VNX301 Versa Certified SD-WAN Specialist (VNX300) Questions and Answers

The correct answer is C . Versa documentation states that for Releases 22.1.3 and later , the speed test factors in network latency to derive results. In these releases, the speed test is performed in three stages : a ping test, an upload test, and a download test. The ping test calculates link latency, and the speed test uses that latency data while performing the upload and download portions.

The same documentation notes that the speed test can measure bandwidth speeds up to 1 Gbps, with actual measurement depending on factors such as in-path shapers and latency. It also states that the test may use up to 45 MB of data per upload or download in the best case and 90 MB for a complete test.

Older releases behave differently. For Releases 21.2 and earlier, the speed test is performed in two stages: upload and download. Therefore, because the question specifically states Release 22.1.3 on both client and server, the correct sequence is ping, upload, and download.

The correct answer is A . Versa SD-WAN data-path troubleshooting documentation shows the VSM local-tunnel-site output and includes a legend in which BN means Behind NAT . In the WAN local link details, the output also displays a field named WAN lcl link behind NAT , with values such as 1 or 0, and link flags including [ BN CT PT SLA-P ] when the WAN link is behind NAT.

This information is important because NAT status affects how SD-WAN tunnel endpoints are discovered and how public and private transport addresses are represented. The same output includes both public and private WAN link addresses, making it useful for troubleshooting sites behind NAT, stale tunnel endpoints, or incorrect public-address learning.

WAN lcl vrf-id identifies the local transport routing instance ID, not NAT status. Tenant ID identifies the tenant context. Neighbour site type identifies whether the remote endpoint is a Controller, hub, or SD-WAN site. None of those fields specifically confirms whether the local WAN transport is behind NAT.

The correct answers are A and D . Versa stateful firewall service includes classic firewall functions that track sessions and enforce traffic policy, and it can work with DoS policy enforcement. Versa’s CLI guide includes Configuring DoS policies under the security configuration area, where DoS rules can match on source, destination, services, applications, URL category, IP version, DSCP, TTL, EtherType, and other packet or session attributes, and can then apply aggregate or classified DoS profiles. This validates DoS protection as a stateful firewall/security service capability.

Application-Level Gateways, or ALGs , are also associated with stateful firewall/NAT behavior because they inspect and assist protocol handling for applications that embed addressing or dynamic port information inside the payload or control channel. This is part of traditional stateful firewall service behavior rather than UTM content inspection.

The correct action is to update the WAN gateway IP address in Device Bind Data and onboard the branch appliance again. Device Bind Data supplies site-specific values, such as WAN interface addressing and gateway information, that are merged with the workflow and template configuration during onboarding. If the wrong WAN gateway is entered, the branch may activate successfully from a workflow perspective, but the resulting WAN routing configuration is incorrect. As a result, the branch cannot establish proper transport reachability to the Controller. Versa troubleshooting documentation explains that, after establishing transport connectivity from a branch to a Controller, at least one WAN interface must be available, and the branch then establishes IKE-based IPsec connectivity to the Controller. If that IKE/IPsec connectivity fails, the Controller-facing ptvi interface remains down.

Changing the configuration only from the Appliance context is not the best answer because the incorrect value originated in the bind-data source used for provisioning. Modifying it manually from the branch CLI is also not recommended because the device is managed by Versa Director and template-driven configuration. Resetting the device does not automatically discover or “ping” the correct gateway. The correct remediation is to fix the bind data and repeat onboarding so the branch receives the correct generated configuration.

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.

The correct answer is B . Versa documentation describes checking for asymmetrical SD-WAN paths when troubleshooting bandwidth and throughput issues. It gives the example of traffic being transmitted on one transport network and returning on another transport network that has different bandwidth. To check whether traffic is traversing an asymmetrical SD-WAN path, Versa recommends using show orgs org organization-name sessions sdwan brief.

In that output, the key fields are RX WAN CKT and TX WAN CKT . If the SD-WAN paths are symmetrical, the circuits shown in the RX and TX WAN circuit fields must be the same on the local and remote sites. If traffic goes out over Internet and returns over MPLS, throughput may differ depending on the bandwidth and quality of each circuit.

Source and destination zones are security-policy concepts, while BGP local preference and MED are routing attributes. Tenant ID and VSN ID identify context, but they do not directly prove directional WAN-circuit asymmetry.

The correct answer is B . The exhibit shows the branch interface summary in Versa Director with a Live Data column. To populate real-time bandwidth graphs for WAN circuits, the administrator must select Live Data for the WAN interfaces that need to be monitored. Versa monitoring documentation states that, from a Director node, you can monitor VOS devices and organizations, and that Director, together with Versa Analytics, can poll VOS devices in real time to understand what is happening on the devices. This real-time information can be displayed to assist with troubleshooting.

Because the question asks for the current bandwidth of each WAN circuit, historical analytics alone is not sufficient. The dashboard must poll live statistics from the selected WAN circuits. In the exhibit, not all WAN interfaces appear to have Live Data selected; therefore, the graph is not populated for all circuits. Refreshing the page does not enable polling and will not solve the missing data condition. Selecting only MPLS would populate only the MPLS circuit, not all WAN circuits. Unselecting and reselecting only the INET circuit would affect only that one interface. Therefore, Live Data must be selected for all WAN circuits whose current bandwidth should be displayed.

The correct answers are B and D . In the exhibit, the Next-Hop Selection Method is configured as Load Balance , and both INET and INET-2 have the same next-hop priority value of 1 . Versa SD-WAN guidance states that load balancing between WAN paths is achieved by configuring at least two circuits with equal priority. Therefore, when both INET and INET-2 satisfy the SLA requirements, sessions can be load-balanced across those two internet circuits.

Option D is also correct because the exhibit shows SLA Violation Action: Forward . This means that if no next hop is SLA-compliant, the VOS device is still allowed to forward traffic instead of dropping it. This behavior is consistent with Versa SD-WAN traffic-steering concepts, where forwarding profiles define circuit or path priorities, connection methods, load-balancing behavior, and SLA handling for traffic that matches an SD-WAN policy.

Option A is incorrect because the exhibit does not use the Automatic next-hop selection method. Versa’s performance-based SaaS optimization uses monitoring metrics to select the best path when configured for automatic/performance-based selection, but this exhibit shows Load Balance instead. Option C is not the best answer because LTE has lower priority 2 and would be considered only after the higher-priority INET and INET-2 paths are unavailable or unusable, not merely when one INET circuit fails.

The correct answer is B . In Versa SD-WAN onboarding, the branch progresses through three staging phases. In Stage 1 , the branch uses its factory-default configuration to start an IKE session with the staging server. After the IKE session comes up, the staging server assigns an IP address to the branch and notifies the branch of the Versa Director IP address. Versa Director is also notified that the branch has come up.

In Stage 2 , Versa Director pushes the stage-two configuration to the branch through the staging server. This stage changes the IPsec profile so that the Controller IP address becomes the remote IP. The branch reboots and then attempts to establish the IKE session with the Controller. If the device successfully completed Stage 1 but never forms the Controller IKE session, the failure point is Stage 2.

Stage 3 is later, when the device receives stage-three configuration, becomes operational, and creates Controller IPsec plus branch-to-branch VXLAN/ESP sessions. Therefore, the described issue is a Stage 2 staging failure.

In the exhibit, the Add Associate Interface/Network window has Interface selected, and the interface name is set to vni-0/0 . The DSCP rewrite option is not available because rewrite behavior is intended to be applied at the network association level for the WAN network, not directly while associating only the physical/logical interface. For WAN-facing CoS, the scheduler and shaping parameters can be attached to an interface, but DSCP rewrite policies are applied to remark traffic as it exits through a network context.

Versa SD-WAN design documentation explains that QoS rewrite rules rewrite packet QoS attributes as packets leave the VOS device, and that rewrite rules can modify IEEE 802.1p bits, IPv4 TOS/DSCP bits, and IPv6 traffic class bits. It also explains that a rewrite policy is commonly applied on a WAN network to remark traffic based on the forwarding class and loss priority assigned by QoS or App QoS policies. In the design example, Versa explicitly describes applying a QoS propagation or rewrite policy on the MPLS WAN network to remark traffic to a DSCP value. Therefore, the issue is the association type: it is set to Interface, not Network.

The exhibit shows the Add CGNAT Pool configuration with the IP Address/Range option selected. The configured address range is named Visitors , with a low address of 192.168.10.100 and a high address of 192.168.10.150 . In CGNAT, this pool defines the translated source address resource used by matching NAT rules; it does not define the original inside source hosts. Therefore, matching sessions will have their source address translated to an address from this configured pool range, which makes option C correct. Versa’s CGNAT configuration examples show that a rule matches original source and destination prefixes, and then attaches a translated source pool to perform NAT.

The correct answer is A . Versa SD-WAN data-path troubleshooting documentation instructs administrators to connect to the VSM control plane with vsh connect vsmd and then use show vsm p2mp local-tunnel-sites 0 to check the status of local site objects. The example output includes the local site key, neighbor IP, site type, site name, branch ID, tenant ID, and detailed WAN link information. It also shows fields such as WAN local VRF ID, WAN local link name, circuit information, link ID, behind-NAT status, shaping rate, public and private addresses, link flags, transport domain, and SLA interval.

This command is therefore highly relevant when validating whether the local SD-WAN site has learned and built the correct WAN transport objects for overlay tunnel creation. If a circuit is mapped to the wrong transport domain or has incorrect NAT/public/private address state, the local-tunnel-site output is one of the best places to confirm it.

The other commands are useful for software version, CGNAT summary, or CPU usage, but they do not show the detailed SD-WAN local tunnel-site transport mapping.

The correct answer is B . In the exhibit, Versa Director shows multiple branch interfaces and a Live Data column. To populate the bandwidth graph with current real-time statistics for all WAN circuits, Live Data must be selected for each WAN circuit that should be monitored. Versa documentation states that from a Director node, administrators can monitor VOS devices, provider organizations, tenants, events, and alarms. It also explains that Versa Director, together with Versa Analytics, can poll VOS devices in real time to provide visibility into what is happening on those devices and to assist with troubleshooting.

Because the requirement is to find the current bandwidth of each WAN circuit, simply refreshing the page is not enough. Refreshing only reloads the dashboard; it does not enable real-time polling for interfaces that are not selected. Selecting Live Data only for MPLS circuits would populate only MPLS-related data and would not satisfy the requirement for all WAN circuits. Unselecting and reselecting only the INET circuit affects only that one circuit. Therefore, the correct operational step is to enable Live Data for all WAN circuits shown in the branch interface dashboard.

Comprehensive and Detailed 150 to 250 words of Explanation From Versa Networks SDWAN Topics:

The correct answers are B and D . In the exhibit, Enable Auto Switchover is not selected. However, the Failover Timeout value is configured as 300 seconds . Versa Director HA documentation states that the Failover Timeout is the timeout period before the standby Director node can promote itself to become the active Director node. Therefore, if the active or primary Director fails, the backup Director can automatically assume the active role after the failover condition and timeout are met.

The important distinction is that Auto Switchover controls revertive behavior after recovery, not the initial standby takeover during failure. Versa documentation explains that Director HA is non-revertive by default. This means that when the designated master or primary Director comes back online after recovery, it is not automatically promoted back to active unless automatic switchover is enabled. To make the designated active Director automatically reclaim the active state after recovery, Enable Auto Switchover must be selected and the Auto Switchover Timeout must expire.

The correct answer is B . Versa documentation for internet speed tests explains that when you run an internet speed test from a Director node, it creates approximately 200 sessions . This is useful for measuring aggregate throughput, but it does not represent the behavior of a single application flow. The same documentation states that you can run a speed test with a single session from the device CLI, and that this is useful for simulating file transfer rates when using SCP or FTP .

Therefore, when the goal is to understand how a single file transfer behaves, the CLI-based single-session test is the best option. A default Director-based test may produce higher aggregate results because multiple sessions can use parallelism and better fill the pipe.

show interfaces brief is useful for interface status and addressing, but it does not measure file-transfer throughput. SLA latency is useful for path-quality monitoring, but latency alone does not show single-session TCP throughput.