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Question 1

Score: 0/0

Which RSVP-TE object is used to express bandwidth requirements and priority values for an LSP during path establishment?

LABEL_REQUEST

SESSION_ATTRIBUTE

SENDER_TSPEC

ADSPEC

to track

2026 Statistics

Key Facts: JNCIP-SP Exam

50-60%

Est. Pass Rate

Industry estimate

65 Q's

Exam Questions

Juniper

90 min

Exam Duration

Juniper

$400

Exam Fee

Juniper

3 years

Cert Valid

Juniper

150-250 hrs

Study Time

Recommended

JNCIP-SP is Juniper's professional-level service provider certification. The exam has 65 questions in 90 minutes covering advanced MPLS TE, L3VPN, VPLS, MVPN, Segment Routing, IS-IS/OSPF, BGP policy, and CoS. JNCIS-SP is required as a prerequisite. It validates the skills needed to design and operate large-scale SP MPLS networks.

Sample JNCIP-SP Practice Questions

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1Which RSVP-TE object is used to express bandwidth requirements and priority values for an LSP during path establishment?

A.LABEL_REQUEST

B.SESSION_ATTRIBUTE

C.SENDER_TSPEC

D.ADSPEC

Explanation: The SENDER_TSPEC object carries the traffic specification, including peak and average bandwidth, for an RSVP-TE LSP. Routers use this to perform call admission control. SESSION_ATTRIBUTE carries setup/hold priorities and flags like SE-style reservation. LABEL_REQUEST signals that a label binding is needed. ADSPEC carries path latency and bandwidth availability data.

2A Junos router is configured with RSVP-TE admin groups. An LSP has 'exclude-any' set to include the 'maintenance' admin group. What is the expected CSPF behavior?

A.CSPF excludes all links that are NOT in the 'maintenance' group

B.CSPF excludes all links that belong to the 'maintenance' admin group

C.CSPF only considers links that belong to ALL specified groups

D.CSPF will signal the LSP without constraint checking

Explanation: The 'exclude-any' affinity constraint tells CSPF to exclude any link whose admin group bitmask has a match with the specified value. Setting 'exclude-any' to 'maintenance' prunes all links belonging to that group from the path computation, which is commonly used during planned maintenance windows.

3What is the purpose of Shared Risk Link Groups (SRLGs) in RSVP-TE traffic engineering?

A.To assign bandwidth pools to different LSP classes

B.To define groups of links that share a common physical risk such as a fiber conduit

C.To identify links that share the same IS-IS metric

D.To group LSPs that share the same administrative policy

Explanation: SRLGs identify sets of links that share a common physical resource such as a fiber duct or WDM span. When computing a backup path for FRR or a disjoint secondary LSP, CSPF can be instructed to avoid links in the same SRLG as the primary path, ensuring true path diversity even if physical fibers share a common conduit.

4In Junos, which RSVP-TE feature enables a router to pre-signal a secondary LSP so that failover occurs without waiting for re-signaling after a link failure?

A.Standby secondary LSP

B.Adaptive LSP

C.Priority preemption

D.Autobandwidth

Explanation: A standby secondary LSP is pre-established and kept ready in the forwarding table so that traffic can switch to it immediately upon primary LSP failure without waiting for a new RSVP signaling exchange. Without standby, a secondary LSP is only signaled after the primary fails, introducing convergence delay.

5What is LDP-IGP synchronization designed to prevent in a service provider network?

A.LDP label loops when two routers advertise the same FEC

B.Traffic black-holing when IGP converges faster than LDP label distribution

C.LDP session flaps due to high CPU utilization

D.Duplicate LDP hellos on LAN segments

Explanation: When a link recovers, the IGP can converge and start forwarding MPLS traffic over that link before LDP has finished distributing labels. Without synchronization, traffic is black-holed because there is no label on the newly elected path. LDP-IGP sync holds the IGP cost at infinity on the link until LDP is fully operational, preventing premature traffic steering.

6Which Junos configuration command enables LDP over an RSVP-TE LSP to extend LDP tunneling across a core where native LDP is not run?

A.set protocols ldp deaggregate

B.set protocols ldp traffic-engineering bgp-igp

C.set protocols mpls label-switched-path lsp-name ldp-tunneling

D.set protocols ldp track-igp-metric

Explanation: LDP over RSVP (LDP tunneling) allows LDP FECs to be resolved over RSVP-TE LSPs. In Junos the command 'ldp-tunneling' is configured under the specific LSP stanza. This creates a two-level label stack: the outer RSVP label steers traffic through the TE path, and the inner LDP label identifies the FEC at the egress.

7An MPLS FRR facility backup is configured on a Junos PLR. What does the PLR do when it detects a downstream link failure?

A.Signals a new primary LSP via CSPF before rerouting traffic

B.Immediately reroutes traffic onto the pre-established bypass LSP without re-signaling the primary

C.Sends a PathErr message and waits for the ingress to re-signal

D.Tears down the primary LSP and signals an alternate path from end to end

Explanation: In MPLS FRR facility backup, the Point of Local Repair (PLR) detects the failure and immediately forwards traffic on the pre-established bypass LSP. This local repair happens in milliseconds without waiting for the ingress to re-signal a new end-to-end path. The ingress is notified and may re-signal a new primary in parallel.

8Which MPLS OAM tool sends a UDP probe to the LSP FEC and is used to verify label forwarding on each hop of an MPLS path?

A.MPLS ping (LSP ping)

B.MPLS traceroute (LSP traceroute)

C.BFD for MPLS

D.RSVP patherr

Explanation: MPLS ping (RFC 4379) sends an MPLS-encapsulated UDP probe to the egress of an LSP. The egress validates that it is the correct endpoint for the FEC and responds to the sender. A single probe verifies end-to-end label forwarding. MPLS traceroute extends this by incrementing the MPLS TTL to identify each hop.

9In a Junos MPLS L3VPN, a PE router has two VRFs: VRF-A with RT export 65000:100 and VRF-B with RT import 65000:100 and 65000:200. A route leaked from VRF-A reaches VRF-B. What is the correct behavior?

A.The route is rejected because RT 65000:200 is not in VRF-A's export policy

B.The route is accepted into VRF-B because RT 65000:100 matches VRF-B's import policy

C.The route is rejected because VRFs on the same PE cannot exchange routes

D.The route is accepted only if a specific VRF import policy is configured

Explanation: When VRF-A exports a route with RT 65000:100 and VRF-B imports routes matching RT 65000:100, the route is accepted into VRF-B. This is the fundamental RT import/export mechanism that enables controlled VPN route leaking between VRFs. The match is purely based on the RT value in the BGP VPN-IPv4 UPDATE.

10Which internet access model for MPLS L3VPN places the default route in the VRF and uses a common service VRF to reach the internet?

A.Internet access via separate PE interface in global routing table

B.Internet access via route leaking with a shared internet VRF

C.Internet access via Carrier-of-Carriers overlay

D.Internet access via ASBR with Option C BGP next-hop propagation

Explanation: The common service VRF (sometimes called the internet VRF) model leaks a default route or specific internet prefixes from a shared VRF into customer VRFs. The PE imports these routes using RT matching. This avoids placing all internet routes in every VRF while still providing internet access to VPN customers.

About the JNCIP-SP Exam

JNCIP-SP validates professional-level knowledge of advanced Junos service provider technologies including MPLS traffic engineering (RSVP-TE with constraints, LDP, FRR), advanced L3VPN (Inter-AS Options A/B/C, Carrier-of-Carriers, internet access), L2VPN/VPLS/EVPN, Multicast VPN (Rosen mVPN, NG-MVPN, mLDP), Segment Routing (SR-MPLS, SR-TE, SRv6), deep IS-IS and OSPF, advanced BGP policy, and class of service.

Questions

65 scored questions

Time Limit

90 minutes

Passing Score

Pass/Fail

Exam Fee

$400 (Juniper Networks / Pearson VUE)

JNCIP-SP Exam Content Outline

25%

MPLS & Traffic Engineering

RSVP-TE with constraints (admin groups, SRLGs), LDP-IGP sync, LDP over RSVP, FRR link/node protection, autobandwidth, MPLS OAM

20%

L3VPN Advanced

Internet access options, common service VRF, Carrier-of-Carriers, Inter-AS Option A/B/C, BGP-LU

15%

L2VPN, VPLS & EVPN

BGP VPLS, LDP VPLS, pseudowires, VPLS multi-homing, EVPN introduction, route types

15%

Multicast VPN

Rosen mVPN (default MDT, data MDT), NG-MVPN (mLDP, MP-BGP MVPN, I-PMSI, S-PMSI)

15%

Segment Routing

SR-MPLS (Node SID, Adj-SID, SRGB, SR-TE, TI-LFA), SRv6 (SRH, locator, functions)

10%

IGP & BGP Policy

IS-IS deep (DIS, TE TLVs, OL bit, levels), OSPF deep (LSA types, TE), BGP communities, add-path, AS-path regex, CoS

How to Pass the JNCIP-SP Exam

What You Need to Know

Passing score: Pass/Fail
Exam length: 65 questions
Time limit: 90 minutes
Exam fee: $400

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

JNCIP-SP Study Tips from Top Performers

1Master RSVP-TE constraints: admin groups (include-all, include-any, exclude-any) and SRLG — know how CSPF uses these to prune links from path computation

2Understand LDP-IGP synchronization: why it exists (black-hole during link recovery), how it works (hold-down on IGP metric), and when to use it

3Study Inter-AS L3VPN options A, B, and C thoroughly — know the differences in what ASBRs carry (VRFs vs VPN-IPv4 routes vs labeled IPv4)

4Know Rosen mVPN Default MDT vs Data MDT: when Data MDT is triggered (bandwidth threshold), what changes when it is active

5For Segment Routing, understand Node SID vs Adj-SID, SRGB, and how TI-LFA uses SR label stacks to provide near-100% FRR coverage

Frequently Asked Questions

What is the JNCIP-SP exam format?

JNCIP-SP has 65 multiple-choice and multi-select questions in 90 minutes. The exam is pass/fail. It covers advanced SP topics including MPLS TE, L3VPN, VPLS, MVPN, Segment Routing, IS-IS, OSPF, BGP, and CoS. Delivered at Pearson VUE testing centers.

What is the prerequisite for JNCIP-SP?

JNCIS-SP (Juniper Networks Certified Specialist Service Provider) certification must be current before you can sit for the JNCIP-SP exam. Juniper also recommends 3-5 years of hands-on experience with Junos SP networking.

Which topics are most heavily tested on JNCIP-SP?

MPLS traffic engineering (RSVP-TE constraints, FRR, LDP) and L3VPN advanced topics (Inter-AS options, CsC, internet access) together account for about 45% of the exam. Segment Routing is increasingly important with SR-MPLS and SRv6 now part of the blueprint.

How does JNCIP-SP compare to Cisco CCNP Service Provider?

JNCIP-SP and Cisco CCNP SP cover similar SP networking domains (MPLS, L3VPN, segment routing, multicast). JNCIP-SP has deep emphasis on Junos-specific implementations, RSVP-TE constraints, and Rosen mVPN. CCNP SP covers more Cisco-specific technologies like IOS XR and Segment Routing with PCEP.