Juniper JN0-364 Practice Test 46
Question 450
A provider network team identifies this situation: A traffic-engineered LSP repeatedly tears down at one transit router. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.
- The active table contains a resolvable path for authorized prefixes
- The LSP stabilizes after the relevant signaling restriction is corrected
- The signaling result identifies the unsatisfied explicit constraint
- The path is validated by IGP SID and label forwarding state
Explanation
Correct Answer
B:The LSP stabilizes after the relevant signaling restriction is corrected is the best operational verification evidence for this Junos service-provider case: A traffic-engineered LSP repeatedly tears down at one transit router. Technical basis: RSVP sessions must successfully signal along a path before the intended signaled MPLS LSP can forward.
Incorrect Answers
A:That option concerns BGP next-hop reachability. RSVP sessions must successfully signal along a path before the intended signaled MPLS LSP can forward.
C:That option concerns RSVP explicit-route constraints, not the requirement in this case.
D:That option concerns SR-MPLS shortest-path transport. RSVP sessions must successfully signal along a path before the intended signaled MPLS LSP can forward.
Question 451
A Junos service-provider engineer is reviewing this operational case: A provider deploys SR-MPLS for selected backbone loopbacks. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.
- Differentiate RSVP signaling state failure from underlying IGP reachability
- Use BGP groups to share policy and common parameters while retaining correct peer-specific settings
- Relate a Segment Routing prefix SID to an IGP-advertised prefix and the router's supported label behavior
- Interpret MPLS shim-label fields including label value, traffic class, bottom-of-stack and TTL
Explanation
Correct Answer
C:Relate a Segment Routing prefix SID to an IGP-advertised prefix and the router's supported label behavior is the best technical design or decision for this Junos service-provider case: A provider deploys SR-MPLS for selected backbone loopbacks. Technical basis: SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
Incorrect Answers
A:Differentiate RSVP signaling state failure from underlying IGP reachability is relevant to the different engineering topic "RSVP session and state troubleshooting", but it is not the most directly supported technical design or decision for this precise case: A provider deploys SR-MPLS for selected backbone loopbacks. the best answer here is: Relate a Segment Routing prefix SID to an IGP-advertised prefix and the router's supported label behavior.
B:That option concerns BGP peer-group policy inheritance. SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
D:That option concerns MPLS label-stack header. SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
Question 452
A Junos service-provider engineer is reviewing this operational case: A provider deploys SR-MPLS for selected backbone loopbacks. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.
- Review hello counters, interface levels, NET area and authentication
- Configure and verify the supported prefix SID advertisements in the IGP
- Inspect show rsvp session and RSVP signaling error detail
- Inspect how the ingress imposes the outgoing label stack
Explanation
Correct Answer
B:Configure and verify the supported prefix SID advertisements in the IGP is the best implementation and troubleshooting step for this Junos service-provider case: A provider deploys SR-MPLS for selected backbone loopbacks. Technical basis: SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
Incorrect Answers
A:That option concerns IS-IS hello adjacency negotiation. SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
C:Inspect show rsvp session and RSVP signaling error detail is relevant to the different engineering topic "RSVP session and state troubleshooting", but it is not the most directly supported implementation and troubleshooting step for this precise case: A provider deploys SR-MPLS for selected backbone loopbacks. the best answer here is: Configure and verify the supported prefix SID advertisements in the IGP.
D:Inspect how the ingress imposes the outgoing label stack is relevant to the different engineering topic "MPLS push swap pop forwarding", but it is not the most directly supported implementation and troubleshooting step for this precise case: A provider deploys SR-MPLS for selected backbone loopbacks. the best answer here is: Configure and verify the supported prefix SID advertisements in the IGP.
Question 453
A Junos service-provider engineer is reviewing this operational case: A provider deploys SR-MPLS for selected backbone loopbacks. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.
- The penultimate hop pops the transport label as expected
- The intended prefix segments appear in the forwarding state
- Packets enter the LSP associated with their intended egress
- The session is Established and intended NLRI appears in UPDATEs
Explanation
Correct Answer
B:The intended prefix segments appear in the forwarding state is the best operational verification evidence for this Junos service-provider case: A provider deploys SR-MPLS for selected backbone loopbacks. Technical basis: SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
Incorrect Answers
A:That option concerns Penultimate-hop popping. SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
C:Packets enter the LSP associated with their intended egress is relevant to the different engineering topic "MPLS forwarding-equivalence classes", but it is not the most directly supported operational verification evidence for this precise case: A provider deploys SR-MPLS for selected backbone loopbacks. the best answer here is: The intended prefix segments appear in the forwarding state.
D:That option concerns BGP message processing. SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
Question 454
A provider network team identifies this situation: A transit router shows unexpected labels for a remote prefix SID. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.
- Identify the forwarding equivalence class used to map network traffic to label-switched paths
- Use VSTP only when per-VLAN spanning-tree operation is actually desired and supported
- Relate a Segment Routing prefix SID to an IGP-advertised prefix and the router's supported label behavior
- Recognize ingress push, transit swap and egress pop actions along a label-switched path
Explanation
Correct Answer
C:Relate a Segment Routing prefix SID to an IGP-advertised prefix and the router's supported label behavior is the best technical design or decision for this Junos service-provider case: A transit router shows unexpected labels for a remote prefix SID. Technical basis: SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
Incorrect Answers
A:Identify the forwarding equivalence class used to map network traffic to label-switched paths is relevant to the different engineering topic "MPLS forwarding-equivalence classes", but it is not the most directly supported technical design or decision for this precise case: A transit router shows unexpected labels for a remote prefix SID. the best answer here is: Relate a Segment Routing prefix SID to an IGP-advertised prefix and the router's supported label behavior.
B:That option concerns VSTP per-VLAN tree behavior. SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
D:Recognize ingress push, transit swap and egress pop actions along a label-switched path is relevant to the different engineering topic "MPLS push swap pop forwarding", but it is not the most directly supported technical design or decision for this precise case: A transit router shows unexpected labels for a remote prefix SID. the best answer here is: Relate a Segment Routing prefix SID to an IGP-advertised prefix and the router's supported label behavior.
Question 455
A provider network team identifies this situation: A transit router shows unexpected labels for a remote prefix SID. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.
- Review local SRGB interpretation and IGP SID advertisements
- Check the transport addresses and route to the neighbor's LDP identifier
- Compare native VLAN configuration on each side
- Inspect RSVP session status and per-hop signaling errors
Explanation
Correct Answer
A:Review local SRGB interpretation and IGP SID advertisements is the best implementation and troubleshooting step for this Junos service-provider case: A transit router shows unexpected labels for a remote prefix SID. Technical basis: SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
Incorrect Answers
B:Check the transport addresses and route to the neighbor's LDP identifier is relevant to the different engineering topic "LDP session discovery", but it is not the most directly supported implementation and troubleshooting step for this precise case: A transit router shows unexpected labels for a remote prefix SID. the best answer here is: Review local SRGB interpretation and IGP SID advertisements.
C:That option concerns Native VLAN and untagged trunk behavior. SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
D:Inspect RSVP session status and per-hop signaling errors is relevant to the different engineering topic "RSVP LSP signaling", but it is not the most directly supported implementation and troubleshooting step for this precise case: A transit router shows unexpected labels for a remote prefix SID. the best answer here is: Review local SRGB interpretation and IGP SID advertisements.
Question 456
A provider network team identifies this situation: A transit router shows unexpected labels for a remote prefix SID. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.
- LDP sessions stabilize once their transport endpoints resolve
- Bidirectional overlay packets are forwarded correctly
- The forwarding label is consistent with the resolved segment rather than a guessed number
- The diagnosed signaling fault is corrected without changing unrelated customer routing
Explanation
Correct Answer
C:The forwarding label is consistent with the resolved segment rather than a guessed number is the best operational verification evidence for this Junos service-provider case: A transit router shows unexpected labels for a remote prefix SID. Technical basis: SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
Incorrect Answers
A:LDP sessions stabilize once their transport endpoints resolve is relevant to the different engineering topic "LDP session discovery", but it is not the most directly supported operational verification evidence for this precise case: A transit router shows unexpected labels for a remote prefix SID. the best answer here is: The forwarding label is consistent with the resolved segment rather than a guessed number.
B:That option concerns GRE tunnel forwarding tests. SR-MPLS uses IGP-distributed segment identifiers and a label stack, reducing dependence on per-LSP RSVP signaling.
D:The diagnosed signaling fault is corrected without changing unrelated customer routing is relevant to the different engineering topic "RSVP LSP signaling", but it is not the most directly supported operational verification evidence for this precise case: A transit router shows unexpected labels for a remote prefix SID. the best answer here is: The forwarding label is consistent with the resolved segment rather than a guessed number.
Question 457
A Junos service-provider engineer is reviewing this operational case: An SR-capable core rebalances an LSP after a metric update. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.
- Relate a Segment Routing prefix SID to an IGP-advertised prefix and the router's supported label behavior
- Filter and modify received BGP routes with explicit import policy terms
- Use IGP SPF results and segment labels to validate shortest-path SR-MPLS forwarding
- Recognize ingress push, transit swap and egress pop actions along a label-switched path
Explanation
Correct Answer
C:Use IGP SPF results and segment labels to validate shortest-path SR-MPLS forwarding is the best technical design or decision for this Junos service-provider case: An SR-capable core rebalances an LSP after a metric update. Technical basis: A prefix segment generally follows IGP shortest-path computation, unlike an arbitrary unconstrained manual route.
Incorrect Answers
A:That option concerns Segment-routing MPLS prefix SIDs. A prefix segment generally follows IGP shortest-path computation, unlike an arbitrary unconstrained manual route.
B:Filter and modify received BGP routes with explicit import policy terms is relevant to the different engineering topic "BGP inbound routing policy", but it is not the most directly supported technical design or decision for this precise case: An SR-capable core rebalances an LSP after a metric update. the best answer here is: Use IGP SPF results and segment labels to validate shortest-path SR-MPLS forwarding.
D:Recognize ingress push, transit swap and egress pop actions along a label-switched path is relevant to the different engineering topic "MPLS push swap pop forwarding", but it is not the most directly supported technical design or decision for this precise case: An SR-capable core rebalances an LSP after a metric update. the best answer here is: Use IGP SPF results and segment labels to validate shortest-path SR-MPLS forwarding.
Question 458
A Junos service-provider engineer is reviewing this operational case: An SR-capable core rebalances an LSP after a metric update. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.
- Configure the common VRRP virtual address and appropriate priorities
- Enable or verify supported LDP-IGP synchronization behavior
- Inspect IGP cost change and installed SR forwarding route
- Enable suitable MPLS/RSVP interfaces and define the ingress LSP destination
Explanation
Correct Answer
C:Inspect IGP cost change and installed SR forwarding route is the best implementation and troubleshooting step for this Junos service-provider case: An SR-capable core rebalances an LSP after a metric update. Technical basis: A prefix segment generally follows IGP shortest-path computation, unlike an arbitrary unconstrained manual route.
Incorrect Answers
A:That option concerns VRRP virtual gateway failover. A prefix segment generally follows IGP shortest-path computation, unlike an arbitrary unconstrained manual route.
B:That option concerns LDP-IGP synchronization. A prefix segment generally follows IGP shortest-path computation, unlike an arbitrary unconstrained manual route.
D:Enable suitable MPLS/RSVP interfaces and define the ingress LSP destination is relevant to the different engineering topic "RSVP LSP signaling", but it is not the most directly supported implementation and troubleshooting step for this precise case: An SR-capable core rebalances an LSP after a metric update. the best answer here is: Inspect IGP cost change and installed SR forwarding route.
Question 459
A Junos service-provider engineer is reviewing this operational case: An SR-capable core rebalances an LSP after a metric update. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.
- The first core hop sees the expected MPLS label
- Labeled traffic follows the recomputed eligible shortest path
- An RSVP session and operational MPLS LSP become visible
- The peers advance to Full and have consistent eligible LSDB entries
Explanation
Correct Answer
B:Labeled traffic follows the recomputed eligible shortest path is the best operational verification evidence for this Junos service-provider case: An SR-capable core rebalances an LSP after a metric update. Technical basis: A prefix segment generally follows IGP shortest-path computation, unlike an arbitrary unconstrained manual route.
Incorrect Answers
A:The first core hop sees the expected MPLS label is relevant to the different engineering topic "MPLS push swap pop forwarding", but it is not the most directly supported operational verification evidence for this precise case: An SR-capable core rebalances an LSP after a metric update. the best answer here is: Labeled traffic follows the recomputed eligible shortest path.
C:An RSVP session and operational MPLS LSP become visible is relevant to the different engineering topic "RSVP LSP signaling", but it is not the most directly supported operational verification evidence for this precise case: An SR-capable core rebalances an LSP after a metric update. the best answer here is: Labeled traffic follows the recomputed eligible shortest path.
D:That option concerns OSPF LSDB synchronization. A prefix segment generally follows IGP shortest-path computation, unlike an arbitrary unconstrained manual route.
Question 460
A provider network team identifies this situation: An operator sees a working SR prefix SID but no RSVP session. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.
- Distinguish transport routes, MPLS forwarding entries and regular IP routing when troubleshooting
- Interpret OPEN, UPDATE, KEEPALIVE and NOTIFICATION roles during session setup and operation
- Recognize ingress push, transit swap and egress pop actions along a label-switched path
- Use IGP SPF results and segment labels to validate shortest-path SR-MPLS forwarding
Explanation
Correct Answer
D:Use IGP SPF results and segment labels to validate shortest-path SR-MPLS forwarding is the best technical design or decision for this Junos service-provider case: An operator sees a working SR prefix SID but no RSVP session. Technical basis: A prefix segment generally follows IGP shortest-path computation, unlike an arbitrary unconstrained manual route.
Incorrect Answers
A:Distinguish transport routes, MPLS forwarding entries and regular IP routing when troubleshooting is relevant to the different engineering topic "MPLS route and forwarding tables", but it is not the most directly supported technical design or decision for this precise case: An operator sees a working SR prefix SID but no RSVP session. the best answer here is: Use IGP SPF results and segment labels to validate shortest-path SR-MPLS forwarding.
B:That option concerns BGP message processing. A prefix segment generally follows IGP shortest-path computation, unlike an arbitrary unconstrained manual route.
C:Recognize ingress push, transit swap and egress pop actions along a label-switched path is relevant to the different engineering topic "MPLS push swap pop forwarding", but it is not the most directly supported technical design or decision for this precise case: An operator sees a working SR prefix SID but no RSVP session. the best answer here is: Use IGP SPF results and segment labels to validate shortest-path SR-MPLS forwarding.