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| Section | Objectives |
|---|---|
| EVPN and VXLAN Data Center Fabric | - EVPN route types and MAC/IP advertisement - VXLAN data plane and encapsulation - EVPN control plane fundamentals |
| Operations, Troubleshooting and Best Practices | - Troubleshooting BGP EVPN and VXLAN issues - Monitoring SR Linux and EVPN environments - Network optimization and scaling considerations |
| Data Center Interconnect (DCI) | - L2 and L3 DCI design patterns - EVPN-based interconnect solutions - Redundancy and high availability strategies |
| BGP and Routing in Data Center Environments | - BGP EVPN address families - Route reflection and scaling design - Interoperability between routing domains |
| SR Linux Architecture and Fundamentals | - SR Linux system architecture and components - Network operating system concepts and containerized routing functions - Configuration and operational models |
>> Valid Braindumps Nokia 4A0-D03 Questions <<
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NEW QUESTION # 45
When providing L3 multi-homing on two or more leaf routers, which of the following is FALSE?
Answer: A
Explanation:
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
Layer 3 multi-homing is fundamentally about redundant or load-balanced L3 reachability for external prefixes, not about Layer 2 broadcast-domain flooding toward a host. In single-active L3 multi-homing, DF election determines which attached leaf is active for the Ethernet Segment, and only that leaf advertises or forwards for the attached customer route as required by the redundancy model. In all-active L3 multi-homing, multiple leaf routers can be valid next-hops for the same learned third-party prefix, and remote PEs may load-balance toward them based on the Ethernet Segment association. Learned external prefixes are carried as EVPN route type 5 IP Prefix routes, which is the correct route type for L3 reachability. The Ethernet Segment is associated with the next-hop for those prefixes so that remote PEs understand the multi-homed nature of the path. Option B is false because BUM forwarding is a Layer 2 EVPN concern. In an all-active L3 multi-homing scenario, DF election is not used to identify a BUM-forwarding leaf for host traffic in the same way it is used in Layer 2 multi-homing services. Reference: L3 EVPN multi-homing, RT-5 prefix routes, ES next-hop behavior.
NEW QUESTION # 46
Which of the following statements about the Layer 2 EVPN configuration/operation in a Nokia SR Linux is FALSE?
Answer: D
Explanation:
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
In SR Linux, a Layer 2 EVPN service is implemented using a MAC-VRF network instance. The MAC-VRF represents the tenant bridge domain and is associated with access subinterfaces and a VXLAN data-plane mapping. Local hosts are learned through the data plane when Ethernet frames arrive on local interfaces. Remote hosts, however, are not learned by flooding or by configuring static per-peer VXLAN interfaces. They are learned through MP-BGP EVPN updates, especially EVPN route type 2 MAC/IP Advertisement routes. Option B is false because SR Linux does not require a separate manually configured VXLAN interface toward each remote VTEP for the MAC-VRF. Instead, the MAC-VRF is bound to VXLAN encapsulation and a VNI, while remote VTEPs and their MAC reachability are discovered dynamically through the EVPN control plane. This is one of the central advantages of EVPN compared with static VXLAN flood-and-learn models: the overlay endpoints and endpoint reachability are signaled through BGP, reducing manual configuration and improving scale. Reference: SR Linux L2 EVPN MAC-VRF configuration, MP-BGP EVPN learning, VXLAN data-plane mapping.
NEW QUESTION # 47
Consider the exhibit.
Which of the following statements is FALSE?
Answer: A
Explanation:
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
In an SR Linux Layer 2 EVPN MAC-VRF, locally attached MAC addresses are learned through the data plane on local access interfaces, while remote MAC addresses are learned from MP-BGP EVPN control-plane advertisements and installed with a VXLAN next-hop. The exhibit shows one local learned MAC on an Ethernet subinterface and another MAC learned through EVPN with a VXLAN interface and VNI 100. The remote VTEP or next-hop information identifies the remote endpoint, and the VNI maps the received VXLAN traffic to the correct MAC-VRF service. The false statement is C because saying that the MAC address associated with the vxlan-interface "will not age out" is too absolute. A remote EVPN MAC is not aged in the same way as a local data-plane-learned MAC, but it can still be removed when the corresponding EVPN route is withdrawn, invalidated, or no longer present in the control plane. The "N/A" style aging behavior does not mean permanent retention. Reference: SR Linux MAC-VRF verification, local MAC learning, EVPN-learned remote MACs, VXLAN VNI mapping.
NEW QUESTION # 48
Consider the exhibit.
Which of the following statements about the configuration and operation of this setup is TRUE?
Answer: D
Explanation:
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
This setup represents a Layer 2 EVPN multi-homing attachment where the host is connected to Leaf1 and Leaf2 through an Ethernet Segment named ES-1. In SR Linux EVPN multi-homing, the Ethernet Segment must be associated with the physical or logical attachment interfaces facing the host. This allows the PEs to advertise Ethernet Segment information into EVPN, participate in DF election, and apply the appropriate forwarding behavior for single-active or all-active redundancy. Option D is therefore correct. Option A is not necessarily true because the exhibit indicates an active/standby style attachment, not all-active operation. Option B is also incorrect because ECMP on the remote MAC-VRF is not the mechanism that defines the local ES association or single-active behavior. Option C is wrong in this setup because a host LAG is required for common all-active L2 multi-homing with LACP, but the shown design uses an active/standby-style attachment where the Ethernet Segment is bound to the host-facing ports. The technical anchor is that ES-1 must be associated to the access ports connecting the host into the multi-homed MAC-VRF service. Reference: L2 EVPN multi-homing, Ethernet Segment interface association, DF behavior.
NEW QUESTION # 49
Which of the following statements about configuring and using an integrated routing and bridging (IRB) interface is TRUE?
Answer: D
Explanation:
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
An IRB interface is the logical connection point between a Layer 2 MAC-VRF and a Layer 3 IP-VRF. It provides the routed gateway function for hosts in the bridge domain while allowing traffic to move into the routed VRF for inter-subnet forwarding. The correct statement is that when an IRB sub-interface has multiple IP addresses, one can be designated as the primary. This is important because the primary address is used for normal gateway or subnet behavior when more than one address is present on the same routed interface context. Option A is inaccurate because the question is about an IRB sub-interface, not a generic subinterface selection between bridge or routed access modes. Option B is not the defining multi-homing model; EVPN multi-homing is implemented through Ethernet Segment association and MAC-VRF attachment behavior, not by adding multiple IRB subinterfaces for multi-homing. Option D is also wrong because the IRB is the shared logical link between the MAC-VRF and IP-VRF; the design does not require separate IRB subinterfaces on each side as independent constructs. Reference: SR Linux IRB configuration, MAC-VRF to IP-VRF interconnection, primary IP addressing.
NEW QUESTION # 50
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