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Juniper JN0-364 Practice Test 59

Question 580

A provider network team identifies this situation: Routing peers drop reachability despite enabled graceful restart on one node. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Apply appropriate aggregated-Ethernet minimum-link conditions before declaring a degraded bundle operational
  2. Use protocol graceful restart only where neighbors support the necessary restart signaling and helper behavior
  3. Check BPDU exchange and control-plane filtering when spanning-tree connectivity is unstable
  4. Use LACP and correct aggregated Ethernet membership to form a resilient Junos LAG

Explanation

Correct Answer

B:

Use protocol graceful restart only where neighbors support the necessary restart signaling and helper behavior is the best technical design or decision for this Junos service-provider case: Routing peers drop reachability despite enabled graceful restart on one node. Technical basis: Graceful restart preserves routes temporarily during a control-plane restart using eligible cooperative peer behavior.

Incorrect Answers

A:

Apply appropriate aggregated-Ethernet minimum-link conditions before declaring a degraded bundle operational is relevant to the different engineering topic "Aggregated-Ethernet minimum links", but it is not the most directly supported technical design or decision for this precise case: Routing peers drop reachability despite enabled graceful restart on one node. the best answer here is: Use protocol graceful restart only where neighbors support the necessary restart signaling and helper behavior.

C:

That option concerns BPDU visibility on trunks. Graceful restart preserves routes temporarily during a control-plane restart using eligible cooperative peer behavior.

D:

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: Routing peers drop reachability despite enabled graceful restart on one node. the best answer here is: Use protocol graceful restart only where neighbors support the necessary restart signaling and helper behavior.

Question 581

A provider network team identifies this situation: Routing peers drop reachability despite enabled graceful restart on one node. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Check member state and configured minimum-links policy
  2. Compare wide metrics and circuit-level configuration
  3. Check negotiated intervals, multiplier, CPU and transport characteristics
  4. Inspect helper support, restart timers and protocol-specific state

Explanation

Correct Answer

D:

Inspect helper support, restart timers and protocol-specific state is the best implementation and troubleshooting step for this Junos service-provider case: Routing peers drop reachability despite enabled graceful restart on one node. Technical basis: Graceful restart preserves routes temporarily during a control-plane restart using eligible cooperative peer behavior.

Incorrect Answers

A:

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: Routing peers drop reachability despite enabled graceful restart on one node. the best answer here is: Inspect helper support, restart timers and protocol-specific state.

B:

Compare wide metrics and circuit-level configuration is relevant to the different engineering topic "IS-IS wide metrics", but it is not the most directly supported implementation and troubleshooting step for this precise case: Routing peers drop reachability despite enabled graceful restart on one node. the best answer here is: Inspect helper support, restart timers and protocol-specific state.

C:

Check negotiated intervals, multiplier, CPU and transport characteristics 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: Routing peers drop reachability despite enabled graceful restart on one node. the best answer here is: Inspect helper support, restart timers and protocol-specific state.

Question 582

A provider network team identifies this situation: Routing peers drop reachability despite enabled graceful restart on one node. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.

  1. Both engines have matching intended configuration state
  2. The failure is attributed to unsupported or mismatched GR conditions
  3. Outbound advertisement matches the intended prefix policy
  4. The service fails or continues only according to the approved threshold

Explanation

Correct Answer

B:

The failure is attributed to unsupported or mismatched GR conditions is the best operational verification evidence for this Junos service-provider case: Routing peers drop reachability despite enabled graceful restart on one node. Technical basis: Graceful restart preserves routes temporarily during a control-plane restart using eligible cooperative peer behavior.

Incorrect Answers

A:

Both engines have matching intended configuration state 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: Routing peers drop reachability despite enabled graceful restart on one node. the best answer here is: The failure is attributed to unsupported or mismatched GR conditions.

C:

That option concerns BGP route-troubleshooting CLI. Graceful restart preserves routes temporarily during a control-plane restart using eligible cooperative peer behavior.

D:

The service fails or continues only according to the approved threshold 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: Routing peers drop reachability despite enabled graceful restart on one node. the best answer here is: The failure is attributed to unsupported or mismatched GR conditions.

Question 583

A Junos service-provider engineer is reviewing this operational case: A provider bridging chassis should preserve VLAN forwarding over a planned RE switchover. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.

  1. Ensure MSTP region name, revision and VLAN-to-instance mapping agree across the intended switches
  2. Use LACP and correct aggregated Ethernet membership to form a resilient Junos LAG
  3. Apply appropriate aggregated-Ethernet minimum-link conditions before declaring a degraded bundle operational
  4. Use nonstop bridging with its platform-specific GRES dependency when L2 state continuity matters

Explanation

Correct Answer

D:

Use nonstop bridging with its platform-specific GRES dependency when L2 state continuity matters is the best technical design or decision for this Junos service-provider case: A provider bridging chassis should preserve VLAN forwarding over a planned RE switchover. Technical basis: Junos nonstop bridging preserves applicable Layer2 control state and requires related chassis redundancy configuration.

Incorrect Answers

A:

Ensure MSTP region name, revision and VLAN-to-instance mapping agree across the intended switches is relevant to the different engineering topic "MSTP region consistency", but it is not the most directly supported technical design or decision for this precise case: A provider bridging chassis should preserve VLAN forwarding over a planned RE switchover. the best answer here is: Use nonstop bridging with its platform-specific GRES dependency when L2 state continuity matters.

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 provider bridging chassis should preserve VLAN forwarding over a planned RE switchover. the best answer here is: Use nonstop bridging with its platform-specific GRES dependency when L2 state continuity matters.

C:

That option concerns Aggregated-Ethernet minimum links. Junos nonstop bridging preserves applicable Layer2 control state and requires related chassis redundancy configuration.

Question 584

A Junos service-provider engineer is reviewing this operational case: A provider bridging chassis should preserve VLAN forwarding over a planned RE switchover. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.

  1. Configure the common VRRP virtual address and appropriate priorities
  2. Configure supported BFD for the peer with safe negotiated intervals
  3. Configure supported GRES and nonstop bridging prerequisites
  4. Compare region name, revision and VLAN mapping

Explanation

Correct Answer

C:

Configure supported GRES and nonstop bridging prerequisites is the best implementation and troubleshooting step for this Junos service-provider case: A provider bridging chassis should preserve VLAN forwarding over a planned RE switchover. Technical basis: Junos nonstop bridging preserves applicable Layer2 control state and requires related chassis redundancy configuration.

Incorrect Answers

A:

Configure the common VRRP virtual address and appropriate priorities is relevant to the different engineering topic "VRRP virtual gateway failover", but it is not the most directly supported implementation and troubleshooting step for this precise case: A provider bridging chassis should preserve VLAN forwarding over a planned RE switchover. the best answer here is: Configure supported GRES and nonstop bridging prerequisites.

B:

That option concerns BFD rapid failure detection. Junos nonstop bridging preserves applicable Layer2 control state and requires related chassis redundancy configuration.

D:

Compare region name, revision and VLAN mapping is relevant to the different engineering topic "MSTP region consistency", but it is not the most directly supported implementation and troubleshooting step for this precise case: A provider bridging chassis should preserve VLAN forwarding over a planned RE switchover. the best answer here is: Configure supported GRES and nonstop bridging prerequisites.

Question 585

A Junos service-provider engineer is reviewing this operational case: A provider bridging chassis should preserve VLAN forwarding over a planned RE switchover. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. Relevant protocol state persists across a controlled failover
  2. The chosen active route and actual forwarding next hop can be reconciled
  3. Hosts continue using the virtual gateway after the master fails
  4. Layer2 forwarding and protocol state remain stable under approved failover

Explanation

Correct Answer

D:

Layer2 forwarding and protocol state remain stable under approved failover is the best operational verification evidence for this Junos service-provider case: A provider bridging chassis should preserve VLAN forwarding over a planned RE switchover. Technical basis: Junos nonstop bridging preserves applicable Layer2 control state and requires related chassis redundancy configuration.

Incorrect Answers

A:

Relevant protocol state persists across a controlled failover 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 provider bridging chassis should preserve VLAN forwarding over a planned RE switchover. the best answer here is: Layer2 forwarding and protocol state remain stable under approved failover.

B:

That option concerns Active-route versus hidden-route triage. Junos nonstop bridging preserves applicable Layer2 control state and requires related chassis redundancy configuration.

C:

Hosts continue using the virtual gateway after the master fails is relevant to the different engineering topic "VRRP virtual gateway failover", but it is not the most directly supported operational verification evidence for this precise case: A provider bridging chassis should preserve VLAN forwarding over a planned RE switchover. the best answer here is: Layer2 forwarding and protocol state remain stable under approved failover.

Question 586

A provider network team identifies this situation: A redundancy drill shows spanning-tree churn even though NSB was requested. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Use protocol graceful restart only where neighbors support the necessary restart signaling and helper behavior
  2. Use nonstop bridging with its platform-specific GRES dependency when L2 state continuity matters
  3. Match IS-IS authentication configuration on participating interfaces and levels
  4. Use graceful Routing Engine switchover where supported to preserve forwarding across a control-plane transition

Explanation

Correct Answer

B:

Use nonstop bridging with its platform-specific GRES dependency when L2 state continuity matters is the best technical design or decision for this Junos service-provider case: A redundancy drill shows spanning-tree churn even though NSB was requested. Technical basis: Junos nonstop bridging preserves applicable Layer2 control state and requires related chassis redundancy configuration.

Incorrect Answers

A:

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: A redundancy drill shows spanning-tree churn even though NSB was requested. the best answer here is: Use nonstop bridging with its platform-specific GRES dependency when L2 state continuity matters.

C:

That option concerns IS-IS authentication checks. Junos nonstop bridging preserves applicable Layer2 control state and requires related chassis redundancy configuration.

D:

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 redundancy drill shows spanning-tree churn even though NSB was requested. the best answer here is: Use nonstop bridging with its platform-specific GRES dependency when L2 state continuity matters.

Question 587

A provider network team identifies this situation: A redundancy drill shows spanning-tree churn even though NSB was requested. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Inspect helper support, restart timers and protocol-specific state
  2. Verify actual chassis and feature support before enabling policy
  3. Review NSB operational enablement, configuration sync and platform capability
  4. Confirm that SR segment routing need not rely on RSVP per-LSP signaling

Explanation

Correct Answer

C:

Review NSB operational enablement, configuration sync and platform capability is the best implementation and troubleshooting step for this Junos service-provider case: A redundancy drill shows spanning-tree churn even though NSB was requested. Technical basis: Junos nonstop bridging preserves applicable Layer2 control state and requires related chassis redundancy configuration.

Incorrect Answers

A:

Inspect helper support, restart timers and protocol-specific state is relevant to the different engineering topic "Graceful restart helper coordination", but it is not the most directly supported implementation and troubleshooting step for this precise case: A redundancy drill shows spanning-tree churn even though NSB was requested. the best answer here is: Review NSB operational enablement, configuration sync and platform capability.

B:

Verify actual chassis and feature support before enabling policy is relevant to the different engineering topic "Nonstop active routing NSR", but it is not the most directly supported implementation and troubleshooting step for this precise case: A redundancy drill shows spanning-tree churn even though NSB was requested. the best answer here is: Review NSB operational enablement, configuration sync and platform capability.

D:

That option concerns SR-MPLS shortest-path transport. Junos nonstop bridging preserves applicable Layer2 control state and requires related chassis redundancy configuration.

Question 588

A provider network team identifies this situation: A redundancy drill shows spanning-tree churn even though NSB was requested. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.

  1. Both engines have matching intended configuration state
  2. The intended member becomes collecting/distributing after correction
  3. The pseudonode reflects the selected DIS after the topology stabilizes
  4. The control-plane handoff follows supported bridging continuity behavior

Explanation

Correct Answer

D:

The control-plane handoff follows supported bridging continuity behavior is the best operational verification evidence for this Junos service-provider case: A redundancy drill shows spanning-tree churn even though NSB was requested. Technical basis: Junos nonstop bridging preserves applicable Layer2 control state and requires related chassis redundancy configuration.

Incorrect Answers

A:

Both engines have matching intended configuration state 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 redundancy drill shows spanning-tree churn even though NSB was requested. the best answer here is: The control-plane handoff follows supported bridging continuity behavior.

B:

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 redundancy drill shows spanning-tree churn even though NSB was requested. the best answer here is: The control-plane handoff follows supported bridging continuity behavior.

C:

That option concerns IS-IS LAN DIS election. Junos nonstop bridging preserves applicable Layer2 control state and requires related chassis redundancy configuration.

Question 589

A Junos service-provider engineer is reviewing this operational case: A core BGP session stays established too long after a silent forwarding failure. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.

  1. Test both overlay reachability and underlay encapsulated packet delivery during troubleshooting
  2. Use protocol graceful restart only where neighbors support the necessary restart signaling and helper behavior
  3. Use BFD with a supported routing protocol to detect forwarding-path failures faster than its regular Hello timers
  4. Use VRRP priorities and tracking to provide a resilient virtual default gateway on an eligible segment

Explanation

Correct Answer

C:

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 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:

Test both overlay reachability and underlay encapsulated packet delivery during troubleshooting is relevant to the different engineering topic "GRE tunnel forwarding tests", but it is not the most directly supported technical design or decision for this precise case: A core BGP session stays established too long after a silent forwarding failure. the best answer here is: Use BFD with a supported routing protocol to detect forwarding-path failures faster than its regular Hello timers.

B:

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: A core BGP session stays established too long after a silent forwarding failure. the best answer here is: Use BFD with a supported routing protocol to detect forwarding-path failures faster than its regular Hello timers.

D:

That option concerns VRRP virtual gateway failover. BFD provides quick liveness detection and can signal clients such as BGP or OSPF, but timer negotiation and resource limits matter.

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.

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