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| Section | Weight | Objectives |
|---|---|---|
| Layer 3 EVPN Services | 25% | - Symmetric and asymmetric routing - VRF integration and route targets - EVPN Route Type 5 |
| Data Center Interconnect (DCI) Solutions | 25% | - BGP route policies and route reflectors - Gateway-less EVPN DCI - Interoperability with Nokia 7750 SR |
| SR Linux and EVPN Fundamentals | 25% | - EVPN control plane and MP-BGP - SR Linux architecture and CLI - VXLAN encapsulation and underlay |
| Layer 2 EVPN Services | 25% | - Multi-homing and Ethernet Segments - EVPN Route Types 1โ4 - Anycast Gateway and IRB |
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NEW QUESTION # 32
When PEs are connected to an Ethernet segment with at least one active MAC-VRF, which of the following statements about the AD per EVI updates sent by a PE 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]:
Ethernet Auto-Discovery per EVI routes are EVPN route type 1 advertisements used in multi-homing at the service-instance level. A PE sends an AD per EVI route for each MAC-VRF associated with the Ethernet Segment. These routes allow remote PEs to understand that the advertising PE has reachability to a given EVI through the shared ES. They are also used for aliasing and fast convergence, because a remote PE can treat multiple attached PEs as valid paths for traffic toward the same multihomed segment. In VXLAN EVPN, the update can include data-plane information such as the VNI, and it carries route-target information so the route is imported into the correct MAC-VRF. Option B is false because the multi-homing type or redundancy mode is not carried in the AD per EVI update as stated. Redundancy behavior is associated with Ethernet Segment-level signaling and configuration, especially ES discovery and related route attributes, not with AD per EVI as the mechanism that declares the multi-homing type. Reference: EVPN RT-1 AD per EVI, MAC-VRF association, route target, VNI, aliasing.
NEW QUESTION # 33
Which of the following statements about PE-CE routing 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]:
PE-CE routing is the mechanism used to exchange customer prefix reachability between a provider edge or data center leaf and the attached customer edge router. It can be implemented statically or dynamically. Static routing is operationally simple but does not scale well when many prefixes or frequent changes are involved. BGP is preferred for larger deployments because it supports policy, route filtering, attributes, and automated advertisement of changing reachability. In most EVPN PE-CE designs, eBGP is preferred because it creates a clean routing boundary between the PE and CE, with each device operating in a different autonomous system. Option D is false because the CE does not advertise BGP EVPN route type 5 updates to the PE. The CE advertises ordinary IPv4 or IPv6 unicast prefixes over the PE-CE routing session. The PE then imports those customer prefixes into the IP-VRF and advertises them into the EVPN overlay as route type 5 IP Prefix routes toward other PEs. This distinction matters: EVPN signaling is a PE-to-PE overlay function, not a CE-originated EVPN control-plane role. Reference: PE-CE routing, eBGP, EVPN RT-5 prefix advertisement.
NEW QUESTION # 34
A host is connected to multiple PEs through multi-homing.
Which of the following is NOT a function of the EVPN route-type 4 route?
Answer: B
NEW QUESTION # 35
When PEs are connected to an Ethernet segment with at least one active MAC-VRF, which of the following statements about the AD per EVI updates sent by a PE 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]:
Ethernet Auto-Discovery per EVI information is used in EVPN multi-homing to advertise that a PE has reachability to a particular Ethernet Segment for a specific EVPN instance. Remote PEs use this information for aliasing, allowing them to forward known unicast traffic toward a multi-homed Ethernet Segment through eligible PEs rather than relying only on the PE that advertised a specific MAC route. In VXLAN-based EVPN, the update also carries information needed by remote peers to select the proper data-plane encapsulation and VNI for the service. The multi-homing behavior advertised with the Ethernet Segment enables remote peers to understand whether the attachment is operating in all-active or single-active mode. Option D is the false statement in this context because route-target handling is a general BGP EVPN import/export mechanism associated with VPN route policy and extended communities; it is not the specific operational function that defines AD per EVI behavior. The AD per EVI route's purpose is Ethernet Segment reachability for an EVI, not route-target-based service identification by itself. Reference: EVPN route type 1, AD per EVI, aliasing and multi-homing signaling.
NEW QUESTION # 36
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]:
In asymmetric L3 EVPN routing, the ingress PE performs the routing decision and then sends traffic across the overlay in the context of the destination MAC-VRF. The egress PE performs Layer 2 MAC forwarding only toward the destination host. This is why options A and B correctly describe asymmetric data-plane behavior. Asymmetric routing relies heavily on EVPN route type 2 MAC/IP Advertisement routes because the ingress PE must know the destination host's MAC/IP binding and the destination bridge domain information. EVPN route type 5, which advertises IP prefixes, is a symmetric L3 EVPN mechanism and is not mandatory for asymmetric routing. Therefore, option C is false. Option D is treated as correct in this asymmetric-routing model because each PE participating in inter-subnet forwarding needs the destination MAC-VRF context to encapsulate traffic toward the correct L2 VNI. This requirement is one reason asymmetric routing scales less efficiently than symmetric routing: MAC-VRF presence and host reachability information must be broadly available. Symmetric routing improves scale by using an IP-VRF routed VXLAN interface and RT-5 prefix routes instead. Reference: asymmetric L3 EVPN routing, ingress IP/MAC forwarding, egress MAC forwarding, RT-2 versus RT-5 usage.
NEW QUESTION # 37
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