Juniper JN0-364 Questions & Answers

The check is meaningful for IS-IS LSP database synchronization, but it does not prove that IS-IS L1 and L2 reachability was repaired. IS-IS uses Level 1 within an area and Level 2 between areas; an L1 router needs an appropriate inter-area exit or route leak.

The check is meaningful for IS-IS route redistribution policy, but it does not prove that IS-IS L1 and L2 reachability was repaired. IS-IS uses Level 1 within an area and Level 2 between areas; an L1 router needs an appropriate inter-area exit or route leak.

The LDP session establishes over reachable transport addresses and peers exchange expected label bindings. It would validate a separate LDP transport address reachability operation, not the change needed here. Confirm instead that the Level 1 router has valid remote-area reachability through the intended L1–L2 boundary without learning the entire L2 topology.

Track IPv4 and IPv6 IS-IS reachability separately in dual-stack health checks. The monitored boundary differs from IS-IS LAN designated intermediate system, so the original weakness might reappear unnoticed. 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 control protects IS-IS L1 and L2 reachability. It does not establish the ongoing IS-IS LAN designated intermediate system behavior required in this network. 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.

Compare advertised TLVs and learned route counts before and after IS-IS feature upgrades. The monitored boundary differs from IS-IS LAN designated intermediate system, so the original weakness might reappear unnoticed. 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.

This principle matters when troubleshooting LDP neighbor discovery, but using it here mistakes a different failure mode for stable OSPF router identifier. The relevant distinction is: OSPF uses the router ID to identify LSA originators; duplicate or unstable IDs undermine link-state identity.

Although OSPF interface metric selection needs this consideration, the failure at issue has a different cause. OSPF uses the router ID to identify LSA originators; duplicate or unstable IDs undermine link-state identity.

OSPF limits most intra-area LSAs to their areas while ABRs advertise inter-area route information using summary LSAs. Those conditions do not account for the specific stable OSPF router identifier problem reported by Jasper Data Works.

Give each router a unique system ID and a NET whose area portion matches intended Level 1 membership. That could help in a case involving IS-IS NET and system ID. This failure instead depends on IS-IS L1 and L2 reachability; IS-IS uses Level 1 within an area and Level 2 between areas; an L1 router needs an appropriate inter-area exit or route leak.

The proposal changes RSTP root protection; that is not the failure isolated by the facts. It could leave IS-IS L1 and L2 reachability unresolved even if its own test passed. IS-IS uses Level 1 within an area and Level 2 between areas; an L1 router needs an appropriate inter-area exit or route leak.

Verify LAN circuit type, DIS election priorities, and pseudonode LSP origin under the planned shared-segment design. Its normal acceptance signal would be the shared LAN shows the intended DIS and pseudonode information, and adjacency remains stable through a controlled election. Here the deciding check is different: the Level 1 router has valid remote-area reachability through the intended L1–L2 boundary without learning the entire L2 topology.

AS-path prepending can make a path less attractive to other ASes but does not override their local policies or guarantee inbound steering. Those conditions do not account for the specific BGP local preference problem reported by Winterfield Utilities.

This principle matters when troubleshooting segment routing prefix SID, but using it here mistakes a different failure mode for BGP local preference. The relevant distinction is: LOCAL_PREF is an intradomain BGP path attribute that normally influences preferred outbound exit for routes inside the AS.

This principle matters when troubleshooting IBGP route reflection, but using it here mistakes a different failure mode for BGP local preference. The relevant distinction is: LOCAL_PREF is an intradomain BGP path attribute that normally influences preferred outbound exit for routes inside the AS.

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 VRRP virtual gateway failover. For this case, verify instead that the same virtual gateway remains reachable when the active VRRP router is failed in a controlled test.

Use supported BFD sessions tied to the relevant routing protocol and validate fast peer failure detection. Its normal acceptance signal would be A controlled link or peer failure causes BFD Down and timely routing reconvergence rather than waiting for long protocol timers. Here the deciding check is different: the same virtual gateway remains reachable when the active VRRP router is failed in a controlled test.

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 VRRP virtual gateway failover; VRRP coordinates an active virtual default gateway among participating routers, unlike independent physical interface addresses.

The control protects OSPF point-to-point topology. It does not establish the ongoing OSPF hello and dead timers behavior required in this network. OSPF neighbor formation requires compatible hello and dead timers; link-layer carrier does not override timer mismatch.

The control protects OSPF area identity mismatch. It does not establish the ongoing OSPF hello and dead timers behavior required in this network. OSPF neighbor formation requires compatible hello and dead timers; link-layer carrier does not override timer mismatch.

This is a useful guard against BGP local preference, but it is not scoped to the observed OSPF hello and dead timers failure. An appropriate test would show that the adjacency remains Full over successive dead intervals without periodic neighbor expiration.

This measurement tests flexible VLAN encapsulation alignment; it cannot distinguish success from failure for the observed provider bridging MTU overhead condition. Provider tag stacking adds frame overhead; an unchanged link MTU may reject frames that previously fitted untagged. Applied here, the relevant facts are: A wholesale carrier accepts ordinary-sized frames but fails jumbo-frame handoff when encapsulation overhead increases the on-wire size. The question asks which observation would most directly establish that the reported failure has been repaired.

This measurement tests penultimate hop popping; it cannot distinguish success from failure for the observed provider bridging MTU overhead condition. Provider tag stacking adds frame overhead; an unchanged link MTU may reject frames that previously fitted untagged.

The same VLAN numbers can exist where supported without unintended MAC or broadcast leakage across isolated virtual switches. That establishes virtual-switch instance isolation rather than a repaired provider bridging MTU overhead path. The reported failure still requires this evidence: tagged test frames of the required service size traverse each handoff without oversize or discard counters rising.

This is a useful guard against aggregate route contributor, but it is not scoped to the observed RIB group route sharing failure. An appropriate test would show that the shared connected route exists in both intended RIBs without broadly importing unrelated customer prefixes.

This is a useful guard against equal-cost forwarding flow hashing, but it is not scoped to the observed RIB group route sharing failure. An appropriate test would show that the shared connected route exists in both intended RIBs without broadly importing unrelated customer prefixes.

Audit MPLS forwarding tables and labeled traffic counters after routing or hardware transitions. That ongoing check is for MPLS label forwarding table mismatch; it would not reliably detect recurrence of RIB group route sharing. A RIB group can install selected routes into additional routing tables; it does not merge isolated forwarding domains indiscriminately.

This measurement tests RIB group route sharing; it cannot distinguish success from failure for the observed static route next-hop resolution condition. Junos installs a usable route only after next-hop resolution and route selection; a configured static statement alone does not guarantee active forwarding.

This measurement tests provider bridging MTU overhead; it cannot distinguish success from failure for the observed static route next-hop resolution condition. Junos installs a usable route only after next-hop resolution and route selection; a configured static statement alone does not guarantee active forwarding.

The inappropriate prefix is absent or rejected while legitimate provider routes remain eligible and active. That establishes martian source address rejection rather than a repaired static route next-hop resolution path. The reported failure still requires this evidence: the intended destination appears as an active route with a resolvable next hop in the routing table and forwarding table.

Compare OSPF area IDs at both ends of every new inter-router link before production cutover. The monitored boundary differs from OSPF interface metric selection, so the original weakness might reappear unnoticed. OSPF chooses lowest-cost paths computed from link-state topology; a Full adjacency alone does not guarantee the desired route preference.

This is a useful guard against OSPF MTU negotiation, but it is not scoped to the observed OSPF interface metric selection failure. An appropriate test would show that the best route's cumulative OSPF cost selects the approved path and changes predictably when the alternative fails.

Test BFD session negotiation and routing reaction times during controlled failures. That ongoing check is for BFD fast failure detection; it would not reliably detect recurrence of OSPF interface metric selection. OSPF chooses lowest-cost paths computed from link-state topology; a Full adjacency alone does not guarantee the desired route preference.