[Apr-2025] Dumps Practice Exam Questions Study Guide for the JN0-683 Exam
JN0-683 Dumps with Practice Exam Questions Answers
Juniper JN0-683 Exam Syllabus Topics:
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NEW QUESTION # 20
Which parameter is used to associate a received route with a local VPN route table?
- A. route-target community
- B. VLAN ID
- C. route-distinguisher
- D. VNI
Answer: A
Explanation:
* Understanding VPN Route Table Association:
* In MPLS/VPN and EVPN networks, theroute-target communityis a BGP extended community attribute used to control the import and export of VPN routes. It associates received routes with the appropriate VPN route tables on the PE (Provider Edge) routers.
* Function of Route-Target Community:
* The route-target community tag ensures that routes are imported into the correct VRF (Virtual Routing and Forwarding) instance, allowing them to be correctly routed within the VPN.
Conclusion:
* Option A:Correct-The route-target community is used to associate received routes with a local VPN route table.
NEW QUESTION # 21
You manage an IP fabric with an EVPN-VXLAN overlay. You have multiple tenants separated using multiple unique VRF instances. You want to determine the routing information that belongs in each routing instance's routing table.
In this scenario, which property is used for this purpose?
- A. the VRF table label
- B. the routing instance type
- C. the route distinguisher value
- D. the VRF target community
Answer: C
Explanation:
* Understanding VRF and Routing Instances:
* In an EVPN-VXLAN overlay network, multiple tenants are separated using unique VRF (Virtual Routing and Forwarding) instances. Each VRF instance maintains its own routing table, allowing for isolated routing domains within the same network infrastructure.
* Role of Route Distinguisher:
* Route Distinguisher (RD):The RD is a unique identifier used in MPLS and EVPN environments to distinguish routes belonging to different VRFs. The RD is prepended to the IP address in the route advertisement, ensuring that routes from different tenants remain unique even if they use the same IP address range.
* Correct Property:
* D. the route distinguisher value:This is the correct answer because the RD is crucial in determining which routing information belongs to which VRF instance. It ensures that each VRF' s routing table only contains relevant routes, maintaining isolation between tenants.
Data Center References:
* The RD is a key element in MPLS and EVPN-based multi-tenant environments, ensuring proper routing segregation and isolation for different VRFs within the data center fabric.
NEW QUESTION # 22
Exhibit.
Referring to the exhibit, which statement Is true?
- A. An OTT architecture is being used.
- B. A CRB architecture is being used.
- C. An ERB architecture is being used.
- D. A PBB-EVPN 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 # 23
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 remains the same when you add spine devices.
- B. The oversubscription ratio decreases when you add spine devices.
- C. The oversubscription ratio increases when you remove spine devices.
- D. The oversubscription ratio remains the same when you remove spine devices.
Answer: B,C
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 # 24
Which two statements are correct about an IP fabric? (Choose two.)
- A. The multipath multiple-as statement is required to enable ECMP if every device has a different AS number.
- B. Only a single point to point EBGP session is required between peers in an IP fabric.
- C. All leaf devices can use the same AS number in an IP fabric without making any adjustments to the EBGP configuration
- D. FBGP is only required to route mostrouting information to external devices outside the fabric.
Answer: A,C
Explanation:
* BGP in IP Fabric:
* In an IP fabric, Border Gateway Protocol (BGP) is used to manage the routing between leaf and spine devices. Each device can have the same or different Autonomous System (AS) numbers depending on the network design.
* Multipath Multiple-AS:
* Option B:If every device in the fabric has a different AS number, then enabling Equal-Cost Multi-Path (ECMP) routing requires the multipath multiple-as statement. This configuration allows BGP to consider multiple paths across different AS numbers as equal cost, enabling efficient load balancing across the network.
* Same AS Number Configuration:
* Option A:It's possible for all leaf devices to use the same AS number in an IP fabric, which simplifies the configuration. EBGP (External BGP) will still function correctly in this setup because BGP considers the peering relationship rather than strictly enforcing different AS numbers in this specific use case.
Conclusion:
* Option B:Correct-This statement is essential for enabling ECMP in a multi-AS environment.
* Option A:Correct-Leaf devices can share the same AS number without needing special EBGP configuration.
NEW QUESTION # 25
Which three statements are correct about VXLAN control planes? (Choose three.)
- A. EVPN enables fast convergence and updates.
- B. Multicast is not agile and requires manual VNI mapping.
- C. EVPN is inefficient and does not scale well.
- D. Both multicast and EVPN can facilitate MAC learning.
- E. Multicast does not require as many resources.
Answer: A,D,E
Explanation:
* VXLAN Control Planes:
* VXLAN (Virtual Extensible LAN) uses different control planes to handle MAC learning and traffic forwarding. The control planes include multicast and EVPN (Ethernet VPN).
* Multicast and EVPN Comparison:
* Option B:Both multicast and EVPN can be used for MAC learning in a VXLAN environment.
Multicast is a more traditional approach, while EVPN is more advanced and supports distributed MAC learning.
* Option D:EVPN offers benefits such as fast convergence and rapid updates, making it more efficient and scalable for modern data center environments.
* Option E:Multicast does not require as many resources because it relies on traditional Layer 3 multicast mechanisms to distribute broadcast, unknown unicast, and multicast (BUM) traffic.
However, it can be less flexible and less scalable compared to EVPN.
Conclusion:
* Option B:Correct-Both control planes facilitate MAC learning.
* Option D:Correct-EVPN provides fast convergence and updates.
* Option E:Correct-Multicast is resource-efficient but less flexible.
NEW QUESTION # 26
Exhibit.
Both DC and DC2 ate using EVPN-VXLAN technology deployed using an ERB architecture. A server on the Red VLAN must communicate with a server on the Green VLAN. The Blue VLAN in DC and DC2 needs to be the same VLAN.
Which statement is correct in this scenario?
- A. An interconnect is required between the four SRX Series devices; the Blue VLAN must be stretched and a transit VNI must be added for the Red and Green VLANs.
- B. The eight spine devices must be configured as border spine devices; a full mush interconnect must exist between all eight spine devices and the Blue VLAN must be stitched together
- C. An interconnect is required between four leaf devices in the services blocks; the Red VLAN and the Green VLAN must be stitched and the Blue VLAN must be stretched.
- D. A lean super spine device must be added to DC and DC2; all VLANs must be stretched to the lean super spine device and the lean super spine devices must stitch all the VLANs together.
Answer: A
Explanation:
* ERB Architecture in EVPN-VXLAN:
* ERB (Edge Routed Bridging) architecture is commonly used in data center networks where routing decisions are made at the network edge (leaf or border devices), while bridging (Layer 2 forwarding) is extended across the fabric. This architecture allows for efficient L3 routing while still enabling L2 services like VLANs to span across multiple locations.
* VLAN and VNI Configuration:
* The scenario specifies that a server on the Red VLAN needs to communicate with a server on the Green VLAN. Since these VLANs are in different data centers (DC and DC2), and given the use of EVPN-VXLAN, the communication between these VLANs will require atransit VNI(Virtual Network Identifier). This transit VNI will allow traffic to traverse the VXLAN tunnel across the DCI (Data Center Interconnect).
* Interconnect between SRX Series Devices:
* The exhibit shows SRX Series Chassis Clusters used as service devices (likely for firewalling or other security services). These devices need to be interconnected between the two data centers to ensure that VLANs can communicate effectively. The Blue VLAN needs to be stretched between DC and DC2 to maintain the same Layer 2 domain across both data centers.
Conclusion:
* Option B:Correct-Interconnecting the SRX Series devices will ensure the necessary service chaining, while stretching the Blue VLAN and adding a transit VNI for the Red and Green VLANs will enable the required communication across the data centers.
NEW QUESTION # 27
You are using a single tenant data center with a bridged overlay architecture. In this scenario, how do hosts of the different virtual networks communicate with each other?
- A. off-fabric using an external device
- B. using EVPN Type 5 routes
- C. using virtual gateway addresses configured on the spine
- D. using anycast gateway addresses configured on the leaf devices
Answer: A
Explanation:
* Understanding Bridged Overlay Architecture:
* In a single-tenant data center using a bridged overlay architecture, virtual networks (VLANs) are typically isolated within the fabric, with traffic between these VLANs handled outside the fabric.
* Communication Between Different Virtual Networks:
* A. off-fabric using an external device:This is correct. In many bridged overlay architectures, communication between different virtual networks is handled off-fabric, often using an external router or firewall that connects the different VLANs. The fabric itself primarily provides Layer 2 connectivity within each VLAN, leaving inter-VLAN routing to be handled externally.
Data Center References:
* This design is common in smaller or simpler data center environments where a single tenant does not require complex on-fabric routing and prefers to handle inter-VLAN routing through dedicated devices.
NEW QUESTION # 28
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 8
- B. Type 5
- C. Type 4
- D. Type 7
Answer: C
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 # 29
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 DHCP server configuration cannot provide Junos version requirements to DHCP clients.
- C. The DHCP server configuration can provide Junos version requirements to DHCP clients.
- D. The switch will try to request an IP address from a DHCP server using only the management interface.
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 # 30
You are asked to identify microburst traffic occurring in the network leading lo packet drops in your data center switches Which two tools would be used in this scenario? (Choose two.)
- A. port buffer monitoring
- B. Traceoptions
- C. syslog
- D. port mirroring
Answer: A,D
Explanation:
* Identifying Microburst Traffic:
* Microbursts are short spikes in network traffic that can overwhelm buffers and cause packet drops. Detecting and analyzing microbursts is crucial for understanding where packet loss might be occurring in a data center network.
* Port Buffer Monitoring:
* Port Buffer Monitoring:This tool specifically tracks the usage of switch buffers, helping to identify when microbursts are causing buffers to overflow, leading to packet drops.
* Port Mirroring:
* Port Mirroring:This tool allows you to monitor real-time traffic on a specific port by copying the traffic to another port where it can be analyzed, often with a packet analyzer. While port mirroring doesn't directly detect microbursts, it helps capture traffic patterns that can indicate microbursts.
Conclusion:
* Option C:Correct-Port buffer monitoring directly identifies buffer overflows caused by microbursts.
* Option A:Correct-Port mirroring allows for the detailed capture and analysis of traffic patterns, which can reveal microburst behavior.
Options B(Traceoptions) andD(Syslog) are less effective in identifying microburst traffic. Traceoptions focus on control plane traffic debugging, and Syslog is more about logging system events than detecting high- frequency traffic spikes.
NEW QUESTION # 31
Exhibit.
Connections between hosts connected to Leaf-1 and Leaf-2 are not working correctly.
Referring to the exhibit, which two configuration changes are required to solve the problem? (Choose two.)
- A. Configure the setswitch-options vtep-source-interface100. 0 parameter on Leaf-1.
- B. Configure the setswitch-options route-distinguisher 192.168.100.51:2 parameter on Leaf-1.
- C. Configure the set switch-options vrf-target target: 65000:55 parameter on Leaf-2.
- D. Configure the set switch-options service-id 1 parameter on Leaf-2.
Answer: C,D
Explanation:
* Review of the Exhibit:
* The exhibit shows the switch configuration for Leaf-1 and Leaf-2. The configurations include route distinguishers, VRF targets, and service IDs, all of which are crucial for ensuring proper operation in an EVPN-VXLAN environment.
* Service-ID Consistency:
* The service ID must be consistent across all participating leaf devices in the same EVPN instance to ensure that they are part of the same VXLAN overlay network.
* VRF Target Consistency:
* The vrf-target parameter must also be consistent across devices to ensure that VRFs (Virtual Routing and Forwarding instances) are correctly imported and exported between leaf nodes.
Conclusion:
* Option B:Correct-Setting the same service-id on Leaf-2 ensures that it is part of the same VXLAN overlay as Leaf-1.
* Option D:Correct-The vrf-target on Leaf-2 should match Leaf-1 to ensure consistent routing policies and proper route exchange.
NEW QUESTION # 32
You want to ensure thatVXLAN traffic from the xe-0/0/12 interlace is being encapsulatedby logical vlep.
32770 and sent to a remote leaf device in this scenario, which command would you use to verify that traffic is flowing?
- A. show interfaces terse vtep.32770 statistics
- B. show interfaces vtep.32770 detail
- C. show interface terse vtep.32770
- D. monitor traffic interface xe-0/0/12
Answer: A
Explanation:
* VXLAN Traffic Verification:
* To ensure VXLAN traffic from the xe-0/0/12 interface is correctly encapsulated by the logical vtep.32770 and sent to a remote leaf device, it is essential to monitor the relevant interface statistics.
* The command show interfaces terse vtep.32770 statistics provides a concise overview of the traffic statistics for the specific VTEP interface, which can help verify whether traffic is being correctly encapsulated and transmitted.
* Explanation:
* This command is particularly useful for quickly checking the traffic counters and identifying any potential issues with VXLAN encapsulation or transmission.
* It allows you to confirm that traffic is flowing as expected, by checking the transmitted and received packet counters.
Data Center References:
* Monitoring interface statistics is a crucial step in troubleshooting and validating network traffic, particularly in complex overlay environments like EVPN-VXLAN.
NEW QUESTION # 33
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. gNMI
- C. Native Sensors
- D. OpenConfig
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 # 34
Exhibit.
You are troubleshooting an IP fabric (or your data center. You notice that your traffic is not being load balanced to your spine devices from your leaf devices. Referring to the configuration shown in the exhibit, what must be configured to solve this issue?
- A. The load-balance policy must be applied to the forwarding table under the routing-options hierarchy.
- B. The load-balance policy must be applied as an export policy to your BGP
- C. The load-balance policy must have a from statement that matches on protocol bgp.
- D. The multipastmultiple -as configuration must be configured for each peer in the BGP spine group.
Answer: D
Explanation:
* IP Fabric Load Balancing:
* In the provided configuration, traffic is not being load-balanced to the spine devices. The issue likely relates to how BGP routes are being selected and whether Equal-Cost Multi-Path (ECMP) is functioning correctly.
* Multipath Multiple-AS:
* Option B:The multipath multiple-as configuration is essential when using BGP in an IP fabric where devices belong to different Autonomous Systems (AS). This setting allows BGP to consider multiple paths (even across different AS numbers) as equal cost, enabling ECMP and proper load balancing across spine devices.
Conclusion:
* Option B:Correct-The multipath multiple-as configuration is necessary for achieving ECMP and effective load balancing in a multi-AS BGP environment.
NEW QUESTION # 35
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 MAC address of the FTP server
- B. the IP address of the FTP server
- C. the management IP address for each OFX5120
- D. the MAC address for each OFX5120
Answer: C,D
Explanation:
* Zero Touch Provisioning (ZTP):
* ZTP allows for the automated configuration of network devices, like QFX Series switches, without manual intervention. During ZTP, a switch will obtain its configuration from a DHCP server and then download the required software and configuration files from a specified server (e.
g., FTP, HTTP).
* DHCP Server Configuration:
* Option B:The DHCP server needs to know theMAC address for each QFX5120to provide a specific configuration based on the device identity. By mapping the MAC address to a particular configuration, the DHCP server can ensure that each switch gets the correct configuration.
* Option D:Themanagement IP address for each QFX5120must also be assigned by the DHCP server. This IP address allows the device to communicate on the network and access the configuration files and other required resources during the ZTP process.
Conclusion:
* Option B:Correct-MAC addresses allow the DHCP server to identify each QFX5120 and assign the appropriate configuration.
* Option D:Correct-Management IP addresses are essential for network communication during ZTP.
NEW QUESTION # 36
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. Devices in irb.400 (vlan 400) are not able to communicate directly with devices in routing instance Customer A.
- B. VNI 10006is assigned to vlan 800 (irb.800).
- C. Devices in routing instance Customer A are able to communicate with devices in routing instance Customer B
- D. Devices in irb.400 (vlan 400) and irb.800 (vlan 800) are able to communicate over the fabric.
Answer: A,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 # 37
Exhibit.
Connections between hosts connected to Leaf-1 and Leaf-2 are not working correctly.
- A. Configure the setswitch-options route-distinguisher i92.168.100.50:i parameter on Leaf-1.
- B. Configure the set switch-options vrf-target target:65000:l parameteron Leaf-2.
- C. Configure the setswitch-options vtep-source-interface irb.0parameter on Leaf-1.
- D. Referring to the exhibit, which two configuration changes are required to solve the problem? (Choose two.)
- E. Configure the setswitch-options service-id 1 parameter on Leaf-2.
Answer: B,E
Explanation:
* Issue Analysis:
* The problem in the exhibit suggests a mismatch in configuration parameters between Leaf-1 and Leaf-2, leading to communication issues between hosts connected to these leaf devices.
* Configuration Mismatches:
* Service-ID:Leaf-1 has service-id 1 configured, while Leaf-2 does not have this parameter. For consistency and proper operation, the service-id should be the same across both leaf devices.
* VRF Target:Leaf-1 is configured with vrf-target target:65000:1, while Leaf-2 is configured with vrf-target target:65000:2. To allow proper VRF import/export between the two leafs, these should match.
* Corrective Actions:
* C. Configure the set switch-options vrf-target target:65000:1 parameter on Leaf-2:This aligns the VRF targets between the two leaf devices, ensuring they can correctly import and export routes.
* E. Configure the set switch-options service-id 1 parameter on Leaf-2:This ensures that both Leaf-1 and Leaf-2 use the same service ID, which is necessary for consistency in the EVPN- VXLAN setup.
Data Center References:
* Correct configuration of VRF targets and service IDs is critical in EVPN-VXLAN setups to ensure that routes and services are correctly shared and recognized between different devices in the network fabric.
NEW QUESTION # 38
You are adding a server lo a tenant's network within your data center and must limit access to a specific traffic type within the tenant network without pushing all tenant traffic through a firewall.
What will satisfy this requirement?
- A. Use a static route in the tenant VRF with a firewall as the next hop for traffic to the new server.
- B. Put the new server on a unique subnet within the tenant's network.
- C. Use route leaking with EVPN and a routing policy.
- D. Use filter-based forwarding.
Answer: D
Explanation:
* Controlling Traffic Within a Tenant's Network:
* The requirement is to limit access to specific traffic types within a tenant's network without routing all tenant traffic through a firewall. This requires a selective method that can direct specific types of traffic to different paths based on the nature of the traffic.
* Filter-Based Forwarding (FBF):
* FBF is a technique that allows for routing decisions based on filters applied to the traffic, such as matching on source IP addresses, destination IP addresses, or even specific application types (like HTTP or FTP). This allows specific types of traffic to be forwardedto a specific next hop (e.g., a firewall) without affecting the entire traffic flow within the tenant's network.
Conclusion:
* Option B:Correct-Filter-based forwarding allows for granular control of traffic, ensuring that only specific types of traffic within the tenant's network are redirected through a firewall, satisfying the requirement.
NEW QUESTION # 39
You are deploying an IP fabric with an oversubscription ratio of 3:1.
In this scenario, which two statements are correct? (Choose two.)
- A. The oversubscription ratio remains the same when you add leaf devices.
- B. The oversubscription ratio increases when you remove leaf devices.
- C. The oversubscription ratio decreases when you add leaf devices.
- D. The oversubscription ratio remains the same when you remove leaf devices.
Answer: A,B
Explanation:
* Understanding Oversubscription Ratio in IP Fabrics:
* The oversubscription ratio in an IP fabric typically refers to the ratio of the available bandwidth at the edge of the network (leaves) to the available bandwidth at the core or spine. A 3:1 oversubscription ratio means that for every 3 units of bandwidth at the leaves, there is 1 unit of bandwidth at the spine.
* Impact of Adding or Removing Leaf Devices:
* Removing Leaf Devices:When you remove leaf devices, the amount of total edge bandwidth decreases while the bandwidth in the spine remains constant. This causes the oversubscription ratio toincreasebecause there is now less total bandwidth to distribute across the same amount of spine bandwidth.
* Adding Leaf Devices:Conversely, when you add leaf devices, the total edge bandwidth increases. Since the spine bandwidth remains the same, the oversubscription ratio would remain the same if the additional leaves consume their share of the available bandwidth proportionally.
Conclusion:
* Option C:Correct-Removing leaf devices increases the oversubscription ratio.
* Option D:Correct-Adding leaf devices typically maintains the oversubscription ratio assuming uniform bandwidth distribution.
NEW QUESTION # 40
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 using PIM-SM to signal VXLAN overlay
- B. an IP fabric using the EVPN-MPLS architecture
- C. an IP fabric with an EVPN-VXLAN architecture
- D. an IP fabric using EBGP
Answer: D
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 # 41
Which two statements are true about IP fabrics using unnumbered BGP? (Choose two.)
- A. Unnumbered BGP requires that family inet6is configured on each interface.
- B. Unnumbered BGP peering automatically provisions IPv6 peering.
- C. Unnumbered BGP peering automatically provisions IPv4 peering.
- D. Unnumbered BGP requires that family inet is configured on each interface.
Answer: C,D
Explanation:
* Understanding Unnumbered BGP:
* Unnumbered BGP (Border Gateway Protocol) allows BGP peering between routers without assigning specific IP addresses to the interfaces. Instead, it uses the loopback address or another router identifier for the BGP session, making IP address management more straightforward in large-scale networks.
* Family inet Configuration:
* Option C:The family inet configuration is required on each interface involved in unnumbered BGP peering to support IPv4 address families. This ensures that IPv4 peering sessions can be established between devices.
* Automatic IPv4 Peering:
* Option D:Unnumbered BGP peering automatically provisions IPv4 peering sessions. This simplifies the configuration by eliminating the need to manually assign and manage IP addresses for BGP peering.
Conclusion:
* Option C:Correct-Unnumbered BGP requires the family inet configuration for IPv4.
* Option D:Correct-Unnumbered BGP automatically provisions IPv4 peering, simplifying setup.
NEW QUESTION # 42
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