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Nokia 4A0-D03 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Data Center Interconnect (DCI) Solutions | 25% | - Interoperability with Nokia 7750 SR - BGP route policies and route reflectors - Gateway-less EVPN DCI |
| SR Linux and EVPN Fundamentals | 25% | - SR Linux architecture and CLI - EVPN control plane and MP-BGP - VXLAN encapsulation and underlay |
| Layer 2 EVPN Services | 25% | - EVPN Route Types 1–4 - Multi-homing and Ethernet Segments - Anycast Gateway and IRB |
| Layer 3 EVPN Services | 25% | - VRF integration and route targets - EVPN Route Type 5 - Symmetric and asymmetric routing |
Nokia SR Linux EVPN and Data Center Interconnect Sample Questions:
1. Consider the exhibit.
All three of the leafs have a MP-BGP EVPN session to the route-reflector Spine-1. Leaf-1, Leaf-2 and Leaf-3 have existing instances of an L2 EVPN named MAC VRF-1. Host-1 has just sent its first Ethernet frame into MAC VRF-1 on Leaf-1.
Which of the following steps is FALSE?
A) Leaf-1 populates Host-1's MAC address learnt on the local interface to its MAC table.
B) The route-reflector forwards the EVPN update to Leaf-2 and Leaf-3.
C) Leaf-1 generates an EVPN route-type 5 update with Host-1's MAC address and sends it to the route reflector.
D) Leaf-2 and Leaf-3 import the EVPN update based upon the route target.
2. Which of the following statements about the configuration of a Layer 3 multi-homing with a centralized router is FALSE?
A) All routers participating in the Ethernet segment must have the multi-homing mode set to all-active.
B) The centralized router must be a member of the Ethernet segment.
C) The centralized router will advertise the customer prefixes using an EVPN route-type 5 update.
D) Remote leaf routers can load balance traffic to customer prefixes through the leaf routers connected to the Ethernet segment.
3. Consider the exhibit.
Which of the following statements about the operation of all-active multi-homing is FALSE?
A) The host can forward BUM traffic to either Leaf1 or Leaf2.
B) The Ethernet segment on Leaf1 and Leaf2 is associated to lag 1.
C) Both Leaf1 and Leaf2 can forward BUM traffic to the host.
D) Leaf3 can load balance traffic between Leaf1 and Leaf2 when ECMP is enabled on the MAC-VRF.
4. Which EVPN route-type (RT) is used in multi-homing scenarios to support aliasing and fast convergence?
A) RT-1 Ethernet Auto-Discovery
B) RT-2 MAC/IP Advertisement
C) RT-3 Inclusive Multicast Ethernet Tag
D) RT-4 Ethernet Segment
5. Which of the following statements describes the function or operation of the integrated gateway-based data center interconnect solution?
A) The route reflectors in the different data centers must be able to reach each other.
B) The data center gateway and the WAN PE functions are performed on a single router.
C) The VXLAN tunnels are required between the leaf routers in the different data centers.
D) All the data center leaf routers must be reachable over the WAN network.
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: A | Question # 3 Answer: D | Question # 4 Answer: A | Question # 5 Answer: B |



