As shown in the figure, when PE1 receives an ARP request packet, it forwards the packet to PE4. The packet then carries two labels. The label value 201 is carried by the EVPN Type ____ route. (Enter only digits.)
Correct Answer:
3 Explanation: Understanding EVPN (Ethernet VPN) Label Allocation and ARP Handling # What Happens in This Scenario?1## CE1 (192.168.1.1) sends an ARP request to discover the MAC address of CE2 (192.168.1.2).2## PE1 receives the ARP request and needs to forward it over the EVPN fabric.3## To send the broadcast ARP request across the EVPN network, PE1 forwards the packet to PE4 using BUM (Broadcast, Unknown unicast, and Multicast) forwarding.4## PE4, as the Designated Forwarder (DF), forwards the ARP request to CE2. Role of Labels in EVPN VXLAN/MPLS Networks # EVPN uses BGP to distribute MAC/IP reachability information using different route types. # EVPN Type 2 Route (MAC/IP Advertisement Route): * Used for MAC-to-IP address mapping announcements. * Ensures remote VTEPs (PE routers) learn MAC-to-IP bindings dynamically. # EVPN Type 3 Route (Inclusive Multicast Route): * Used for BUM traffic (Broadcast, Unknown Unicast, Multicast). * Assigns a multicast label (e.g., 201) to be used for forwarding broadcast packets like ARP requests. # In this case: * The label 201 is used for BUM traffic forwarding. * BUM traffic is handled using an EVPN Type 3 route. Why is the Answer 3? # EVPN Type 3 routes carry labels for BUM traffic, which includes ARP requests.# Label 201 is used for multicast distribution, which is managed by Type 3 routes. Real-World Application: * VXLAN Data Centers: Uses EVPN Type 3 routes to control BUM traffic efficiently. * Campus Networks: Prevents unnecessary flooding of ARP requests across VXLAN domains. # Reference: Huawei HCIE-Datacom Guide - EVPN BGP Route Types and Multicast Labeling
Question 82
IsIS IPv6 cost 50 is configured under the interface, and the meaning of the command is ?
Correct Answer: C
Question 83
The following description of BGP load sharing is wrong with ?( Multiple choice question)
Correct Answer: A,B,C,D
Question 84
What are the ways to divide VLANs in Huawei switches? ( Multi-select)
Correct Answer: A,C,D,E
Question 85
Regarding Policy Routing, the following description error is ?( Single choice questions).
