Juniper JN0-364 Questions & Answers

This measurement tests IS-IS LSP database synchronization; it cannot distinguish success from failure for the observed VLAN access trunk distinction condition. Access ports and trunk ports have different VLAN tagging and membership behaviors; link-up state does not make the modes equivalent.

The check is meaningful for integrated routing and bridging, but it does not prove that VLAN access trunk distinction was repaired. Access ports and trunk ports have different VLAN tagging and membership behaviors; link-up state does not make the modes equivalent.

The check is meaningful for MAC address learning and moves, but it does not prove that VLAN access trunk distinction was repaired. Access ports and trunk ports have different VLAN tagging and membership behaviors; link-up state does not make the modes equivalent.

This principle matters when troubleshooting IS-IS route redistribution policy, but using it here mistakes a different failure mode for OSPFv3 IPv6 neighbor reachability. The relevant distinction is: OSPFv3 provides OSPF routing for IPv6; successful IPv4 OSPFv2 peering does not establish an IPv6 adjacency.

IS-IS can carry IPv6 topology and prefix information using appropriate TLVs; an IPv4 route table is not a substitute. Those conditions do not account for the specific OSPFv3 IPv6 neighbor reachability problem reported by Meridian Cloud.

This principle matters when troubleshooting IPv6 over IPv4 tunnel underlay, but using it here mistakes a different failure mode for OSPFv3 IPv6 neighbor reachability. The relevant distinction is: OSPFv3 provides OSPF routing for IPv6; successful IPv4 OSPFv2 peering does not establish an IPv6 adjacency.

Inspect the supported and advertised IS-IS reachability TLVs and configure the correct address family on the relevant links. That could help in a case involving IS-IS TLV reachability. This failure instead depends on IS-IS route redistribution policy; IS-IS exports externally originated routes through routing policy; forming an adjacency does not redistribute every route automatically.

Set compatible IS-IS circuit levels on both ends of the interface and verify hello and neighbor state. This addresses IS-IS adjacency circuit level, but the reported symptoms arise from IS-IS route redistribution policy. For this case, verify instead that the intended service route is advertised while nonapproved connected and static prefixes remain outside the IS-IS domain.

Align aggregate generation with present contributing routes and confirm the discard or reject behavior and intentional export policy. That could help in a case involving aggregate route contributor. This failure instead depends on IS-IS route redistribution policy; IS-IS exports externally originated routes through routing policy; forming an adjacency does not redistribute every route automatically.

Align the explicitly approved native and untagged VLAN behavior at both ends and verify tagged versus untagged traffic. This addresses native untagged VLAN drift, but the reported symptoms arise from provider Q-in-Q tagging. For this case, verify instead that captured service frames show the expected outer provider tag and unchanged customer tag, with distinct customers isolated.

Bind the correct VLAN bridge domain to its intended IRB routed interface and verify gateway addressing and routing. Its normal acceptance signal would be hosts reach the expected IRB gateway and traffic between approved subnets is routed rather than bridged blindly. Here the deciding check is different: captured service frames show the expected outer provider tag and unchanged customer tag, with distinct customers isolated.

Restore underlay IP reachability between GRE tunnel endpoints and validate encapsulated probe traffic. Its normal acceptance signal would be packets to the remote outer endpoint resolve through an ordinary underlay route and GRE probes reach the peer. Here the deciding check is different: captured service frames show the expected outer provider tag and unchanged customer tag, with distinct customers isolated.

This measurement tests BGP MED neighbor consideration; it cannot distinguish success from failure for the observed EBGP multihop reachability condition. EBGP sessions to nonadjacent neighbors need suitable multihop TTL and transport reachability; routing reachability alone can be insufficient.

This measurement tests OSPF area LSA propagation; it cannot distinguish success from failure for the observed EBGP multihop reachability condition. EBGP sessions to nonadjacent neighbors need suitable multihop TTL and transport reachability; routing reachability alone can be insufficient.

This measurement tests BGP local preference; it cannot distinguish success from failure for the observed EBGP multihop reachability condition. EBGP sessions to nonadjacent neighbors need suitable multihop TTL and transport reachability; routing reachability alone can be insufficient.

Graceful restart depends on protocol restart and helper behavior; it is not identical to copying live routing protocol state to a backup Routing Engine. That describes graceful restart peer assistance, whereas the observed symptoms are caused by native untagged VLAN drift; it does not predict the reported behavior.

Although provider bridging MTU overhead needs this consideration, the failure at issue has a different cause. A native VLAN determines how untagged frames are classified on a trunk; inconsistent native mappings can silently bridge the wrong domain.

Access ports and trunk ports have different VLAN tagging and membership behaviors; link-up state does not make the modes equivalent. That describes VLAN access trunk distinction, whereas the observed symptoms are caused by native untagged VLAN drift; it does not predict the reported behavior.

Enable supported NSR with required GRES on the platform, then verify routing protocol state replication and switchover behavior. That could help in a case involving NSR protocol state replication. This failure instead depends on graceful restart peer assistance; graceful restart depends on protocol restart and helper behavior; it is not identical to copying live routing protocol state to a backup Routing Engine.

Align LACP negotiation and member compatibility on both ends, then verify collecting and distributing member state. Its normal acceptance signal would be every intended member joins the same aggregation and distributes frames according to the approved LAG hash behavior. Here the deciding check is different: during a controlled routing restart, participating neighbors retain forwarding state only for the permitted grace interval and then converge correctly.

Bind the correct VLAN bridge domain to its intended IRB routed interface and verify gateway addressing and routing. Its normal acceptance signal would be hosts reach the expected IRB gateway and traffic between approved subnets is routed rather than bridged blindly. Here the deciding check is different: during a controlled routing restart, participating neighbors retain forwarding state only for the permitted grace interval and then converge correctly.

This measurement tests GRES preserves forwarding not protocols; it cannot distinguish success from failure for the observed VSTP per-VLAN root choice condition. VSTP maintains spanning-tree behavior per VLAN; one VLAN's root decision does not automatically govern every VLAN.

The check is meaningful for RSTP root protection, but it does not prove that VSTP per-VLAN root choice was repaired. VSTP maintains spanning-tree behavior per VLAN; one VLAN's root decision does not automatically govern every VLAN.

This measurement tests RSTP alternate port reconvergence; it cannot distinguish success from failure for the observed VSTP per-VLAN root choice condition. VSTP maintains spanning-tree behavior per VLAN; one VLAN's root decision does not automatically govern every VLAN.

Review IS-IS export policies against owner-approved prefix and origin criteria after service changes. That ongoing check is for IS-IS route redistribution policy; it would not reliably detect recurrence of OSPF point-to-point topology. OSPF point-to-point interfaces do not use a DR or BDR; this differs from a shared multiaccess Ethernet network.

The control protects OSPF interface metric selection. It does not establish the ongoing OSPF point-to-point topology behavior required in this network. OSPF point-to-point interfaces do not use a DR or BDR; this differs from a shared multiaccess Ethernet network.

The control protects OSPF external route export. It does not establish the ongoing OSPF point-to-point topology behavior required in this network. OSPF point-to-point interfaces do not use a DR or BDR; this differs from a shared multiaccess Ethernet network.

Interpret the advertised implicit-null behavior and verify label disposition on the penultimate LSR and egress. This addresses penultimate hop popping, but the reported symptoms arise from IS-IS LSP database synchronization. For this case, verify instead that the two peers converge to consistent current LSP sequence information and compute the same intended topology reachability.

Align compatible wide-metric support across the IS-IS domain and validate advertised metrics and SPF path selection. This addresses IS-IS wide metrics, but the reported symptoms arise from IS-IS LSP database synchronization. For this case, verify instead that the two peers converge to consistent current LSP sequence information and compute the same intended topology reachability.

Verify LAN circuit type, DIS election priorities, and pseudonode LSP origin under the planned shared-segment design. That could help in a case involving IS-IS LAN designated intermediate system. This failure instead depends on IS-IS LSP database synchronization; IS-IS LSP sequencing and sequence-number PDUs keep link-state databases synchronized; adjacency status alone does not ensure database parity.

The shared connected route exists in both intended RIBs without broadly importing unrelated customer prefixes. That establishes RIB group route sharing rather than a repaired filter-based forwarding table selection path. The reported failure still requires this evidence: only the selected traffic uses the inspection forwarding table while unmatched traffic follows the ordinary destination route.

The check is meaningful for martian source address rejection, but it does not prove that filter-based forwarding table selection was repaired. Filter-based forwarding selects a routing lookup table using packet classification; it does not rewrite the global best route for every packet.

The check is meaningful for GRE tunnel path MTU, but it does not prove that filter-based forwarding table selection was repaired. Filter-based forwarding selects a routing lookup table using packet classification; it does not rewrite the global best route for every packet.