Free JPR-981 sample questions

Correct answer: Apply a policy with 'then load-balance per-flow' to the routing-options forwarding-table export list

In Junos, to enable ECMP (Equal-Cost Multipath) load balancing, you must define a policy that sets the action 'load-balance per-flow' and apply this policy to the forwarding table via 'set routing-options forwarding-table export '. Without this, Junos installs only one next-hop in the forwarding table even if multiple routes exist in the routing table.

Correct answer: Create a Configlet with the template text and import it into the Blueprint

Configlets in Juniper Apstra are small snippets of configuration text (CLI) used to deploy configurations that are not covered by the standard Reference Design (Blueprint). You create the Configlet in the Global Catalog and then import/apply it to the specific Blueprint and devices.

Correct answer: Type 1 (Ethernet Auto-Discovery)

EVPN Type 1 routes (Ethernet Auto-Discovery) are used for Aliasing and Mass Withdrawal. The A-D per EVI route advertises the reachability of the ESI. Remote VTEPs use this to load balance traffic to all VTEPs sharing the same ESI, even if a specific MAC (Type 2) has only been learned/advertised by one of the PE devices, a feature known as Aliasing.

Correct answer: The Router MAC of the remote gateway is not being rewritten in the inner ethernet header.

In Seamless VXLAN stitching (interconnect gateway), the border leaf must decapsulate the VXLAN packet from the internal fabric and re-encapsulate it for the DCI tunnel. A critical step is rewriting the inner destination MAC address to match the Router MAC of the remote DCI gateway. If this rewrite does not happen or the Router MAC community is missing/incorrect, the remote gateway will drop the packet.

Correct answer: BFD (Bidirectional Forwarding Detection)

BFD (Bidirectional Forwarding Detection) is a protocol designed to detect faults in the bidirectional path between two forwarding engines. It provides low-overhead, short-duration detection of failures in the path between adjacent forwarding engines, allowing for sub-second failure detection.

Correct answer: IBA (Intent Based Analytics) Probes

Intent Based Analytics (IBA) in Apstra uses Probes to collect telemetry data and Processors to analyze that data. It continuously compares the real-time state of the network against the intended state defined in the Blueprint (the Intent). If a discrepancy is found (like a missing route), an Anomaly is raised.