Juniper JN0-364 Questions & Answers

Validate MST digest and instance mapping consistency as part of configuration review. The monitored boundary differs from OSPFv3 IPv6 neighbor reachability, so the original weakness might reappear unnoticed. OSPFv3 provides OSPF routing for IPv6; successful IPv4 OSPFv2 peering does not establish an IPv6 adjacency.

This is a useful guard against IPv6 neighbor discovery filtering, but it is not scoped to the observed OSPFv3 IPv6 neighbor reachability failure. An appropriate test would show that the expected OSPFv3 neighbor reaches Full and IPv6 routes appear with intended next hops.

The control protects IPv6 static next-hop scope. It does not establish the ongoing OSPFv3 IPv6 neighbor reachability behavior required in this network. OSPFv3 provides OSPF routing for IPv6; successful IPv4 OSPFv2 peering does not establish an IPv6 adjacency.

This principle matters when troubleshooting stable OSPF router identifier, but using it here mistakes a different failure mode for OSPF external route export. The relevant distinction is: OSPF external redistribution is controlled by export policy; stable IGP neighbor state does not imply arbitrary static or direct routes are advertised.

Although VRRP virtual gateway failover needs this consideration, the failure at issue has a different cause. OSPF external redistribution is controlled by export policy; stable IGP neighbor state does not imply arbitrary static or direct routes are advertised.

OSPF limits most intra-area LSAs to their areas while ABRs advertise inter-area route information using summary LSAs. That describes OSPF area LSA propagation, whereas the observed symptoms are caused by OSPF external route export; it does not predict the reported behavior.

Although OSPF external route export needs this consideration, the failure at issue has a different cause. GRE adds header bytes, reducing effective payload MTU across an unchanged underlay path.

This principle matters when troubleshooting GRE confidentiality limitation, but using it here mistakes a different failure mode for GRE tunnel path MTU. The relevant distinction is: GRE adds header bytes, reducing effective payload MTU across an unchanged underlay path.

This principle matters when troubleshooting GRE endpoint underlay routing, but using it here mistakes a different failure mode for GRE tunnel path MTU. The relevant distinction is: GRE adds header bytes, reducing effective payload MTU across an unchanged underlay path.

Guard tunnel outer endpoint routes against redistribution into the overlay routing table. That ongoing check is for GRE recursive route avoidance; it would not reliably detect recurrence of OSPFv3 IPv6 neighbor reachability. OSPFv3 provides OSPF routing for IPv6; successful IPv4 OSPFv2 peering does not establish an IPv6 adjacency.

Track IPv4 and IPv6 IS-IS reachability separately in dual-stack health checks. That ongoing check is for IS-IS IPv6 topology TLVs; it would not reliably detect recurrence of OSPFv3 IPv6 neighbor reachability. OSPFv3 provides OSPF routing for IPv6; successful IPv4 OSPFv2 peering does not establish an IPv6 adjacency.

Test ICMPv6 neighbor discovery after applying IPv6 filters or host-security policies. The monitored boundary differs from OSPFv3 IPv6 neighbor reachability, so the original weakness might reappear unnoticed. OSPFv3 provides OSPF routing for IPv6; successful IPv4 OSPFv2 peering does not establish an IPv6 adjacency.

Although graceful restart peer assistance needs this consideration, the failure at issue has a different cause. EBGP sessions to nonadjacent neighbors need suitable multihop TTL and transport reachability; routing reachability alone can be insufficient.

This principle matters when troubleshooting BGP next-hop reachability, but using it here mistakes a different failure mode for EBGP multihop reachability. The relevant distinction is: EBGP sessions to nonadjacent neighbors need suitable multihop TTL and transport reachability; routing reachability alone can be insufficient.

Although BGP import export control needs this consideration, the failure at issue has a different cause. EBGP sessions to nonadjacent neighbors need suitable multihop TTL and transport reachability; routing reachability alone can be insufficient.

The proposal changes OSPF area LSA propagation; that is not the failure isolated by the facts. It could leave OSPF designated router election unresolved even if its own test passed. OSPF broadcast networks elect a DR and BDR; raising priority does not automatically preempt an already elected DR.

Align aggregate generation with present contributing routes and confirm the discard or reject behavior and intentional export policy. This addresses aggregate route contributor, but the reported symptoms arise from OSPF designated router election. For this case, verify instead that the broadcast segment has the planned DR and BDR and expected adjacency states after a controlled election event.

Configure the same intended OSPF area and compatible interface parameters on both ends of the link. Its normal acceptance signal would be the pair establishes the expected OSPF adjacency with matching area assignment and reachable learned prefixes. Here the deciding check is different: the broadcast segment has the planned DR and BDR and expected adjacency states after a controlled election event.

Although BFD fast failure detection needs this consideration, the failure at issue has a different cause. GRES preserves forwarding and kernel state but does not by itself preserve all routing or bridging state; NSB targets bridge continuity and NSR or graceful restart addresses routing continuity.

NSR uses GRES infrastructure while preserving routing protocol state on the backup Routing Engine, avoiding reliance on neighbor restart helpers. That describes NSR protocol state replication, whereas the observed symptoms are caused by GRES preserves forwarding not protocols; it does not predict the reported behavior.

An aggregate route is conditional on active contributing routes and normally uses a discard or reject next hop to avoid creating a forwarding loop. Those conditions do not account for the specific GRES preserves forwarding not protocols problem reported by Seabright Networks.

Although virtual-switch instance isolation needs this consideration, the failure at issue has a different cause. Junos interface VLAN tagging mode and logical-unit encapsulation must match received frame format for successful delivery.

Control-plane LSP state and data-plane label forwarding entries are separate checks; an Up session does not prove the FIB is correct. That describes MPLS label forwarding table mismatch, whereas the observed symptoms are caused by flexible VLAN encapsulation alignment; it does not predict the reported behavior.

Although MAC address learning and moves needs this consideration, the failure at issue has a different cause. Junos interface VLAN tagging mode and logical-unit encapsulation must match received frame format for successful delivery.

The check is meaningful for IS-IS IPv6 topology TLVs, but it does not prove that MPLS label stack bottom bit was repaired. The MPLS S bit identifies the final label in a stack; it does not describe label priority or path preference.

This measurement tests segment routing adjacency SID; it cannot distinguish success from failure for the observed MPLS label stack bottom bit condition. The MPLS S bit identifies the final label in a stack; it does not describe label priority or path preference.

The LSP shows a completed RSVP reservation and an operational signaled path through intended hops. It would validate a separate RSVP PATH and RESV signaling operation, not the change needed here. Confirm instead that traces show the transport label above the service label with bottom-of-stack marked only on the last label.

The check is meaningful for IS-IS NET and system ID, but it does not prove that IS-IS LAN designated intermediate system was repaired. On an IS-IS broadcast LAN the DIS originates pseudonode LSPs and may be re-elected when priority changes; the process differs from OSPF DR behavior.

The check is meaningful for equal-cost forwarding flow hashing, but it does not prove that IS-IS LAN designated intermediate system was repaired. On an IS-IS broadcast LAN the DIS originates pseudonode LSPs and may be re-elected when priority changes; the process differs from OSPF DR behavior.

The two peers converge to consistent current LSP sequence information and compute the same intended topology reachability. That establishes IS-IS LSP database synchronization rather than a repaired IS-IS LAN designated intermediate system path. The reported failure still requires this evidence: the shared LAN shows the intended DIS and pseudonode information, and adjacency remains stable through a controlled election.

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.