Juniper JN0-364 Questions & Answers

The proposal changes RSVP PATH and RESV signaling; that is not the failure isolated by the facts. It could leave MPLS label push swap pop unresolved even if its own test passed. MPLS forwards using labels: ingress commonly pushes labels, intermediate LSRs swap them, and the egress removes the remaining label.

The proposal changes penultimate hop popping; that is not the failure isolated by the facts. It could leave MPLS label push swap pop unresolved even if its own test passed. MPLS forwards using labels: ingress commonly pushes labels, intermediate LSRs swap them, and the egress removes the remaining label.

The proposal changes IS-IS wide metrics; that is not the failure isolated by the facts. It could leave MPLS label push swap pop unresolved even if its own test passed. MPLS forwards using labels: ingress commonly pushes labels, intermediate LSRs swap them, and the egress removes the remaining label.

AS-path prepending can make a path less attractive to other ASes but does not override their local policies or guarantee inbound steering. That describes AS-path prepend inbound influence, whereas the observed symptoms are caused by IS-IS LSP database synchronization; it does not predict the reported behavior.

This principle matters when troubleshooting IS-IS route redistribution policy, but using it here mistakes a different failure mode for IS-IS LSP database synchronization. The relevant distinction is: IS-IS LSP sequencing and sequence-number PDUs keep link-state databases synchronized; adjacency status alone does not ensure database parity.

Although IS-IS TLV reachability needs this consideration, the failure at issue has a different cause. IS-IS LSP sequencing and sequence-number PDUs keep link-state databases synchronized; adjacency status alone does not ensure database parity.

The alternate port assumes an appropriate forwarding role on failure without allowing simultaneous Layer 2 loops. That establishes RSTP alternate port reconvergence rather than a repaired RSTP edge BPDU protection path. The reported failure still requires this evidence: an unexpected BPDU causes the intended protective state and operations receive a traceable port event.

The two peers progress through database synchronization to Full and agree on reachable link-state information. That establishes OSPF MTU negotiation rather than a repaired RSTP edge BPDU protection path. The reported failure still requires this evidence: an unexpected BPDU causes the intended protective state and operations receive a traceable port event.

This measurement tests MSTP region consistency; it cannot distinguish success from failure for the observed RSTP edge BPDU protection condition. Edge BPDU protection is intended for ports expected to connect to hosts, not for ordinary switch-to-switch links that exchange BPDUs.

Align prefix-SID advertisements and SRGB interpretation on the participating routers and verify labels assigned for the FEC. That could help in a case involving segment routing prefix SID. This failure instead depends on RSTP root protection; root protection blocks acceptance of an unexpected superior root across designated boundary ports; it is not the same as BPDU edge protection.

Enable the supported BPDU protection behavior on designated edge ports so unexpected BPDUs trigger a controlled protective response. That could help in a case involving RSTP edge BPDU protection. This failure instead depends on RSTP root protection; root protection blocks acceptance of an unexpected superior root across designated boundary ports; it is not the same as BPDU edge protection.

Use loop protection on appropriate nondesignated interfaces and verify the safe state during missing-BPDU events. That could help in a case involving RSTP loop protection. This failure instead depends on RSTP root protection; root protection blocks acceptance of an unexpected superior root across designated boundary ports; it is not the same as BPDU edge protection.

OSPF external redistribution is controlled by export policy; stable IGP neighbor state does not imply arbitrary static or direct routes are advertised. That describes OSPF external route export, whereas the observed symptoms are caused by OSPF MTU negotiation; it does not predict the reported behavior.

This principle matters when troubleshooting NSR protocol state replication, but using it here mistakes a different failure mode for OSPF MTU negotiation. The relevant distinction is: OSPF database description negotiation can reject incompatible interface MTUs even after hello packets establish initial communication.

OSPF neighbor formation requires compatible hello and dead timers; link-layer carrier does not override timer mismatch. Those conditions do not account for the specific OSPF MTU negotiation problem reported by Ridgefield Carrier.

The control protects segment routing adjacency SID. It does not establish the ongoing RSVP path bandwidth admission behavior required in this network. RSVP traffic engineering applies resource reservation and constrained path selection, not merely IP shortest-path routing.

The control protects MPLS label push swap pop. It does not establish the ongoing RSVP path bandwidth admission behavior required in this network. RSVP traffic engineering applies resource reservation and constrained path selection, not merely IP shortest-path routing.

Compare OSPF area IDs at both ends of every new inter-router link before production cutover. That ongoing check is for OSPF area identity mismatch; it would not reliably detect recurrence of RSVP path bandwidth admission. RSVP traffic engineering applies resource reservation and constrained path selection, not merely IP shortest-path routing.

This measurement tests equal-cost forwarding flow hashing; it cannot distinguish success from failure for the observed generated route qualified next hop condition. Generated routes can derive their next-hop behavior from qualifying contributing routes, unlike aggregate discard summaries.

This measurement tests stable OSPF router identifier; it cannot distinguish success from failure for the observed generated route qualified next hop condition. Generated routes can derive their next-hop behavior from qualifying contributing routes, unlike aggregate discard summaries. Applied here, the relevant facts are: A regional gateway needs a summary that inherits forwarding from an eligible contributing route, but an aggregate discard route is used instead. The question asks which observation would most directly establish that the reported failure has been repaired.

The affected customer's lookup uses the intended instance RIB and reaches only the destinations deliberately made available to that instance. That establishes routing instance separation rather than a repaired generated route qualified next hop path. The reported failure still requires this evidence: the generated route becomes active when eligible contributors exist and forwards through the intended resolved contributing next hop.

Set and verify the suitable point-to-point OSPF network type on both intended endpoints. This addresses OSPF point-to-point topology, but the reported symptoms arise from OSPF area identity mismatch. For this case, verify instead that the pair establishes the expected OSPF adjacency with matching area assignment and reachable learned prefixes. Applied here, the relevant facts are: A provider ring replacement uses area zero on one endpoint and a nonbackbone area on the other, leaving the pair absent from the neighbor table. The question asks which focused engineering action would best correct the fault.

Inspect the IS-IS link-state database and CSNP/PSNP exchange to resolve synchronization or flooding problems. That could help in a case involving IS-IS LSP database synchronization. This failure instead depends on OSPF area identity mismatch; OSPF area identity is part of neighbor compatibility, and mismatched area membership prevents formation of the intended adjacency.

The proposal changes OSPF designated router election; that is not the failure isolated by the facts. It could leave OSPF area identity mismatch unresolved even if its own test passed. OSPF area identity is part of neighbor compatibility, and mismatched area membership prevents formation of the intended adjacency.

The proposal changes IS-IS L1 and L2 reachability; that is not the failure isolated by the facts. It could leave routing instance separation unresolved even if its own test passed. Routing instances maintain separate routing and forwarding contexts; entries in one RIB do not automatically appear in another.

Correct the static route's reachable next hop and preference, then verify that its active route resolves to an operational forwarding interface. Its normal acceptance signal would be the intended destination appears as an active route with a resolvable next hop in the routing table and forwarding table. Here the deciding check is different: the affected customer's lookup uses the intended instance RIB and reaches only the destinations deliberately made available to that instance.

Validate eligible equal-cost next hops and the configured forwarding-table export load-balancing behavior, measuring distribution across multiple flows. Its normal acceptance signal would be the forwarding table contains the intended next-hop set and several independent flows distribute across healthy equal-cost paths. Here the deciding check is different: the affected customer's lookup uses the intended instance RIB and reaches only the destinations deliberately made available to that instance.

Track IPv4 and IPv6 IS-IS reachability separately in dual-stack health checks. The monitored boundary differs from LDP label binding completeness, so the original weakness might reappear unnoticed. LDP supplies label bindings for eligible FECs; IP reachability without a usable label binding does not prove labeled forwarding.

The control protects penultimate hop popping. It does not establish the ongoing LDP label binding completeness behavior required in this network. LDP supplies label bindings for eligible FECs; IP reachability without a usable label binding does not prove labeled forwarding.

This is a useful guard against RSVP PATH and RESV signaling, but it is not scoped to the observed LDP label binding completeness failure. An appropriate test would show that the forwarding table has a valid outgoing label for the selected next hop and labeled traffic reaches the intended prefix.

Account for GRE/IP header overhead in tunnel MTU and path-MTU handling, then test large representative packets. Its normal acceptance signal would be maximum expected encapsulated packets cross the tunnel without fragmentation blackholes or oversized drop counters. Here the deciding check is different: packets to the remote outer endpoint resolve through an ordinary underlay route and GRE probes reach the peer.

Add an approved encryption layer such as IPsec when confidentiality is required, while retaining GRE only if needed for routing encapsulation. That could help in a case involving GRE confidentiality limitation. This failure instead depends on GRE endpoint underlay routing; GRE encapsulates packets between outer IP endpoints; the underlay must route the outer destination before inner traffic can succeed.

Configure and verify compatible protocol graceful-restart capability and planned helper behavior between neighbors. Its normal acceptance signal would be during a controlled routing restart, participating neighbors retain forwarding state only for the permitted grace interval and then converge correctly. Here the deciding check is different: packets to the remote outer endpoint resolve through an ordinary underlay route and GRE probes reach the peer.