You want to provide a OCI that keeps each data center routing domain isolated, while also supporting translation of VNIs. Which DCI scheme allows these features?
Answer(s): C
Understanding DCI (Data Center Interconnect) Schemes:DCI schemes are used to connect multiple data centers, enabling seamless communication and resource sharing between them. The choice of DCI depends on the specific requirements, such as isolation, VNI translation, or routing domain separation.VXLAN Stitching:VXLAN stitching involves connecting multiple VXLAN segments, allowing VNIs (VXLAN Network Identifiers) from different segments to communicate with each other while maintaining separate routing domains.This approach is particularly effective for keeping routing domains isolated while supporting VNI translation, making it ideal for scenarios where you need to connect different data centers or networks without merging their control planes.Other Options:A . MPLS DCI label exchange: This option typically focuses on MPLS-based interconnections and does not inherently support VNI translation or isolation in the context of VXLAN.B . Over the top (OTT) with VNI translation enabled: This could support VNI translation but does not inherently ensure routing domain isolation.D . Over the top (OTT) with proxy gateways: This typically involves using external gateways for traffic routing and may not directly support VNI translation or isolation in the same way as VXLAN stitching.Data Center
VXLAN stitching is a powerful method in multi-data center environments, allowing for flexibility in connecting various VXLAN segments while preserving network isolation and supporting complex interconnect requirements.
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?
Answer(s): D
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 in the 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 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
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.
What are two ways in which an EVPN-signaled VXLAN is different from a multicast-signaled VXLAN? (Choose two.)
Answer(s): B,C
Multicast-Signaled VXLAN:In traditional multicast-signaled VXLAN, VTEPs (VXLAN Tunnel Endpoints) use multicast to flood and learn about remote VTEPs. This method relies on multicast in the underlay network to distribute BUM (Broadcast, Unknown unicast, and Multicast) traffic. This approach can be resource-intensive due to the need for multicast group management and increased network traffic, especially in large deployments.EVPN-Signaled VXLAN:EVPN-signaled VXLAN uses BGP (Border Gateway Protocol) to signal the presence of VTEPs and distribute MAC address information. BGP is used for VTEP autodiscovery and the distribution of endpoint information.This method is more efficient because it reduces the reliance on multicast, instead using BGP control- plane signaling to handle VTEP discovery and MAC learning, which reduces the overhead on the network and improves scalability.Correct Statements:B . An EVPN-signaled VXLAN can perform autodiscovery of VTEPs using BGP: This is correct because EVPN uses BGP for VTEP autodiscovery, making it more efficient and scalable compared to multicast-based methods.C . An EVPN-signaled VXLAN is less resource-intensive: This is correct because it eliminates the need for multicast flooding in the underlay, instead using BGP for signaling, which is less demanding on network resources.Incorrect Statements:A . An EVPN-signaled VXLAN can perform autodiscovery of VTEPs using IS-IS: This is incorrect because EVPN relies on BGP, not IS-IS, for VTEP discovery and signaling. D . An EVPN-signaled VXLAN features slower and more complete convergence: This is incorrect; EVPN with BGP typically provides faster convergence due to its use of a control plane rather than relying on data plane learning.Data Center
EVPN-VXLAN is widely adopted in modern data center designs due to its scalability, efficiency, and reduced resource consumption compared to multicast-based VXLAN solutions. It leverages the strengths of BGP for control-plane-driven operations, resulting in more efficient and scalable networks.
You are implementing VXLAN broadcast domains in your data center environment. Which two statements are correct in this scenario? (Choose two.)
Answer(s): A,C
VXLAN Overview:VXLAN (Virtual Extensible LAN) is a network virtualization technology that encapsulates Layer 2 Ethernet frames into Layer 3 UDP packets for transmission over an IP network. It allows the creation of Layer 2 overlay networks across a Layer 3 infrastructure.Understanding VXLAN Components:VTEP (VXLAN Tunnel Endpoint): A VTEP is responsible for encapsulating and decapsulating Ethernet frames into and from VXLAN packets.VNI (VXLAN Network Identifier): A 24-bit identifier used to distinguish different VXLAN segments, allowing for up to 16 million unique segments.Correct Statements:C . Layer 2 frames are encapsulated by the source VTEP: This is correct. In a VXLAN deployment, the source VTEP encapsulates the original Layer 2 Ethernet frame into a VXLAN packet before transmitting it over the IP network to the destination VTEP, which then decapsulates it. A . A VXLAN packet does not contain a VLAN ID: This is correct. The VXLAN header does not carry the original VLAN ID; instead, it uses the VNI to identify the network segment. The VLAN ID is local to the switch and does not traverse the VXLAN tunnel.Incorrect Statements:B . The VNI must match the VLAN tag to ensure that the remote VTEP can decapsulate VXLANpackets: This is incorrect. The VNI is independent of the VLAN tag, and the VLAN ID does not need to match the VNI. The VNI is what the remote VTEP uses to identify the correct VXLAN segment. D . The VNI is a 16-bit value and can range from 0 through 16,777,215: This is incorrect because the VNI is a 24-bit value, allowing for a range of 0 to 16,777,215.Data Center
VXLAN technology is critical for modern data centers as it enables scalability and efficient segmentation without the constraints of traditional VLAN limits.
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Amelio commented on November 04, 2024 Big win for me this week. I passed my exam and now getting ready for my second exam. UNITED STATES upvote
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