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>> Versa Networks VNX301最新考題 <<
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問題 #20
As an administrator, you are migrating your legacy WAN to Versa Secure SD-WAN without changing the underlay network. You need to ensure that, during the migration process, legacy WAN sites are allowed to communicate with SD-WAN branches. Which two steps should be implemented to accomplish this task?
(Choose two.)
答案：C,D
解題說明：
The correct answers are B and C . During a migration from a legacy WAN, such as MPLS Layer 3 VPN, to Versa Secure SD-WAN, an SD-WAN gateway is used to allow communication between SD-WAN-enabled branches and legacy WAN sites. Versa SD-WAN design guidance states that an SD-WAN gateway allows sites connected to the SD-WAN VPN network to communicate with sites connected to a legacy MPLS VPN network. It also explains that this gateway facilitates route exchange between the MPLS underlay network and the SD-WAN VPN network, typically using a dynamic routing protocol such as BGP.
For this design, the hub or gateway must be configured with the Gateway option for the underlay transport so it can act as the interconnect point between the legacy and SD-WAN domains. Versa documentation further describes configuring a BGP peering session on the MPLS transport VR of the gateway to exchange routes from the MPLS provider to the SD-WAN network, and notes that Director Workflows can automate this configuration. Spoke-to-Spoke-Direct is not sufficient for legacy interconnect, and SD-WAN traffic steering policies do not advertise routes.
問題 #21
Examine the exhibit below.
You are configuring Class of Service on a WAN-facing network interface, and you want to perform DSCP rewrite on the packets that are forwarded to the WAN.
However, you are not able to turn on DSCP rewrite.
Referring to the exhibit, what is the cause of this issue?
答案：B
解題說明：
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.
問題 #22
A branch uses a template variable for the WAN VLAN ID. During deployment, Branch-A receives VLAN
100 and Branch-B receives VLAN 200 from device bind data while using the same template. Which statement is correct?
答案：B
解題說明：
The correct answer is A . Versa template-based provisioning is designed to separate common configuration from site-specific values. A device template can define common interface, service, routing, and SD-WAN behavior, while variables and device bind data provide unique values for each appliance. This allows the same template to be reused across many branches while assigning different WAN IP addresses, gateways, VLAN IDs, circuit names, or other per-site parameters during onboarding.
In this scenario, Branch-A and Branch-B use the same template but receive different WAN VLAN IDs from bind data. That is normal and expected in a scalable SD-WAN deployment. Without variables, administrators would need to create a separate template for every site, which would be operationally inefficient and increase configuration drift.
The Controller does not automatically rewrite VLAN IDs after IPsec comes up; VLAN IDs must be part of the generated device configuration. It is also not required to duplicate the device template for each branch. The correct Versa design is reusable templates plus unique bind-data values.
問題 #23
You are configuring a CGNAT rule for branch internet access and want to verify which access-list entry will match traffic before translation. Which information is shown by the CGNAT ACL command?
答案：A
解題說明：
The correct answer is A . Versa CGNAT troubleshooting documentation shows the command show cgnat acl info < tenant-id > for viewing CGNAT access lists used for traffic matching. The example output includes columns such as ACL handle , RuleId , Category , Precedence , VRF , Source IP , and Destination IP . It also shows tenant ID and total filters.
This command is useful when a CGNAT rule exists in configuration but sessions are not being translated. By checking the ACL output, the administrator can confirm whether the correct source prefix, destination prefix, VRF, and rule precedence are actually programmed in the dataplane. If the wrong VRF or subnet is shown, the rule may never match the intended traffic.
System uptime and CPU usage are operational health indicators. SLA metrics are SD-WAN path- quality values. BGP AS path and local preference are routing attributes. None of these directly show CGNAT access-list match programming.
問題 #24
A branch device is stuck after staging. The Controller does not show the expected branch lifecycle notification. Which statement best describes the role of MP-BGP in the provider organization for this process?
答案：C
解題說明：
The correct answer is A . Versa branch troubleshooting documentation states that the provider organization should have MP-BGP configured for SD-WAN deployments so that notifications for all relevant branch events are delivered to the Versa Director node. This is significant during onboarding because branch lifecycle events, such as branch-connect and branch-disconnect, help Director determine where the branch is in the staging process and whether the next configuration push should occur.
MP-BGP does not replace IKE or IPsec. The branch still establishes IKE/IPsec to the staging server or Controller depending on the staging phase. MP-BGP also has nothing to do with URL filtering category updates. While BGP can be used in LAN or WAN routing designs, the specific issue described here concerns provider-organization SD-WAN control-plane event delivery.
Therefore, if branch lifecycle events are not appearing properly, validating provider-organization MP- BGP configuration is part of the correct troubleshooting workflow, especially in addition to checking data-path and IPsec connectivity.
問題 #25
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