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| Section | Objectives |
|---|---|
| Topic 1: BGP and Routing in Data Center Environments | - Interoperability between routing domains - Route reflection and scaling design - BGP EVPN address families |
| Topic 2: Operations, Troubleshooting and Best Practices | - Monitoring SR Linux and EVPN environments - Network optimization and scaling considerations - Troubleshooting BGP EVPN and VXLAN issues |
| Topic 3: EVPN and VXLAN Data Center Fabric | - EVPN route types and MAC/IP advertisement - EVPN control plane fundamentals - VXLAN data plane and encapsulation |
| Topic 4: Data Center Interconnect (DCI) | - EVPN-based interconnect solutions - L2 and L3 DCI design patterns - Redundancy and high availability strategies |
| Topic 5: SR Linux Architecture and Fundamentals | - Configuration and operational models - Network operating system concepts and containerized routing functions - SR Linux system architecture and components |
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NEW QUESTION # 53
Consider the exhibit.
Which of the following is NOT configured on dcgw10 to support the Layer 3 VPN connectivity?
Answer: B
Explanation:
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
In an integrated gateway-based data center interconnect design, the gateway must interwork between the data center EVPN/VXLAN domain and the WAN VPN transport domain. For Layer 3 VPN connectivity on a Nokia 7750 SR integrated gateway, the base BGP instance must support the relevant VPN address families, such as VPN-IPv4 and EVPN, because the gateway participates in control-plane exchange between the data center and WAN sides. The VPRN must also be associated with the WAN transport, normally through MPLS tunnel binding, and the VRF target must match the corresponding VPRN on the remote gateway so that VPN routes are imported and exported correctly. A routed VXLAN interface, however, is an SR Linux IP-VRF/VXLAN construct used for symmetric L3 EVPN forwarding inside a VXLAN-based data center fabric. In this question, dcgw10 is acting as the integrated WAN gateway for L3VPN connectivity, so a routed VXLAN interface is not the required configuration item on the VPRN instance. Reference: integrated gateway DCI, VPRN over MPLS, EVPN-to-VPN interworking.
NEW QUESTION # 54
Consider the exhibit.
All IP-VRFs are configured properly and are operational.
Which of the following statements is FALSE?
Answer: B
Explanation:
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
In a single-active EVPN multi-homing design, the connected PE routers perform Designated Forwarder election to determine which PE is active for the relevant service or Ethernet Segment. The DF is responsible for forwarding toward the attached segment and, in a Layer 3 multi-homing case, only the active/DF PE advertises the customer IP prefix route toward the EVPN control plane. Single-active redundancy is communicated using Ethernet Segment-related EVPN procedures, including Ethernet A-D information, so remote PEs can identify the redundancy behavior and avoid forwarding traffic to an inactive attachment. The false statement is that the elected DF uses an AD per EVI update to identify itself as primary. AD per EVI is primarily used to advertise per-service Ethernet Segment reachability and support aliasing/load-balancing behavior in multi-homed services. DF election itself is driven by Ethernet Segment route procedures, not by the DF declaring itself primary through AD per EVI. Therefore, option B misstates the role of AD per EVI in the single-active L3 multi-homing control plane. Reference: EVPN DF election, single-active multi-homing, Ethernet A-D routes.
NEW QUESTION # 55
Which of the following statements about utilizing asymmetric routing in an L3 EVPN network is FALSE?
Answer: B
Explanation:
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
Asymmetric routing relies heavily on host MAC/IP information because the ingress PE performs routing into the destination subnet and then sends the frame across the overlay using the destination MAC-VRF/VNI. This means PEs require enough ARP and MAC/IP binding information to forward traffic toward remote hosts correctly. If a host has multiple IP addresses on the same interface, separate EVPN route type 2 advertisements may be needed to communicate each IP-to-MAC binding. The ingress and egress PEs participate in MAC and IP forwarding across the end-to-end service path, but the forwarding responsibilities differ by direction and stage. The false statement is option C. The statement says all MAC-VRFs connected to the L3 EVPN network must exist on each PE, but that is not the correct requirement in this question's verified answer set. In practical EVPN designs, the exact MAC-VRF placement depends on whether the service is implemented as asymmetric, symmetric, interface-less, or interface-ful routing. Here, the course answer marks the universal MAC-VRF requirement as false. Reference: asymmetric L3 EVPN routing, RT-2 MAC/IP advertisements, ARP and MAC forwarding behavior.
NEW QUESTION # 56
Which of the following statements about the configuration of a distributed Layer 2 EVPN in a Nokia SR Linux is FALSE?
Answer: B
Explanation:
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
A distributed Layer 2 EVPN in SR Linux is implemented using MAC-VRF network instances, EVPN control-plane signaling, and VXLAN data-plane encapsulation. A common mistake is assuming that every PE must use the same EVI value for the same L2 service. In SR Linux, the important operational requirement is that the correct EVPN routes are imported and exported using matching route-target policy, not necessarily that every PE has the same locally configured EVI. Therefore, option A is false. The route distinguisher can be automatically generated using local values such as the autonomous system number and EVI, giving each PE's EVPN routes uniqueness in MP-BGP. A MAC-VRF is associated with VXLAN encapsulation for its data-plane service mapping, and route targets may need to be manually configured when leaf routers are in different autonomous systems because automatic derivation may not produce matching import/export policy across AS boundaries. The key separation is this: the RD gives uniqueness, the route target controls service membership, and the EVI is a local service identifier rather than a universal mandatory match in all designs. Reference: SR Linux distributed L2 EVPN configuration, EVI, RD auto-generation, route-target policy.
NEW QUESTION # 57
Leaf routers are configured to support Layer 2 multi-homing all-active mode.
Which of the following statements is FALSE?
Answer: C
Explanation:
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
In all-active Layer 2 EVPN multi-homing, the host is typically dual-homed to two or more leaf routers using a LAG. The participating leaf routers must configure the LAG and associate it with the Ethernet Segment so EVPN can advertise the common ESI and apply aliasing, split-horizon, and DF procedures. If VLAN tagging is used for service separation, tagging must be configured on the LAG interface so that the correct subinterfaces can bind into the MAC-VRF and Ethernet Segment. Option C is false because it states that the LACP system-id-mac must uniquely identify each leaf router. In an all-active EVPN multihomed LAG, the opposite principle applies: from the host's LACP perspective, the multihomed leaf pair must appear as a single logical LACP system. That generally requires a shared LACP system ID or coordinated system MAC behavior across the participating PEs. If each leaf presented a unique LACP system identity, the host would treat them as separate LAG partners and the all-active bundle would not form correctly. Reference: all-active L2 EVPN multi-homing, LAG attachment, LACP system ID behavior, Ethernet Segment association.
NEW QUESTION # 58
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