Course 2024 JN0-683 Test Prep Training Practice Exam Download
JN0-683 Exam Info and Free Practice Test Professional Quiz Study Materials
NEW QUESTION # 30
Exhibit.
You have a sample configuration for connecting two sites through EVPN-VXLAN by exchanging IP prefix routes.
Referring to the exhibit, which two statements regarding the configuration are true? {Choose two.)
- A. The VNI must match on all devices for the same customer.
- B. The advertise direct-nexthop option enables the receiver to resolve the next-hop route using only information carried in the Type 5 route.
- C. The advertise direct-nexthop option enables the receiver to resolve the next-hop route using only information carried in the Type 2 route.
- D. The VNI should be unique on all devices for each customer site.
Answer: A,B
Explanation:
EVPN-VXLAN Configuration:
* The configuration provided in the exhibit shows an EVPN-VXLAN setup where IP prefix routes are exchanged between two sites. The advertise direct-nexthop option and the VNI (Virtual Network Identifier) settings are crucial in this context.
Advertise Direct-Nexthop:
* Option A:The advertise direct-nexthop option ensures that the next-hop route is resolved using only the information carried in the EVPN Type 5 route. Type 5 routes are used for IP prefix advertisement in EVPN, which is key to enabling Layer 3 interconnectivity between different VXLAN segments.
VNI Consistency:
* Option C:For the same customer across different devices, the VNI must be consistent. This consistency ensures that all devices can correctly map traffic to the appropriate VXLAN segment, maintaining seamless Layer 2 and Layer 3 connectivity.
NEW QUESTION # 31
You are asked to deploy 100 QFX Series devices using ZTP Each OFX5120 requires a different configuration. In this scenario, what are two components that you would configure on the DHCP server?
(Choose two.)
- A. the IP address of the FTP server
- B. the management IP address for each OFX5120
- C. the MAC address of the FTP server
- D. the MAC address for each OFX5120
Answer: B,D
NEW QUESTION # 32
Exhibit.
A VXLAN tunnel has been created between leaf1and Ieaf2 in your data center. Referring to the exhibit, which statement is correct?
- A. Traffic sent from server1to server2 will be dropped on leaf1.
- B. Traffic sent from server1to server2 will be dropped on Ieaf2.
- C. Traffic sent from server1to server2 will be tagged with VLAN ID 100 on Ieaf2 and forwarded to server2.
- D. Traffic sent from server1to server2 will be tagged with VLAN ID 200 on Ieaf2 and forwarded to server2.
Answer: D
Explanation:
* Understanding VXLAN Tunneling:
* VXLAN (Virtual Extensible LAN) is a network virtualization technology that addresses the scalability issues associated with traditional VLANs. VXLAN encapsulates Ethernet frames in UDP, allowing Layer 2 connectivity to extend across Layer 3 networks.
* Each VXLAN network is identified by a unique VXLAN Network Identifier (VNI). In this exhibit, we have two VNIs, 5100 and 5200, assigned to the VXLAN tunnels between leaf1 and leaf2.
* Network Setup Details:
* Leaf1:Connected to Server1 with VLAN ID 100 and associated with VNI 5100.
* Leaf2:Connected to Server2 with VLAN ID 200 and associated with VNI 5200.
* Spine:Acts as the interconnect between leaf switches.
* Traffic Flow Analysis:
* When traffic is sent from Server1 to Server2, it is initially tagged with VLAN ID 100 on leaf1.
* The traffic is encapsulated into a VXLAN packet with VNI 5100 on leaf1.
* The packet is then sent across the network (via the spine) to leaf2.
* On leaf2, the VXLAN header is removed, and the original Ethernet frame is decapsulated.
* Leaf2 will then associate this traffic with VLAN ID 200 before forwarding it to Server2.
* Correct Interpretation of the Exhibit:
* The traffic originating from Server1, which is tagged with VLAN ID 100, will be encapsulated into VXLAN and transmitted to leaf2.
* Upon arrival at leaf2, it will be decapsulated, and since it is associated with VNI 5200 on leaf2, the traffic will be retagged with VLAN ID 200.
* Therefore, the traffic will reach Server2 tagged with VLAN ID 200, which matches the network configuration shown in the exhibit.
* Data Center References:
* This configuration is typical in data centers using VXLAN for network virtualization. It allows isolated Layer 2 segments (VLANs) to be stretched across Layer 3 boundaries while maintaining distinct VLAN IDs at each site.
* This approach is efficient for scaling large data center networks while avoiding VLAN ID exhaustion and enabling easier segmentation.
In summary, the correct behavior, as per the exhibit and the detailed explanation, is that traffic sent from Server1 will be tagged with VLAN ID 200 when it reaches Server2 via leaf2. This ensures proper traffic segmentation and handling across the VXLAN-enabled data center network.
NEW QUESTION # 33
You are deploying multiple Juniper switches al the same location. Your switches are currently using the factory-default configuration.
In this scenario, which two statements are correct? (Choose two.)
- A. The switch will try to request an IP address from a DHCP server using all interfaces that are connected and are operational.
- B. The switch will try to request an IP address from a DHCP server using only the management interface.
- C. The DHCP server configuration can provide Junos version requirements to DHCP clients.
- D. The DHCP server configuration cannot provide Junos version requirements to DHCP clients.
Answer: A,C
Explanation:
* DHCP Behavior in Factory-Default Configuration:
* Option B:In the factory-default configuration, Juniper switches are designed to send DHCP requests on all operational interfaces. This behavior ensures that the switch can obtain an IP address for management and further configuration from any available DHCP server.
* Option D:The DHCP server can provide additional configuration parameters, including the required Junos version. This allows for automated provisioning and ensures that the switch is running the correct software version.
Conclusion:
* Option B:Correct-The switch will use any operational interface to request an IP address via DHCP.
* Option D:Correct-The DHCP server can specify Junos version requirements, enabling automated software management.
NEW QUESTION # 34
You are asked for TX and RX traffic statistics for each interface to which an application server is attached.
The statistics need to be reported every five seconds. Using the Junos default settings, which telemetry method would accomplish this request?
- A. SNMP
- B. OpenConfig
- C. Native Sensors
- D. gNMI
Answer: C
Explanation:
* Telemetry Methods in Junos:
* Telemetry is used to collect and report data from network devices. For high-frequency statistics reporting, such as every five seconds, you need a telemetry method that supports this level of granularity and real-time monitoring.
* Junos Native Sensors:
* Option C:Native Sensors in Junos provide detailed, high-frequency telemetry data, including TX and RX traffic statistics for interfaces. They are designed to offer real-time monitoring with customizable sampling intervals, making them ideal for the five-second reporting requirement.
Conclusion:
* Option C:Correct-Native Sensors in Junos are capable of providing the required high-frequency telemetry data every five seconds.
NEW QUESTION # 35
Exhibit.
Referring to the configuration shown in the exhibit, assume that there is no external router present, and that the configuration is fabric-only.
Which two statements are true about the example configuration? (Choose two.)
- A. VNI 10006is assigned to vlan 800 (irb.800).
- B. Devices in routing instance Customer A are able to communicate with devices in routing instance Customer B
- C. Devices in irb.400 (vlan 400) and irb.800 (vlan 800) are able to communicate over the fabric.
- D. Devices in irb.400 (vlan 400) are not able to communicate directly with devices in routing instance Customer A.
Answer: C,D
Explanation:
* Understanding the Configuration:
* The exhibit shows configurations for two VRFs (Customer_A and Customer_B) with specific VLANs and VNIs assigned. Each VRF has interfaces (IRBs) associated with particular VLANs.
* Communication Between VLANs and Routing Instances:
* Option B:VLAN 400 (irb.400) is part of Customer_B, and there is no direct connection or routing between Customer_A and Customer_B in the configuration provided. Therefore, devices in irb.400 cannot communicate directly with devices in the Customer_A routing instance.
* Option D:Since irb.400 (VLAN 400) and irb.800 (VLAN 800) are part of the same routing instance (Customer_B), they can communicate over the fabric using VXLAN encapsulation.
Conclusion:
* Option B:Correct-There is no direct communication between devices in irb.400 (Customer_B) and routing instance Customer_A.
* Option D:Correct-Devices in VLAN 400 and VLAN 800 can communicate within the Customer_B routing instance over the fabric.
NEW QUESTION # 36
Your organization is implementing EVPN-VXLAN and requires multiple overlapping VLAN-IDs. You decide to use a routing-instance type mac-vrf to satisfy this request.
Which two statements are correct in this scenario? (Choose two.)
- A. Host-facing interfaces must be configured using enterprise-style configuration.
- B. The routing-instance service type can be VLAN-based.
- C. Spine-facing interfaces must be configured using an enterprise-styleconfiguration.
- D. Host-facing interfaces must be configured using a service-provider style configuration.
Answer: B,D
Explanation:
* Understanding the Scenario:
* EVPN-VXLAN deployments often involve scenarios where multiple tenants or applications require overlapping VLAN IDs, which can be managed using the mac-vrf routing instance type.
This allows you to segregate traffic within the same VLAN ID across different tenants.
* Host-facing Interface Configuration:
* A. Host-facing interfaces must be configured using a service-provider style configuration:
This is correct. In mac-vrf configurations, host-facing interfaces (those connecting end devices) typically follow a service-provider style configuration, where each customer or tenant's traffic is isolated even if overlapping VLAN IDs are used.
* B. Host-facing interfaces must be configured using enterprise-style configuration:This is incorrect for mac-vrf instances because enterprise-style configurations are more common in simpler, less segmented networks.
* Routing Instance Service Type:
* D. The routing-instance service type can be VLAN-based:This is correct. The service type in mac-vrf can indeed be VLAN-based, which is particularly useful in scenarios where VLAN ID overlap is needed between different tenants or services.
Data Center References:
* The mac-vrf instance type is powerful for handling complex multi-tenant environments in EVPN- VXLAN, especially when dealing with overlapping VLAN IDs across different segments of the network.
NEW QUESTION # 37
You are selling up an EVPN-VXLAN architecture (or your new data center. thisinitial deployment will be less than 50 switches: however, it could scale up to 250 switches over time supporting 1024 VLANs. You are still deciding whether to use symmetric or asymmetric routing.
In this scenario, which two statements are correct? (Choose two.)
- A. Symmetric routing needs an extra VLAN with an IRB interface for each L3 VRF instance.
- B. Asymmetric routing is easier lo monitor because of the transit VNI.
- C. Symmetric routing supports higher scaling numbers.
- D. Asymmetric routing routes traffic on the egress switch.
Answer: C,D
Explanation:
* Symmetric vs. Asymmetric Routing in EVPN-VXLAN:
* Symmetric Routing:Traffic enters and exits the VXLAN network through the same VTEP, regardless of the source or destination. This approach simplifies routing decisions, especially in large networks, and is generally more scalable.
* Asymmetric Routing:The routing occurs on the egress VTEP. This method can be simpler to deploy in smaller environments but becomes complex as the network scales, particularly with larger numbers of VNIs and VLANs.
* Correct Statements:
* C. Symmetric routing supports higher scaling numbers:Symmetric routing is preferred in larger EVPN-VXLAN deployments because it centralizes routing decisions, which can be more easily managed and scaled.
* D. Asymmetric routing routes traffic on the egress switch:This is accurate, as asymmetric routing means the routing decision is made at the final hop, i.e., the egress VTEP before the traffic reaches its destination.
* Incorrect Statements:
* A. Symmetric routing needs an extra VLAN with an IRB interface for each L3 VRF instance:This is not accurate. Symmetric routing does not require an extra VLAN per VRF; rather, it uses the same VLAN/VNI across the network, simplifying routing and VLAN management.
* B. Asymmetric routing is easier to monitor because of the transit VNI:Asymmetric routing is not necessarily easier to monitor; in fact, it can add complexity due to the split routing logic between ingress and egress points.
Data Center References:
* The choice between symmetric and asymmetric routing in an EVPN-VXLAN environment depends on network size, complexity, and specific operational requirements. Symmetric routing is generally more scalable and easier to manage in large-scale deployments.
NEW QUESTION # 38
Exhibit.
Referring to the exhibit, which statement Is true?
- A. A CRB architecture is being used.
- B. A PBB-EVPN architecture is being used.
- C. An ERB architecture is being used.
- D. An OTT architecture is being used.
Answer: C
Explanation:
* Understanding Network Architectures:
* ERB (Edge Routed Bridging) architecture involves routing at the network's edge (leaf nodes), while traffic between leaf nodes is switched. This is commonly used in VXLAN-EVPN setups.
* Analysis of the Exhibit:
* The exhibit shows configurations related to routing instances, VXLAN, and VLANs, with VNIs being used for each VLAN. This setup is characteristic of an ERB architecture where each leaf device handles Layer 3 routing for its connected devices.
Conclusion:
* Option B:Correct-The configuration shown corresponds to an ERB architecture where routing occurs at the network's edge (leaf devices).
NEW QUESTION # 39
You are asked to implement VXLAN group-based policies (GBPs) in your data center. Which two statements are correct in (his scenario? (Choose two.)
- A. VXLAN GBP uses scalable group tags that may be configured on a RADIUS server and pushed to the switch through 802.1X.
- B. VXLAN GBP uses scalable group tags thatmust be configured statically on each switch and activated through 802.1X.
- C. VXLAN GBP ensures consistent application of security group policies throughout the network.
- D. VXLAN GBP ensures consistent application of BGP groups throughout the network.
Answer: A,C
Explanation:
* VXLAN Group-Based Policies (GBP):
* VXLAN Group-Based Policies are used to apply security policies consistently across the network. These policies are often tied to user or device identities rather than static IP addresses, which allows for more dynamic and scalable security management.
* Scalable Group Tags via RADIUS and 802.1X:
* Option B:VXLAN GBP can use scalable group tags configured on a RADIUS server, which are then pushed to network devices through 802.1X. This allows for centralized and automated policy application based on user or device identity.
* Consistent Security Policy Application:
* Option C:GBP ensures that security policies are consistently applied across the network, regardless of where a user or device connects. This consistency is crucial in environments where security policies must follow the user or device.
Conclusion:
* Option B:Correct-Group tags can be configured on a RADIUS server and pushed via 802.1X, enabling centralized policy management.
* Option C:Correct-GBP ensures consistent application of security policies, which is essential for maintaining security across a dynamic network environment.
NEW QUESTION # 40
Exhibit.
Referring tothe exhibit, which statement is correct?
- A. The MAC address is known but not reachable by the remote VTEP
- B. VNI 100 is not configured on the remote VTEP.
- C. The remote VTEP is not responding.
- D. The MAC address is unknown and not in the forwarding table of the remote VTEP.
Answer: D
Explanation:
* Analyzing the Exhibit Output:
* The command ping overlay tunnel-type vxlan is used to test the VXLAN tunnel between two VTEPs (VXLAN Tunnel Endpoints). The output shows a warning about missing hash parameters, but more importantly, it displays the result: End-System Not Present.
* Understanding the Response:
* The message End-System Not Present indicates that the remote VTEP (192.168.2.20) did not find the MAC address 00:00:5E:00:53:CC in its forwarding table. This typically means that the MAC address is unknown to the remote VTEP, and as a result, it could not forward the packet to the intended destination.
Conclusion:
* Option B:Correct-The MAC address is unknown and is not in the forwarding table of the remote VTEP, which is why the system reports that the "End-System" is not present.
NEW QUESTION # 41
Which two statements are true about a pure IP fabric? (Choose two.)
- A. Devices in an IP fabric function as Layer 3 routers.
- B. An IP fabric does not support Layer 2 protocols.
- C. Devices in an IP fabric must be connected to a fabric controller.
- D. An IP fabric supports Layer 2 VLANs.
Answer: A,B
Explanation:
* Understanding Pure IP Fabric:
* A pure IP fabric is a network design where all devices operate at Layer 3, meaning that each device in the fabric is a router that makes forwarding decisions based on IP addresses.
* Layer 2 Support:
* In a pure IP fabric, traditional Layer 2 protocols such as Spanning Tree Protocol (STP) or VLANs are not supported. Instead, the network relies entirely on Layer 3 routing protocols to manage traffic between devices.
* Routing Functionality:
* Since devices in an IP fabric operate as Layer 3 routers, they handle IP routing and provide network services based on IP addresses, not on MAC addresses or Layer 2 switching.
Conclusion:
* Option A:Correct-Devices in an IP fabric function as Layer 3 routers.
* Option D:Correct-A pure IP fabric does not support traditional Layer 2 protocols, making it a purely routed environment.
NEW QUESTION # 42
Which statement is correct about a collapsed fabric EVPN-VXLAN architecture?
- A. Fully meshed back-to-back links are needed between the spine devices.
- B. Border gateway functions occur on border leaf devices.
- C. It supports multiple vendors in the fabric as long as all the spine devices are Juniper devices deployed with L2 VTEPs
- D. Using Virtual Chassis at the leaf layer increases resiliency.
Answer: B
Explanation:
* Collapsed Fabric Architecture:
* A collapsed fabric refers to a simplified architecture where the spine and leaf roles are combined, often reducing the number of devices and links required.
* In this architecture, the spine typically handles core switching, while leaf switches handle both access and distribution roles.
* Understanding Border Gateway Functionality:
* Border gateway functions include connecting the data center to external networks or other data centers.
* In a collapsed fabric, these functions are usually handled at the leaf level, particularly on border leaf devices that manage the ingress and egress of traffic to and from the data center fabric.
* Correct Statement:
* D. Border gateway functions occur on border leaf devices:This is accurate in collapsed fabric architectures, where the border leaf devices take on the role of managing external connections and handling routes to other data centers or the internet.
Data Center References:
* The collapsed fabric model is advantageous in smaller deployments or scenarios where simplicity and cost-effectiveness are prioritized. It reduces complexity by consolidating functions into fewer devices, and the border leaf handles the critical task of interfacing with external networks.
In conclusion, border gateway functions are effectively managed at the leaf layer in collapsed fabric architectures, ensuring that the data center can communicate with external networks seamlessly.
NEW QUESTION # 43
In your EVPN-VXAN environment, you want to prevent a multihomed server from receiving multiple copies ofBUM traffic in active/active scenarios. Which EVPN route type would satisfy this requirement?
- A. Type 7
- B. Type 4
- C. Type 8
- D. Type 5
Answer: B
Explanation:
* Understanding the Scenario:
* In an EVPN-VXLAN environment, when using multi-homing in active/active scenarios, there's a risk that a multihomed server might receive duplicate copies of Broadcast, Unknown unicast, and Multicast (BUM) traffic. This is because multiple VTEPs might forward the same BUM traffic to the server.
* EVPN Route Types:
* Type 4 Route (Ethernet Segment Route):This route type is used to advertise the Ethernet Segment (ES) to which the device is connected. It is specifically used in multi-homing scenarios to signal the ES and its associated Ethernet Tag to all the remote VTEPs. The Type 4 route includes information that helps prevent BUM traffic duplication in active/active multi-homing by using a split-horizon mechanism, which ensures that traffic sent to a multihomed device does not get looped back.
* Explanation:
* The Type 4 route is crucial for ensuring that in a multi-homed setup, particularly in an active
/active configuration, BUM traffic does not result in duplication at the server. The route helps coordinate which VTEP is responsible for forwarding the BUM traffic to the server, thereby preventing duplicate traffic.
Data Center References:
* Type 4 routes are essential for managing multi-homing in EVPN to avoid the issues of BUM traffic duplication, which could otherwise lead to inefficiencies and potential network issues.
NEW QUESTION # 44
Exhibit.
Given the configuration shown in the exhibit, why has the next hop remained the same for the EVPN routes advertised to the peer 203.0.113.2?
- A. The vrf-export parameter must be applied.
- B. The export policy is incorrectly configured.
- C. EVPN routes cannot have the next hop changed.
- D. The vpn-apply-export parameter must be applied to this peer.
Answer: D
Explanation:
* Understanding the Configuration:
* The configuration shown in the exhibit involves an EVPN (Ethernet VPN) setup using BGP as the routing protocol. The export policy named CHANGE_NH is applied to the BGP group evpn- peer, which includes a rule to change the next hop for routes that match the policy.
* Issue with Next Hop Not Changing:
* The policy CHANGE_NH is correctly configured to change the next hop to 203.0.113.10 for the matching routes. However, the next hop remains unchanged when advertising EVPN routes to the peer 203.0.113.2.
* Reason for the Issue:
* In Junos OS, when exporting routes for VPNs (including EVPN), the next-hop change defined in a policy will not take effect unless the vpn-apply-export parameter is used inthe BGP configuration. This parameter ensures that the export policy is applied specifically to VPN routes.
* The vpn-apply-export parameter must be included to apply the next-hop change to EVPN routes.
* Correct Answer Explanation:
* D. The vpn-apply-export parameter must be applied to this peer:This is the correct solution because the next hop in EVPN routes won't be altered without this parameter in the BGP configuration. It instructs the BGP process to apply the export policy to the EVPN routes.
Data Center References:
* This behavior is standard in EVPN deployments with Juniper Networks devices, where the export policies applied to VPN routes require explicit invocation using vpn-apply-export to take effect.
NEW QUESTION # 45
You are implementing seamless stitching between two data centers and have a proposedconfiguration for a border leafdevice.
In this scenario, which two statements are correct? {Choose two.)
- A. The translation-vni must match in both data centers.
- B. The ESI must be different in each data center.
- C. The ESI must match in both data centers.
- D. The translation-vni must be different in each data center.
Answer: C,D
Explanation:
* Understanding Seamless Stitching:
* Seamless stitching is used in EVPN to interconnect two data centers, allowing for consistent Layer 2 and Layer 3 connectivity across them. This is often achieved by translating VNIs (Virtual Network Identifiers) between the data centers.
* Translation-VNI:
* Option B:The translation VNI must be different in each data center to ensure that traffic can be correctly routed and distinguished as it crosses between the data centers. This differentiation helps to maintain the integrity of the traffic flows and prevents any potential overlap or conflict in VNIs.
* Ethernet Segment Identifier (ESI):
* Option D:The ESI must match in both data centers to ensure that the same Ethernet segment (which could be multihomed) is recognized consistently across the data centers. Matching ESIs are crucial for maintaining a unified view of the Ethernet segment across the interconnected fabric.
Conclusion:
* Option B:Correct-Translation VNIs must be unique to each data center for proper traffic distinction.
* Option D:Correct-Matching ESIs are necessary to maintain consistent Ethernet segment identification across both data centers.
NEW QUESTION # 46
You are asked to interconnect two of your company's data centers across an IP backbone. Both data centers require Layer 2 and Layer 3 connectivity. In this scenario, which three actions would accomplish this task?
(Choose three.)
- A. Ensure there is a full mesh of VTEPs between all leaf nodes within data centers.
- B. Ensure border leaf nodes in each data center can exchange EVPN routes.
- C. Advertise Type 5 EVPN routes across the DCI.
- D. Ensure there is a full mesh of VTEPs between all spine nodes within both data centers.
- E. Advertise Type 2 EVPN routes across the DCI.
Answer: B,C,E
Explanation:
* Layer 2 and Layer 3 Connectivity Requirements:
* To interconnect two data centers across an IP backbone with both Layer 2 (L2) and Layer 3 (L3) connectivity, EVPN-VXLAN (Ethernet VPN with Virtual Extensible LAN) is the ideal solution.
EVPN supports L2 VPNs while also enabling L3 connectivity across multiple locations.
* Necessary EVPN Route Types:
* Type 2 EVPN Routes:These routes are used to advertise MAC addresses for Layer 2 connectivity. They are essential for enabling seamless L2 communication across data centers.
* Type 5 EVPN Routes:These routes are necessary for advertising IP prefixes for Layer 3 connectivity between data centers. They enable the exchange of L3 information across the IP backbone, ensuring routed traffic can reach its destination.
* Border Leaf Nodes:
* Border Leaf Nodes:Ensuring that the border leaf nodes (the entry and exit points for traffic between data centers) can exchange EVPN routes is critical for the correct dissemination of both L2 and L3 information across the data centers.
Conclusion:
* Option A:Correct-Type 2 EVPN routes are required for Layer 2 MAC address learning and communication across the DCI (Data Center Interconnect).
* Option B:Correct-Border leaf nodes need to exchange EVPN routes to maintain connectivity between data centers.
* Option D:Correct-Type 5 EVPN routes are essential for Layer 3 connectivity across the DCI.
OptionsCandEare incorrect because they refer to establishing full mesh VTEPs (VXLAN Tunnel Endpoints) across all spine or leaf nodes, which is unnecessary for the scenario provided. The focus should be on border leaf nodes and appropriate route advertisements for L2 and L3 connectivity.
NEW QUESTION # 47
You want to convert an MX Series router from a VXLAN Layer 2 gateway to a VXLAN Layer 3 gateway for VNI 100. You have already configured an IRB interface. In this scenario, which command would you use to accomplish this task?
- A. set protocols ospf area 0.0.0.0 interface irb.100 passive
- B. set protocols isis interface irb.100 passive
- C. set vlans VLAN-100 13-interface irb.100
- D. set bridge-domains VLAN-100 routing-interface irb.100
Answer: D
Explanation:
* Scenario Overview:
* Converting an MX Series router from a VXLAN Layer 2 gateway to a VXLAN Layer 3 gateway involves transitioning the router's functionality from simply bridging traffic within a VXLAN segment to routing traffic between different segments.
* Key Configuration Requirement:
* IRB (Integrated Routing and Bridging) Interface:An IRB interface allows for both Layer 2 switching and Layer 3 routing. To enable routing for a specific VNI (VXLAN Network Identifier), the IRB interface must be associated with the routing function in the corresponding bridge domain.
* Correct Command:
* C. set bridge-domains VLAN-100 routing-interface irb.100:This command correctly binds the IRB interface to the bridge domain, enabling Layer 3 routing functionality within the VXLAN for VNI 100. This effectively transitions the device from operating solely as a Layer 2 gateway to a Layer 3 gateway.
Data Center References:
* This configuration step is essential when converting a Layer 2 VXLAN gateway to a Layer 3 gateway, enabling the MX Series router to route between VXLAN segments.
NEW QUESTION # 48
You are deploying a new network lo support your Al workloads on devices that support at least 400 Gbps Ethernet. There is no requirement for any Layer 2 VLANs in this network. Which network architecture would satisfy this requirement?
- A. an IP fabric with an EVPN-VXLAN architecture
- B. an IP fabric using PIM-SM to signal VXLAN overlay
- C. an IP fabric using EBGP
- D. an IP fabric using the EVPN-MPLS architecture
Answer: C
Explanation:
* Requirements for AI Workloads:
* The scenario requires a network that supports at least 400 Gbps Ethernet and does not require Layer 2 VLANs. This setup is well-suited for a pure Layer 3 network, which can efficiently route traffic between devices without the overhead or complexity of maintaining Layer 2 domains.
* Choosing the Right Network Architecture:
* Option D:An IP fabric using EBGP (External BGP) is ideal for this scenario. In a typical IP fabric, EBGP is used to handle routing between spine and leaf switches, creating a scalable and efficient network. Since there is no need for Layer 2 VLANs, the pure IP fabric design with EBGP provides a straightforward and effective solution.
* Options A, B, and Cinvolve more complex architectures (like VXLAN or EVPN), which are unnecessary when there's no requirement for Layer 2 overlays or VLANs.
Conclusion:
* Option D:Correct-An IP fabric with EBGP is the most suitable and straightforward architecture for a network that needs to support high-speed AI workloads without Layer 2 VLANs.
NEW QUESTION # 49
Exhibit.
Referring to the exhibit, the spinel device has an underlay BGP group that is configured to peer with its neighbors' directly connected interfaces. Which two statements are true in this scenario? (Choose two.)
- A. The multihop statement is not required to establish the underlay BGP sessions.
- B. The multihop statement is required to establish the underlay BGP sessions.
- C. Load balancing for the underlay is configured correctly.
- D. Load balancing for the underlay is not configured correctly.
Answer: A,C
Explanation:
* Understanding BGP Configuration in the Exhibit:
* The exhibit shows a BGP configuration on spine1 with a group named underlay, configured to peer with directly connected interfaces of other devices in the network.
* Multipath multiple-as:This statement allows the router to install multiple paths in the routing table for routes learned from different ASes, facilitating load balancing.
* Key Statements:
* A. The multihop statement is not required to establish the underlay BGP sessions:In this case, the BGP peers are directly connected (as indicated by their neighbor IP addresses), so the multihop statement is unnecessary. Multihop is typically used when BGP peers are not directly connected and packets need to traverse multiple hops.
* D. Load balancing for the underlay is configured correctly:The multipath { multiple-as; } statement in the configuration enables load balancing across multiple paths from different autonomous systems, which is appropriate for underlay networks in data center fabrics.
* Incorrect Statements:
* C. The multihop statement is required to establish the underlay BGP sessions:This is incorrect because the peers are directly connected, making the multihop statement unnecessary.
* B. Load balancing for the underlay is not configured correctly:This is incorrect because the configuration includes the necessary multipath settings for load balancing.
Data Center References:
* BGP configurations in EVPN-VXLAN underlay networks are crucial for ensuring redundancy, load balancing, and efficient route propagation across the data center fabric.
NEW QUESTION # 50
Exhibit.
Referring to the exhibit, why is the active source field blank for the entry that uses the 00:0c:29:e8:b7:39 MAC address?
- A. The ARP lookup for this host has failed.
- B. The host for this entry is locally connected to leaf1.
- C. This entry is associated with a multicast EVPN route.
- D. The EVPN route for this host does not have a valid next hop.
Answer: D
Explanation:
In this scenario, the active source field is blank for the MAC address 00:0c:29:e8:b7:39, indicating an issue with how this MAC entry is being processed within the EVPN/VXLAN environment.
Step-by-Step Analysis:
* Understanding the MAC Entry:
* The active source field should normally indicate the source of the route advertisement for a specific MAC address within the EVPN. If it is blank, it suggests that there is a problem with how this entry is being learned or propagated.
* Possible Issues:
* Option A:If the EVPN route for this MAC address does not have a valid next hop, the entry might exist in the MAC table, but it will not have a valid path for forwarding, leading to a blank active source.
* Option B:If the ARP lookup had failed, the entry might not even appear in the MAC table.
However, the entry does exist, suggesting that ARP is not the primary issue here.
* Option C:If the host were locally connected, the active source should reflect a local interface, but the field is blank, ruling out local connection as the cause.
* Option D:Multicast EVPN routes typically do not appear in this manner in the MAC table, and this would not cause the active source to be blank.
Conclusion:The most logical explanation is that the EVPN route for this host exists but does not have a valid next hop, leading to the absence of an active source. This is consistent with how EVPN routing tables work in a VXLAN environment, where the lack of a valid next hop would prevent proper route advertisement and forwarding for the specific MAC address.
NEW QUESTION # 51
You are deploying a Clos IP fabric with an oversubscription ratio of 3:1.
In this scenario, which two statements are correct? (Choose two.)
- A. The oversubscription ratio increases when you remove spine devices.
- B. The oversubscription ratio remains the same when you add spine devices.
- C. The oversubscription ratio remains the same when you remove spine devices.
- D. The oversubscription ratio decreases when you add spine devices.
Answer: A,D
Explanation:
* Understanding Oversubscription in a Clos Fabric:
* The oversubscription ratio in a Clos IP fabric measures the ratio of the amount of edge (leaf) bandwidth to the core (spine) bandwidth. An oversubscription ratio of 3:1 means that there is three times more edge bandwidth compared to core bandwidth.
* Impact of Adding/Removing Spine Devices:
* Option C:If youremove spine devices, the total available core bandwidth decreases, while the edge bandwidth remains the same. This results in anincrease in the oversubscription ratio because there is now less core bandwidth to handle the same amount of edge traffic.
* Option B:Conversely, if youadd spine devices, the total core bandwidth increases. This decreases the oversubscription ratio because more core bandwidth is available to handle the edge traffic.
Conclusion:
* Option C:Correct-Removing spine devices increases the oversubscription ratio.
* Option B:Correct-Adding spine devices decreases the oversubscription ratio.
NEW QUESTION # 52
You are asked to interconnect Iwo data centers using a method that provides EVPN Type 2 connectivity, is highly scalable, and limits VXLAN tunnels between border leafdevices. What will satisfy these requirements?
- A. over the top full-mesh interconnect
- B. IP VPN
- C. Type 2 seamless stitching
- D. EVPN Type 2 stretch
Answer: C
Explanation:
* Requirement Analysis:
* The scenario requires a solution to interconnect two data centers that supports EVPN Type 2 connectivity. The solution must be highly scalable and must minimize the number of VXLAN tunnels between border leaf devices.
* Understanding Type 2 Seamless Stitching:
* Option D:Type 2 seamless stitchingis a method used in EVPN to provide Layer 2 connectivity (such as MAC address mobility) across different VXLAN segments. It is scalable because it allows only necessary tunnels to be established between border leaf devices, reducing the overhead of maintaining a full mesh of VXLAN tunnels.
Conclusion:
* Option D:Correct-Type 2 seamless stitching satisfies the requirement by enabling scalable, efficient interconnection of two data centers with minimal VXLAN tunnels.
NEW QUESTION # 53
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