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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: A standby Routing Engine does not have synchronized configuration after a change. the best answer here is: Both engines have matching intended configuration state.

That option concerns VRRP virtual gateway failover. GRES synchronizes key forwarding and interface state between Routing Engines to reduce traffic interruption.

That option concerns BGP inbound routing policy. GRES synchronizes key forwarding and interface state between Routing Engines to reduce traffic interruption.

Use VRRP priorities and tracking to provide a resilient virtual default gateway on an eligible segment is relevant to the different engineering topic "VRRP virtual gateway failover", but it is not the most directly supported technical design or decision for this precise case: A service-provider core must avoid broad BGP and OSPF session disruption during an RE failover. the best answer here is: Use NSR for supported control-plane redundancy when preserving routing protocol state during RE switchover matters.

That option concerns STP root bridge placement. NSR runs routing protocol state on the backup RE and typically builds on GRES infrastructure.

That option concerns Nonstop bridging during RE switchover. NSR runs routing protocol state on the backup RE and typically builds on GRES infrastructure.

That option concerns LAG and LACP negotiation. NSR runs routing protocol state on the backup RE and typically builds on GRES infrastructure.

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 service-provider core must avoid broad BGP and OSPF session disruption during an RE failover. the best answer here is: Enable supported NSR with required HA prerequisites.

That option concerns BGP route-troubleshooting CLI. NSR runs routing protocol state on the backup RE and typically builds on GRES infrastructure.

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 service-provider core must avoid broad BGP and OSPF session disruption during an RE failover. the best answer here is: Relevant protocol state persists across a controlled failover.

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 service-provider core must avoid broad BGP and OSPF session disruption during an RE failover. the best answer here is: Relevant protocol state persists across a controlled failover.

That option concerns MAC-address dynamic learning. NSR runs routing protocol state on the backup RE and typically builds on GRES infrastructure.

Use VRRP priorities and tracking to provide a resilient virtual default gateway on an eligible segment is relevant to the different engineering topic "VRRP virtual gateway failover", but it is not the most directly supported technical design or decision for this precise case: An operator expects NSR on a single-RE device without a backup routing engine. the best answer here is: Use NSR for supported control-plane redundancy when preserving routing protocol state during RE switchover matters.

That option concerns Aggregated-Ethernet minimum links. NSR runs routing protocol state on the backup RE and typically builds on GRES infrastructure.

That option concerns OSPF router-ID uniqueness. NSR runs routing protocol state on the backup RE and typically builds on GRES infrastructure.

That option concerns BGP best-path selection order. NSR runs routing protocol state on the backup RE and typically builds on GRES infrastructure.

Use supported tracking or policy to adjust effective priority when upstream fails 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: An operator expects NSR on a single-RE device without a backup routing engine. the best answer here is: Verify actual chassis and feature support before enabling policy.

Inspect GRES synchronization and commit synchronization settings 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: An operator expects NSR on a single-RE device without a backup routing engine. the best answer here is: Verify actual chassis and feature support before enabling policy.

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: An operator expects NSR on a single-RE device without a backup routing engine. the best answer here is: The HA plan reflects available redundant control-plane hardware.

That option concerns LDP-IGP synchronization. NSR runs routing protocol state on the backup RE and typically builds on GRES infrastructure.

That option concerns Graceful restart helper coordination. NSR runs routing protocol state on the backup RE and typically builds on GRES infrastructure.

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 core node restarts its routing process while neighbors support the approved GR mechanism. the best answer here is: Use protocol graceful restart only where neighbors support the necessary restart signaling and helper behavior.

That option concerns OSPF hello/dead agreement. Graceful restart preserves routes temporarily during a control-plane restart using eligible cooperative peer behavior.

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 core node restarts its routing process while neighbors support the approved GR mechanism. the best answer here is: Use protocol graceful restart only where neighbors support the necessary restart signaling and helper behavior.

Adjust approved IS-IS interface metrics for the correct level 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: A core node restarts its routing process while neighbors support the approved GR mechanism. the best answer here is: Configure and verify supported graceful restart and helper capabilities.

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 node restarts its routing process while neighbors support the approved GR mechanism. the best answer here is: Configure and verify supported graceful restart and helper capabilities.

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 core node restarts its routing process while neighbors support the approved GR mechanism. the best answer here is: Configure and verify supported graceful restart and helper capabilities.

That option concerns RIB-group route sharing. Graceful restart preserves routes temporarily during a control-plane restart using eligible cooperative peer behavior.

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 core node restarts its routing process while neighbors support the approved GR mechanism. the best answer here is: Eligible peers retain route continuity during the bounded restart.

That option concerns Nonstop bridging during RE switchover. Graceful restart preserves routes temporarily during a control-plane restart using eligible cooperative peer behavior.

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.

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

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.