Juniper JN0-364 Questions & Answers

Align the explicitly approved native and untagged VLAN behavior at both ends and verify tagged versus untagged traffic. Its normal acceptance signal would be untagged frames map to the intended VLAN on both devices while explicitly tagged VLAN traffic remains isolated. Here the deciding check is different: the MAC address stabilizes on the expected interface and unicast forwarding avoids repeated flooding.

Enable compatible OSPFv3 IPv6 operation on the intended peers and validate neighbor and route state. Its normal acceptance signal would be the expected OSPFv3 neighbor reaches Full and IPv6 routes appear with intended next hops. Here the deciding check is different: the MAC address stabilizes on the expected interface and unicast forwarding avoids repeated flooding.

Place each tenant's ports and VLANs in the intended virtual-switch context and verify independent bridge learning. That could help in a case involving virtual-switch instance isolation. This failure instead depends on MAC address learning and moves; ethernet bridges learn destination forwarding from observed source MAC addresses; unstable topology can continually invalidate learned ports.

Monitor high-frequency MAC moves and correlate them with spanning-tree and bridge-interface events. The monitored boundary differs from integrated routing and bridging, so the original weakness might reappear unnoticed. IRB provides an L3 interface for a Layer 2 VLAN bridge domain; MAC learning alone cannot perform inter-subnet routing.

Validate accepted tag stacks and logical-unit counters when deploying a multi-service port. The monitored boundary differs from integrated routing and bridging, so the original weakness might reappear unnoticed. IRB provides an L3 interface for a Layer 2 VLAN bridge domain; MAC learning alone cannot perform inter-subnet routing.

Include end-to-end MTU alignment and OSPF database exchange checks in circuit acceptance tests. The monitored boundary differs from integrated routing and bridging, so the original weakness might reappear unnoticed. IRB provides an L3 interface for a Layer 2 VLAN bridge domain; MAC learning alone cannot perform inter-subnet routing.

Root protection blocks acceptance of an unexpected superior root across designated boundary ports; it is not the same as BPDU edge protection. Those conditions do not account for the specific VSTP per-VLAN root choice problem reported by Hawthorne Metro.

This principle matters when troubleshooting native untagged VLAN drift, but using it here mistakes a different failure mode for VSTP per-VLAN root choice. The relevant distinction is: VSTP maintains spanning-tree behavior per VLAN; one VLAN's root decision does not automatically govern every VLAN.

Although MSTP region consistency needs this consideration, the failure at issue has a different cause. VSTP maintains spanning-tree behavior per VLAN; one VLAN's root decision does not automatically govern every VLAN.

The control protects GRE recursive route avoidance. It does not establish the ongoing MSTP region consistency behavior required in this network. MSTP region identity depends on consistent name, revision, and VLAN mapping; mismatches create region boundaries.

This is a useful guard against RSTP edge BPDU protection, but it is not scoped to the observed MSTP region consistency failure. An appropriate test would show that adjacent devices report matching MST region configuration and VLANs map to the same intended instances.

This is a useful guard against RSTP loop protection, but it is not scoped to the observed MSTP region consistency failure. An appropriate test would show that adjacent devices report matching MST region configuration and VLANs map to the same intended instances.

MSTP region identity depends on consistent name, revision, and VLAN mapping; mismatches create region boundaries. Those conditions do not account for the specific RSTP loop protection problem reported by Highpoint Exchange.

This principle matters when troubleshooting flexible VLAN encapsulation alignment, but using it here mistakes a different failure mode for RSTP loop protection. The relevant distinction is: loop protection protects non-designated ports against false transition to forwarding when expected BPDUs disappear.

Although VSTP per-VLAN root choice needs this consideration, the failure at issue has a different cause. Loop protection protects non-designated ports against false transition to forwarding when expected BPDUs disappear.

The proposal changes IBGP route reflection; that is not the failure isolated by the facts. It could leave RSVP path bandwidth admission unresolved even if its own test passed. RSVP traffic engineering applies resource reservation and constrained path selection, not merely IP shortest-path routing.

The proposal changes penultimate hop popping; that is not the failure isolated by the facts. It could leave RSVP path bandwidth admission unresolved even if its own test passed. RSVP traffic engineering applies resource reservation and constrained path selection, not merely IP shortest-path routing.

Verify full label stack ordering and bottom-of-stack indication on the encapsulated service path. Its normal acceptance signal would be traces show the transport label above the service label with bottom-of-stack marked only on the last label. Here the deciding check is different: the intended LSP is admitted on a path satisfying its bandwidth constraints without oversubscribing reserved resources.

Inspect the IS-IS link-state database and CSNP/PSNP exchange to resolve synchronization or flooding problems. This addresses IS-IS LSP database synchronization, but the reported symptoms arise from IS-IS TLV reachability. For this case, verify instead that link-state PDUs include the intended reachability TLVs and the matching routes populate peer routing tables.

Enable and inspect the relevant IS-IS IPv6 address-family reachability advertisements and verify eligible routes. That could help in a case involving IS-IS IPv6 topology TLVs. This failure instead depends on IS-IS TLV reachability; IS-IS uses TLVs inside its PDUs to encode prefix and protocol capabilities; adjacency alone is not proof of expected reachability advertisements.

The proposal changes IS-IS adjacency circuit level; that is not the failure isolated by the facts. It could leave IS-IS TLV reachability unresolved even if its own test passed. IS-IS uses TLVs inside its PDUs to encode prefix and protocol capabilities; adjacency alone is not proof of expected reachability advertisements.

The check is meaningful for OSPF point-to-point topology, but it does not prove that OSPF area identity mismatch was repaired. OSPF area identity is part of neighbor compatibility, and mismatched area membership prevents formation of the intended adjacency.

The approved external route is advertised with the intended type and metric while unapproved routes are not redistributed. It would validate a separate OSPF external route export operation, not the change needed here. Confirm instead that the pair establishes the expected OSPF adjacency with matching area assignment and reachable learned prefixes.

The same virtual gateway remains reachable when the active VRRP router is failed in a controlled test. It would validate a separate VRRP virtual gateway failover operation, not the change needed here. Confirm instead that the pair establishes the expected OSPF adjacency with matching area assignment and reachable learned prefixes.

Interpret the advertised implicit-null behavior and verify label disposition on the penultimate LSR and egress. That could help in a case involving penultimate hop popping. This failure instead depends on segment routing adjacency SID; an adjacency SID steers traffic across a specific link, whereas a prefix SID steers toward a node or prefix along shortest paths.

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 segment routing adjacency SID; an adjacency SID steers traffic across a specific link, whereas a prefix SID steers toward a node or prefix along shortest paths.

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: packet traces follow the specified adjacency rather than merely the IGP shortest path to a node SID.

The peer moves to Established with the agreed local and remote AS values and appropriate session messages. That establishes BGP ASN and OPEN negotiation rather than a repaired GRE tunnel path MTU path. The reported failure still requires this evidence: maximum expected encapsulated packets cross the tunnel without fragmentation blackholes or oversized drop counters.

The check is meaningful for GRE confidentiality limitation, but it does not prove that GRE tunnel path MTU was repaired. GRE adds header bytes, reducing effective payload MTU across an unchanged underlay path.

Packets to the remote outer endpoint resolve through an ordinary underlay route and GRE probes reach the peer. That establishes GRE endpoint underlay routing rather than a repaired GRE tunnel path MTU path. The reported failure still requires this evidence: maximum expected encapsulated packets cross the tunnel without fragmentation blackholes or oversized drop counters. Applied here, the relevant facts are: Small test packets traverse GRE successfully, but large customer packets drop after transport encapsulation adds overhead. The question asks which observation would most directly establish that the reported failure has been repaired.

This measurement tests BGP ASN and OPEN negotiation; it cannot distinguish success from failure for the observed BGP MED neighbor consideration condition. MED is a BGP path hint with lower values generally preferred when compared; it is not a guarantee of inbound routing across arbitrary networks.

This measurement tests RIB group route sharing; it cannot distinguish success from failure for the observed BGP MED neighbor consideration condition. MED is a BGP path hint with lower values generally preferred when compared; it is not a guarantee of inbound routing across arbitrary networks.

The received BGP route has a resolvable next hop, becomes eligible, and installs usable forwarding state. That establishes BGP next-hop reachability rather than a repaired BGP MED neighbor consideration path. The reported failure still requires this evidence: comparably eligible paths carry intended MEDs and route selection in the agreed test case follows the planned preference.