JPR-961 Sample Questions & Answers
Free JNCIE-SP practice questions with worked answers and explanations. See how the ExamJungle simulator prepares you — then jump into the full test.
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- Question 1Advanced
Edge Services · EVPN
In a Junos EVPN-MPLS environment, you need to ensure that when a CE device is multi-homed to two PE routers (PE1 and PE2) in an All-Active mode, traffic from the remote PE is load-balanced to both PE1 and PE2. Which EVPN route type is primarily responsible for advertising the multi-homing capability and the Ethernet Segment Identifier (ESI) to the remote PEs?
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Correct answer: C
Type 1 routes (Ethernet Auto-Discovery) are used to advertise the ESI and the MPLS label associated with the Ethernet Segment. They facilitate mass withdrawal and aliasing (load balancing). The remote PE uses Type 1 routes to learn that the ESI is reachable via multiple PEs, enabling ECMP toward the multi-homed segment.
- Question 2IntermediateSelect 2
System Management and Monitoring · Junos Telemetry Interface
You are implementing a sophisticated telemetry solution using Junos Telemetry Interface (JTI). You want to stream data using the gRPC protocol with Protocol Buffers encoding. Which two configuration steps are required to enable the gRPC server on the Junos device? (Select TWO)
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Correct answers: B, C
While
clear-textorsslenables the service, defining the connection parameters within theextension-servicehierarchy is the standard method for activating the gRPC interface for JTI.To enable the internal gRPC server, you must configure the extension-service under
system services. This allows the device to listen for incoming subscription requests via gRPC. - Question 3Beginner
Core Technologies · IS-IS
True or False: In an IS-IS network, setting the overload bit on a router stops that router from sending any IS-IS Hello PDUs, effectively removing it from the topology entirely.
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Correct answer: B
The overload bit prevents the router from being used as a transit node for traffic destined to other parts of the network, but it continues to form adjacencies and advertise its own directly connected prefixes (IP and CLNS addresses). It does NOT stop sending Hello PDUs.
- Question 4Intermediate
Edge Services · Layer 2 VPNs
You are configuring a BGP-signaled VPLS (Kompella VPLS) between two PE routers. The VPLS connection is not coming up. The
show vpls connectionscommand displays the status as 'OL' (Originator ID mismatch) or 'no-remote-site'. You verify that the Route Distinguishers are unique. Which parameter must match on both PE routers for the specific VPLS instance to establish a connection?Show answer & explanation
Correct answer: C
In BGP-signaled VPLS, the
vpn-id(often derived from the route-target community) identifies the VPN instance. If the import and export route targets do not align (typically they are the same in a full mesh), the PEs will not import each other's VPLS routes. The site IDs must be unique, not the same. - Question 5Intermediate
Core Technologies · RSVP
You are deploying an RSVP-TE based MPLS core. You want to enable a protection mechanism that creates a bypass LSP around a failed node. This bypass should protect all LSPs traversing that specific node. Which RSVP configuration command enables this behavior on the transit routers?
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Correct answer: C
- Question 6Beginner
Core Technologies · BGP
Review the following scenario:
You are troubleshooting a BGP route propagation issue in an IBGP mesh. Router A advertises a prefix to Router B (Route Reflector). Router B receives the route but does not reflect it to its client, Router C.
Upon checking Router B, you see the route is valid but 'hidden'. The detail shows 'Next hop is not resolved'.
Which technology should be implemented to ensure the BGP next-hop (which is the loopback of Router A) is reachable across the MPLS core?
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Correct answer: B
BGP routes require their next-hop address to be resolvable in the
inet.0(orinet.3for VPNs) table. In an MPLS core, this reachability is typically provided by the IGP (for IP reachability) and LDP or RSVP (for label reachability if it's a VPN route). If the next-hop is not in the routing table, BGP marks the route as hidden and unusable.
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