Free JN0-481 sample questions

Correct answer: EVPN Route Type 2 (MAC/IP Advertisement Route) because it distributes both the MAC and /32 IP address of the host, enabling the leaf switches to perform symmetric IRB for optimal inter-VLAN routing.

In an ERB design, EVPN Type 2 routes advertise both the MAC and IP address (as a /32 route) of a host. This allows leaf switches acting as anycast gateways to populate their ARP and routing tables, enabling symmetric Integrated Routing and Bridging (IRB). When a VM moves, a new Type 2 route is advertised, ensuring traffic is routed directly to the new leaf without tromboning.

Correct answers: Use eBGP for the underlay to ensure optimal path selection and ECMP scalability.; Use iBGP for the overlay with route reflectors located on the spine switches to distribute EVPN NLRIs.

Juniper's best practices for scalable IP fabrics recommend using eBGP for the underlay due to its robust policy control, scalability, and excellent Equal Cost Multi-Path (ECMP) support.

For the overlay, iBGP is typically used to carry EVPN routes, often with the spine switches acting as route reflectors to minimize the peering mesh between leaf switches.

Correct answer: False

A key advantage of VXLAN is the decoupling of the overlay VNI from the local VLAN ID. Different leaf switches can map the same global VNI to different locally significant VLAN IDs based on their specific configuration and port requirements.

Correct answer: Route Target (RT)

The Route Target (RT) is an extended BGP community used to control the import and export of routes into specific VRFs (routing instances). If Tenant A's routes are appearing in Tenant B's VRF, it indicates that Tenant B's VRF import policy is incorrectly matching and importing Tenant A's Route Target.

Correct answer: To uniquely identify a logical link aggregation group connecting a dual-homed server to multiple leaf switches.

The Ethernet Segment Identifier (ESI) is a 10-byte value used in EVPN to uniquely identify an Ethernet Segment, which is typically a connection from a multi-homed device (like a server using LACP) to two or more leaf switches. This enables active-active forwarding and prevents loops.

Correct answer: It encapsulates and de-encapsulates Layer 2 Ethernet frames into Layer 3 UDP/IP packets.

A VTEP (Virtual Tunnel Endpoint) is responsible for originating and terminating VXLAN tunnels. It encapsulates original Layer 2 frames from connected hosts into VXLAN/UDP/IP packets for transport across the Layer 3 underlay network, and de-encapsulates them upon receipt.