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Juniper JN0-364 Practice Test 60

Question 590

A Junos service-provider engineer is reviewing this operational case: A core BGP session stays established too long after a silent forwarding failure. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.

  1. Configure supported GRES and synchronized configuration behavior
  2. Configure supported GRES and nonstop bridging prerequisites
  3. Inspect which router is the DIS for the relevant level
  4. Configure supported BFD for the peer with safe negotiated intervals

Explanation

Correct Answer

D:

Configure supported BFD for the peer with safe negotiated intervals is the best implementation and troubleshooting step for this Junos service-provider case: A core BGP session stays established too long after a silent forwarding failure. Technical basis: BFD provides quick liveness detection and can signal clients such as BGP or OSPF, but timer negotiation and resource limits matter.

Incorrect Answers

A:

Configure supported GRES and synchronized configuration behavior is relevant to the different engineering topic "GRES Routing Engine failover", but it is not the most directly supported implementation and troubleshooting step for this precise case: A core BGP session stays established too long after a silent forwarding failure. the best answer here is: Configure supported BFD for the peer with safe negotiated intervals.

B:

That option concerns Nonstop bridging during RE switchover. BFD provides quick liveness detection and can signal clients such as BGP or OSPF, but timer negotiation and resource limits matter.

C:

Inspect which router is the DIS for the relevant level is relevant to the different engineering topic "IS-IS LAN DIS election", but it is not the most directly supported implementation and troubleshooting step for this precise case: A core BGP session stays established too long after a silent forwarding failure. the best answer here is: Configure supported BFD for the peer with safe negotiated intervals.

Question 591

A Junos service-provider engineer is reviewing this operational case: A core BGP session stays established too long after a silent forwarding failure. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. Forwarding continuity is maintained during controlled switchover
  2. The route client promptly reacts when BFD session Down is confirmed
  3. Eligible peers retain route continuity during the bounded restart
  4. Large packets traverse within the true transport MTU

Explanation

Correct Answer

B:

The route client promptly reacts when BFD session Down is confirmed is the best operational verification evidence for this Junos service-provider case: A core BGP session stays established too long after a silent forwarding failure. Technical basis: BFD provides quick liveness detection and can signal clients such as BGP or OSPF, but timer negotiation and resource limits matter.

Incorrect Answers

A:

Forwarding continuity is maintained during controlled switchover is relevant to the different engineering topic "GRES Routing Engine failover", but it is not the most directly supported operational verification evidence for this precise case: A core BGP session stays established too long after a silent forwarding failure. the best answer here is: The route client promptly reacts when BFD session Down is confirmed.

C:

Eligible peers retain route continuity during the bounded restart is relevant to the different engineering topic "Graceful restart helper coordination", but it is not the most directly supported operational verification evidence for this precise case: A core BGP session stays established too long after a silent forwarding failure. the best answer here is: The route client promptly reacts when BFD session Down is confirmed.

D:

That option concerns GRE MTU and encapsulation overhead. BFD provides quick liveness detection and can signal clients such as BGP or OSPF, but timer negotiation and resource limits matter.

Question 592

A provider network team identifies this situation: A BFD session flaps after timers are made excessively aggressive. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Validate security and protocol support before selecting GRE for a service-provider application
  2. Use BFD with a supported routing protocol to detect forwarding-path failures faster than its regular Hello timers
  3. Use graceful Routing Engine switchover where supported to preserve forwarding across a control-plane transition
  4. Use NSR for supported control-plane redundancy when preserving routing protocol state during RE switchover matters

Explanation

Correct Answer

B:

Use BFD with a supported routing protocol to detect forwarding-path failures faster than its regular Hello timers is the best technical design or decision for this Junos service-provider case: A BFD session flaps after timers are made excessively aggressive. Technical basis: BFD provides quick liveness detection and can signal clients such as BGP or OSPF, but timer negotiation and resource limits matter.

Incorrect Answers

A:

That option concerns GRE protocol and security limitations. BFD provides quick liveness detection and can signal clients such as BGP or OSPF, but timer negotiation and resource limits matter.

C:

Use graceful Routing Engine switchover where supported to preserve forwarding across a control-plane transition is relevant to the different engineering topic "GRES Routing Engine failover", but it is not the most directly supported technical design or decision for this precise case: A BFD session flaps after timers are made excessively aggressive. the best answer here is: Use BFD with a supported routing protocol to detect forwarding-path failures faster than its regular Hello timers.

D:

Use NSR for supported control-plane redundancy when preserving routing protocol state during RE switchover matters is relevant to the different engineering topic "Nonstop active routing NSR", but it is not the most directly supported technical design or decision for this precise case: A BFD session flaps after timers are made excessively aggressive. the best answer here is: Use BFD with a supported routing protocol to detect forwarding-path failures faster than its regular Hello timers.

Question 593

A provider network team identifies this situation: A BFD session flaps after timers are made excessively aggressive. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Review reverse underlay reachability and filter policy at both ends
  2. Check negotiated intervals, multiplier, CPU and transport characteristics
  3. Check LACP partner system/key state and aggregation configuration
  4. Check member state and configured minimum-links policy

Explanation

Correct Answer

B:

Check negotiated intervals, multiplier, CPU and transport characteristics is the best implementation and troubleshooting step for this Junos service-provider case: A BFD session flaps after timers are made excessively aggressive. Technical basis: BFD provides quick liveness detection and can signal clients such as BGP or OSPF, but timer negotiation and resource limits matter.

Incorrect Answers

A:

Review reverse underlay reachability and filter policy at both ends is relevant to the different engineering topic "GRE tunnel forwarding tests", but it is not the most directly supported implementation and troubleshooting step for this precise case: A BFD session flaps after timers are made excessively aggressive. the best answer here is: Check negotiated intervals, multiplier, CPU and transport characteristics.

C:

Check LACP partner system/key state and aggregation configuration is relevant to the different engineering topic "LAG and LACP negotiation", but it is not the most directly supported implementation and troubleshooting step for this precise case: A BFD session flaps after timers are made excessively aggressive. the best answer here is: Check negotiated intervals, multiplier, CPU and transport characteristics.

D:

That option concerns Aggregated-Ethernet minimum links. BFD provides quick liveness detection and can signal clients such as BGP or OSPF, but timer negotiation and resource limits matter.

Question 594

A provider network team identifies this situation: A BFD session flaps after timers are made excessively aggressive. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.

  1. Liveness detection is stable and the client responds to legitimate faults
  2. The pseudonode reflects the selected DIS after the topology stabilizes
  3. The intended member becomes collecting/distributing after correction
  4. The HA plan reflects available redundant control-plane hardware

Explanation

Correct Answer

A:

Liveness detection is stable and the client responds to legitimate faults is the best operational verification evidence for this Junos service-provider case: A BFD session flaps after timers are made excessively aggressive. Technical basis: BFD provides quick liveness detection and can signal clients such as BGP or OSPF, but timer negotiation and resource limits matter.

Incorrect Answers

B:

The pseudonode reflects the selected DIS after the topology stabilizes is relevant to the different engineering topic "IS-IS LAN DIS election", but it is not the most directly supported operational verification evidence for this precise case: A BFD session flaps after timers are made excessively aggressive. the best answer here is: Liveness detection is stable and the client responds to legitimate faults.

C:

The intended member becomes collecting/distributing after correction is relevant to the different engineering topic "LAG and LACP negotiation", but it is not the most directly supported operational verification evidence for this precise case: A BFD session flaps after timers are made excessively aggressive. the best answer here is: Liveness detection is stable and the client responds to legitimate faults.

D:

The HA plan reflects available redundant control-plane hardware is relevant to the different engineering topic "Nonstop active routing NSR", but it is not the most directly supported operational verification evidence for this precise case: A BFD session flaps after timers are made excessively aggressive. the best answer here is: Liveness detection is stable and the client responds to legitimate faults.

Question 595

A Junos service-provider engineer is reviewing this operational case: A customer management VLAN needs one default gateway address despite dual edge routers. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.

  1. Interpret type-one Router LSAs as router-local link information scoped to an OSPF area
  2. Use LACP and correct aggregated Ethernet membership to form a resilient Junos LAG
  3. Use VRRP priorities and tracking to provide a resilient virtual default gateway on an eligible segment
  4. Use BFD with a supported routing protocol to detect forwarding-path failures faster than its regular Hello timers

Explanation

Correct Answer

C:

Use VRRP priorities and tracking to provide a resilient virtual default gateway on an eligible segment is the best technical design or decision for this Junos service-provider case: A customer management VLAN needs one default gateway address despite dual edge routers. Technical basis: VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

Incorrect Answers

A:

That option concerns Router-LSA type-one interpretation. VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

B:

Use LACP and correct aggregated Ethernet membership to form a resilient Junos LAG is relevant to the different engineering topic "LAG and LACP negotiation", but it is not the most directly supported technical design or decision for this precise case: A customer management VLAN needs one default gateway address despite dual edge routers. the best answer here is: Use VRRP priorities and tracking to provide a resilient virtual default gateway on an eligible segment.

D:

Use BFD with a supported routing protocol to detect forwarding-path failures faster than its regular Hello timers is relevant to the different engineering topic "BFD rapid failure detection", but it is not the most directly supported technical design or decision for this precise case: A customer management VLAN needs one default gateway address despite dual edge routers. the best answer here is: Use VRRP priorities and tracking to provide a resilient virtual default gateway on an eligible segment.

Question 596

A Junos service-provider engineer is reviewing this operational case: A customer management VLAN needs one default gateway address despite dual edge routers. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.

  1. Inspect neighbor discovery and solicited neighbor state on the VLAN
  2. Configure the common VRRP virtual address and appropriate priorities
  3. Configure supported BFD for the peer with safe negotiated intervals
  4. Configure supported LACP modes and consistent ae membership

Explanation

Correct Answer

B:

Configure the common VRRP virtual address and appropriate priorities is the best implementation and troubleshooting step for this Junos service-provider case: A customer management VLAN needs one default gateway address despite dual edge routers. Technical basis: VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

Incorrect Answers

A:

That option concerns IPv6 neighbor discovery. VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

C:

Configure supported BFD for the peer with safe negotiated intervals is relevant to the different engineering topic "BFD rapid failure detection", but it is not the most directly supported implementation and troubleshooting step for this precise case: A customer management VLAN needs one default gateway address despite dual edge routers. the best answer here is: Configure the common VRRP virtual address and appropriate priorities.

D:

Configure supported LACP modes and consistent ae membership is relevant to the different engineering topic "LAG and LACP negotiation", but it is not the most directly supported implementation and troubleshooting step for this precise case: A customer management VLAN needs one default gateway address despite dual edge routers. the best answer here is: Configure the common VRRP virtual address and appropriate priorities.

Question 597

A Junos service-provider engineer is reviewing this operational case: A customer management VLAN needs one default gateway address despite dual edge routers. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. Hosts continue using the virtual gateway after the master fails
  2. The preferred route follows actual ordered policy rules
  3. The aggregate's operational state reflects the required active-member count
  4. The route client promptly reacts when BFD session Down is confirmed

Explanation

Correct Answer

A:

Hosts continue using the virtual gateway after the master fails is the best operational verification evidence for this Junos service-provider case: A customer management VLAN needs one default gateway address despite dual edge routers. Technical basis: VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

Incorrect Answers

B:

That option concerns BGP best-path selection order. VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

C:

The aggregate's operational state reflects the required active-member count is relevant to the different engineering topic "Aggregated-Ethernet minimum links", but it is not the most directly supported operational verification evidence for this precise case: A customer management VLAN needs one default gateway address despite dual edge routers. the best answer here is: Hosts continue using the virtual gateway after the master fails.

D:

The route client promptly reacts when BFD session Down is confirmed is relevant to the different engineering topic "BFD rapid failure detection", but it is not the most directly supported operational verification evidence for this precise case: A customer management VLAN needs one default gateway address despite dual edge routers. the best answer here is: Hosts continue using the virtual gateway after the master fails.

Question 598

A provider network team identifies this situation: The higher-priority VRRP router loses its upstream transport but remains master. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Use VRRP priorities and tracking to provide a resilient virtual default gateway on an eligible segment
  2. Verify that a valid label binding exists for the intended FEC before tracing a labeled path
  3. Use LACP and correct aggregated Ethernet membership to form a resilient Junos LAG
  4. Use protocol graceful restart only where neighbors support the necessary restart signaling and helper behavior

Explanation

Correct Answer

A:

Use VRRP priorities and tracking to provide a resilient virtual default gateway on an eligible segment is the best technical design or decision for this Junos service-provider case: The higher-priority VRRP router loses its upstream transport but remains master. Technical basis: VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

Incorrect Answers

B:

That option concerns MPLS label binding and retention. VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

C:

Use LACP and correct aggregated Ethernet membership to form a resilient Junos LAG is relevant to the different engineering topic "LAG and LACP negotiation", but it is not the most directly supported technical design or decision for this precise case: The higher-priority VRRP router loses its upstream transport but remains master. the best answer here is: Use VRRP priorities and tracking to provide a resilient virtual default gateway on an eligible segment.

D:

Use protocol graceful restart only where neighbors support the necessary restart signaling and helper behavior is relevant to the different engineering topic "Graceful restart helper coordination", but it is not the most directly supported technical design or decision for this precise case: The higher-priority VRRP router loses its upstream transport but remains master. the best answer here is: Use VRRP priorities and tracking to provide a resilient virtual default gateway on an eligible segment.

Question 599

A provider network team identifies this situation: The higher-priority VRRP router loses its upstream transport but remains master. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Verify actual chassis and feature support before enabling policy
  2. Use supported tracking or policy to adjust effective priority when upstream fails
  3. Review the LSDB for the advertisement before changing forwarding entries
  4. Check member state and configured minimum-links policy

Explanation

Correct Answer

B:

Use supported tracking or policy to adjust effective priority when upstream fails is the best implementation and troubleshooting step for this Junos service-provider case: The higher-priority VRRP router loses its upstream transport but remains master. Technical basis: VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

Incorrect Answers

A:

That option concerns Nonstop active routing NSR. VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

C:

That option concerns OSPF LSDB synchronization. VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

D:

Check member state and configured minimum-links policy is relevant to the different engineering topic "Aggregated-Ethernet minimum links", but it is not the most directly supported implementation and troubleshooting step for this precise case: The higher-priority VRRP router loses its upstream transport but remains master. the best answer here is: Use supported tracking or policy to adjust effective priority when upstream fails.

Question 600

A provider network team identifies this situation: The higher-priority VRRP router loses its upstream transport but remains master. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.

  1. The failure is attributed to unsupported or mismatched GR conditions
  2. The healthy backup becomes master and external reachability recovers
  3. The absence of contributors explains why the summary is inactive
  4. The control-plane handoff follows supported bridging continuity behavior

Explanation

Correct Answer

B:

The healthy backup becomes master and external reachability recovers is the best operational verification evidence for this Junos service-provider case: The higher-priority VRRP router loses its upstream transport but remains master. Technical basis: VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

Incorrect Answers

A:

The failure is attributed to unsupported or mismatched GR conditions is relevant to the different engineering topic "Graceful restart helper coordination", but it is not the most directly supported operational verification evidence for this precise case: The higher-priority VRRP router loses its upstream transport but remains master. the best answer here is: The healthy backup becomes master and external reachability recovers.

C:

That option concerns Aggregate-route contributor activation. VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

D:

That option concerns Nonstop bridging during RE switchover. VRRP elects an active virtual-router master and allows backup to take over under defined conditions.

Service Provider Routing and Switching, Specialist (JNCIS-SP) (JN0-364) Practice Tests