Versa-Provider-Controller-VR IP.

A. Controller address is only contacted after tunnel forms; mismatch would still permit a local IP.

B. Gateway must share subnet, but the device never gets an IP at all when port is wrong.

C. Serial corruption is detected earlier; it does not stop interface bring-up.

1. Versa Networks, Branch On-Boarding Guide R21.1, §3.1 “Preparing the Staging Script”, pp. 18-19.

2. Versa Networks, SD-WAN Deployment Guide, Doc ID DEP-BR-004, Table 4-2 “Typical Tunnel-up Failures – Incorrect Interface Mapping”.

The BGP LOCALPREF (Local Preference) attribute is used to influence outbound traffic path selection within a single Autonomous System (AS). It is communicated between iBGP peers and is not advertised to eBGP peers. By setting a higher LOCALPREF value for routes learned from the preferred service provider (SP1, AS 64515) compared to the other (SP2, AS 64519), all routers within your AS (64514) will choose the path through SP1. The BGP path selection algorithm considers LOCALPREF before other attributes like ASPATH length or MED, making it the standard tool for this purpose.

A. The BGP MULTIEXITDISC (MED) attribute is used to influence how a neighboring AS sends traffic into your AS, not for selecting your own outbound path.

B. The BGP ORIGIN attribute indicates how a route was introduced into BGP (e.g., from an IGP) and is a less preferred attribute in the decision process.

D. The BGP NEXTHOP attribute simply identifies the IP address of the next router along the path; it is not used to express a preference for a path.

1. Versa Networks, "Configuring IP Routing," Document Version 22.2, Chapter "Configuring BGP," Section "BGP Path Selection," p. 91. (Describes the BGP decision process where LOCALPREF is evaluated before ASPATH, ORIGIN, and MED).

2. RFC 4271, "A Border Gateway Protocol 4 (BGP-4)," Section 9.1, "Decision Process". (Defines the standard BGP path selection algorithm, prioritizing Local Preference for path selection within an AS).

When troubleshooting CGNAT, it is essential to verify that the traffic selectors, defined by an access control list (ACL), are correctly programmed in the data plane. The show cgnat acl info command is the specific diagnostic tool for this purpose. It displays the configured source and destination prefixes that the CGNAT engine uses to match traffic for translation. If the expected prefixes do not appear in the command's output for the correct tenant and rule, it confirms a configuration issue is preventing traffic from being matched and translated.

B. show system status: This command provides a high-level overview of the system's health and resource utilization, not specific CGNAT ACL details.

C. show device clients: This command is used to view information about connected end-user devices, which is irrelevant to CGNAT policy verification.

D. show system storage: This command displays information about the device's disk usage and partitions, not network address translation rules.

1. Versa Networks, "VOS CLI Reference Guide, Release 21.2.2", Section: "show cgnat acl info". The guide describes this command as the tool to "Display information about CGNAT ACLs," which is precisely what is needed to validate the programmed prefixes for a CGNAT rule.

2. Versa Networks, "Carrier-Grade NAT (CGNAT) Configuration Guide, Release 21.2.2", Section: "Monitoring and Troubleshooting CGNAT". This section lists show cgnat acl info as a key command for verifying the operational state and configuration of CGNAT access lists.

The show vsm p2mp tunnel-remote-endpoint command is executed on the Versa Controller to display the remote site information learned for SD-WAN overlay tunnels. This command's output shows the remote endpoint's IP address, the site ID, and the source from which this information was learned (e.g., BGP or static configuration). This directly addresses the need to verify if the Controller has successfully learned the necessary remote endpoint objects required for a branch to establish its overlay tunnels. Without this information on the Controller, the branch will not receive the required control plane messages to build tunnels to other sites.

B. show interfaces brief: This command displays the status of local physical and logical interfaces on a device, not the SD-WAN control plane state for remote sites.

C. show system storage: This command shows disk partition usage and storage information, which is unrelated to SD-WAN tunnel formation or control plane learning.

D. show orgs org-services cgnat summary: This command is used for troubleshooting Carrier-Grade NAT services and has no relevance to learning SD-WAN remote endpoints.

Versa Networks, "VOS™ CLI Reference Guide, Release 21.2.2", Page 1188. The guide details the show vsm p2mp tunnel-remote-endpoint command, specifying its use for displaying P2MP tunnel remote endpoint information learned by the VSM daemon.

In a Versa Networks DoS Protection Profile, there are typically three thresholds: Activate, Max, and Drop. The "Max Rate" threshold defines the maximum allowable packet rate for a specific traffic flow. When traffic exceeds this "Max Rate" but has not yet reached the "Drop Rate," the system begins mitigation by randomly dropping packets. This action effectively rate-limits the traffic to conform to the configured policy. Therefore, if the "Max Rate" for TCP is set to 7000 packets per second, any traffic exceeding this rate will be subject to random drops.

A. An alarm is typically generated at the lower "Activate" threshold. At 7000 pps, a more active mitigation (dropping packets) is expected.

C. Packets are completely dropped only when the traffic rate exceeds the highest "Drop Rate" threshold, which would be configured at a value greater than the "Max Rate."

D. If 5000 pps were the "Drop Rate" threshold, then traffic at 7000 pps would also be completely dropped, but the exhibit implies a different action at 7000 pps.

Versa Networks, "Versa Secure SD-WAN Security Configuration Guide," Release 21.2.2, Chapter: "Security Services," Section: "DoS Protection," Subsection: "Configuring DoS Protection Profiles." This documentation defines the behavior of the Max Rate (pps) parameter as the threshold at which random packet dropping begins for rate-limiting purposes.

The configuration shows a CGNAT pool of type "Dynamic Port Address Translation." This means that for any matching session, both the source IP address and the source port will be translated. The source IP is translated to an available address from the defined pool (192.168.10.100 to 192.168.10.150). The source port is translated to a dynamic, high-range port to ensure that multiple internal hosts can share the same public IP address simultaneously without conflict. The associated rule applies this translation to all traffic (Source Address: any) from the lan-vrf to the wan-vrf.

A. The pool type is explicitly "Dynamic Port Address Translation," which confirms that port translation is a key part of the function.

B. This range is the destination pool for the translation (the "post-NAT" addresses), not the source address range that triggers the translation.

1. Versa Networks, "VOS™ Carrier-Grade NAT (CGNAT) Configuration Guide, Release 22.1," Document ID: VOS-CGNAT-CG-22.1, Section 2.3: "Configuring Dynamic Port Address Translation," pp. 25-28. (This section details how this NAT type translates both IP and port).

2. Versa Networks, "Configuring NAT Policies," Versa Academy VNX301 Courseware, Module 7: "Security Services," Topic: "CGNAT Configuration," Slides 8-10.

Asymmetric routing occurs when traffic for a single session takes different paths in the forward and reverse directions. To confirm this for a specific flow, an administrator needs to see the transmit and receive paths. The RX WAN CKT (Receive WAN Circuit) and TX WAN CKT (Transmit WAN Circuit) fields in the session table output (e.g., from show orgs org sessions) directly identify the underlay circuits used for the incoming and outgoing traffic of that session. If these fields show different circuits (e.g., 'MPLS' and 'Internet'), it definitively confirms the asymmetry.

A. Source zone and destination zone. These fields identify security zones for policy enforcement and do not specify the physical WAN circuit used for transit.

C. Local preference and MED. These are BGP routing attributes that influence path selection but do not directly show the resulting path taken by a specific traffic flow in the session table.

D. Tenant ID and VSN ID. These identifiers are used for multi-tenancy and network segmentation, not for tracking the specific WAN path of a session.

1. Versa Networks, VOS™ CLI Reference Guide, Release 22.1.3, "show organizations organization sessions" command description. The guide details the output fields, including Tx Wan Ckt Name and Rx Wan Ckt Name, which explicitly show the transmit and receive circuits for a session, making them ideal for diagnosing asymmetric routing.

2. Versa Networks, VOS™ Configuration Guide, Release 22.1, "Monitoring Live Sessions" section. This section describes how to use the session monitoring tools in Versa Director and CLI to view flow details, including the ingress and egress paths.

In Versa Director, the monitoring dashboards for branch sites do not display real-time data by default to conserve resources. To view live statistics such as bandwidth utilization for WAN circuits, the administrator must explicitly enable this feature. The exhibit shows the "Live Data" checkboxes for both the MPLS and INET circuits are unchecked. Selecting the "Live Data" checkbox for all relevant WAN circuits will initiate a live data stream from the branch appliance to Versa Director, which then populates the corresponding graphs with current information.

A. Refreshing the page only reloads the dashboard's static elements; it does not activate the live data feed required to populate the graphs.

C. Selecting "Live Data" for only the MPLS circuit would not populate the graph for the INET circuit, failing to meet the requirement for all circuits.

D. Toggling the setting for a single circuit will not enable monitoring for the other circuits that are also not displaying data.

Versa Networks, "Versa Director Administrator Guide," Version 22.2.1, Chapter: Monitor, Section: Monitoring Branch Appliance Details, pp. 215-217. (This section describes the monitoring dashboard interface, including the use of "Live Data" toggles to view real-time statistics.)

Versa Networks, "VOS™ Configuration Guide," Version 22.2.1, Part 3: Monitoring and Troubleshooting, Section: Monitoring from Versa Director. (This section details the procedures for viewing live and historical data, emphasizing that live views must be actively enabled.)

When verifying a CGNAT configuration from the Versa FlexVNF CLI, commands used to inspect Access Control Lists (ACLs) display the matching criteria for traffic. This output includes essential fields like the Rule ID, category, precedence (priority), the VRF the rule applies to, and the source and destination IP prefixes that define the traffic to be matched for translation. This information is critical for an administrator to confirm that the correct traffic is being selected by the NAT rule before translation occurs.

B. Only system uptime and CPU usage: This is system health monitoring information, completely unrelated to the contents of a network Access Control List.

C. Only SD-WAN SLA latency, jitter, and loss: These are performance metrics for SD-WAN paths and are not part of a CGNAT ACL configuration.

D. Only BGP AS path and local preference: These are BGP routing protocol attributes and have no direct relevance to the matching criteria within a NAT ACL.

1. Versa Networks, "Versa Operating System (VOS) CLI Reference Guide," Release 21.2.3, Section: "show orgs organization nat pools," pp. 1250-1252. The guide shows that inspecting NAT rules and their associated access lists displays parameters such as VRF, source, and destination addresses.