Pass the Cisco CCNP Data Center 300-615 Questions and answers with Dumpstech

The applet called “Backup” must include an action to remove the current static route is the valid corrective action because the failure described is a protocol or fabric state problem, not a generic connectivity issue. For Cisco Nexus, Cisco troubleshooting expects the engineer to compare both endpoints of the relationship: vPC peers must agree on consistency parameters, HSRP peers must exchange hellos in the same VLAN and version context, OSPF/BGP peers must match the attributes required for stable adjacency, and VXLAN EVPN must advertise the correct host or prefix information. The selected option restores that required state. The other options either operate on the wrong layer, change a value that is not used to form the relationship, or would make the peer relationship less deterministic. A clean validation is to inspect the control-plane table first, then verify the forwarding table, and finally test end-to-end traffic. This is the Cisco-preferred approach because it avoids random changes and confirms that the fabric is forwarding based on correct protocol state.

Cisco troubleshooting logic supports Change channel-group ID from 9 to 2 on N9K-3 as the required fix. In this question the symptoms point to vPC, and the defect is best handled by correcting the exact control-plane or consistency condition. Nexus platforms can show interfaces or peers as configured while still refusing to forward traffic if a vPC Type-1 parameter, VLAN allowance, MTU, HSRP version, EVPN route, or routing attribute is wrong. Cisco methodology is to avoid broad resets unless the state machine is stuck; instead, correct the mismatched parameter and verify that the resulting operational state becomes stable. The other choices do not remove the root cause, or they modify a setting that is not used by the failing protocol exchange. After the change, the engineer should review the peer status, route or MAC table, and counters for drops or inconsistency messages. That sequence proves that the network fabric is fixed, not merely restarted.

The correct remediation is Configure a dedicated Layer 3 link between vPC peers. In Cisco data center troubleshooting, the first priority is to isolate whether the failure is caused by the underlay, overlay control plane, first-hop gateway behavior, or a consistency parameter. This item is centered on vPC, so the selected action targets the condition that prevents normal forwarding rather than masking the symptom. Cisco Nexus and ACI guidance treats vPC, VXLAN EVPN, OTV, OSPF, BGP, HSRP, and LACP issues as state-dependent technologies: a neighbor, peer, VLAN, VNI, multicast group, timer, MTU, or policy mismatch can leave the protocol partially operational while traffic is still dropped. The rejected alternatives either change unrelated attributes, introduce a new inconsistency, or affect only a secondary behavior. The operational check after applying the fix should be to confirm adjacency or peer state, validate the relevant route/MAC/endpoint table, and test traffic in the affected VLAN or VRF. This aligns with Cisco DCIT network troubleshooting methodology for isolating control-plane state before changing data-plane policy.

Configure upstream zoning is the required SAN-side correction. In Cisco storage fabrics, symptoms such as isolated ports, missing targets, failed zone merges, vFC down state, or inaccessible LUNs are rarely solved by changing a random endpoint setting. The engineer must validate the FC control-plane dependency associated with UCS, service profile: VSAN assignment, trunk allowance, FSPF parameters, fcdomain uniqueness, NPIV support, NPV uplink behavior, DCBX/LLDP negotiation, and active zoning. The selected answer is the one that restores that dependency. Other choices may be valid operational commands in a different failure, but they do not address the precise point where fabric membership or access control is broken. Cisco guidance is to verify the active database and the operational database separately because a configured object is not necessarily active in the fabric. Post-remediation checks should include interface state, VSAN status, FLOGI/PLOGI, zoneset membership, and target visibility from the initiator.

The correct remediation is Configure a unicast access list to allow the negotiation between N9K-1 and N9K-2. In Cisco data center troubleshooting, the first priority is to isolate whether the failure is caused by the underlay, overlay control plane, first-hop gateway behavior, or a consistency parameter. This item is centered on OSPF, Cisco Nexus, so the selected action targets the condition that prevents normal forwarding rather than masking the symptom. Cisco Nexus and ACI guidance treats vPC, VXLAN EVPN, OTV, OSPF, BGP, HSRP, and LACP issues as state-dependent technologies: a neighbor, peer, VLAN, VNI, multicast group, timer, MTU, or policy mismatch can leave the protocol partially operational while traffic is still dropped. The rejected alternatives either change unrelated attributes, introduce a new inconsistency, or affect only a secondary behavior. The operational check after applying the fix should be to confirm adjacency or peer state, validate the relevant route/MAC/endpoint table, and test traffic in the affected VLAN or VRF. This aligns with Cisco DCIT network troubleshooting methodology for isolating control-plane state before changing data-plane policy.

The correct remediation is Add VLAN 88 using switchport trunk allowed VLAN add 88 on VTEP1. In Cisco data center troubleshooting, the first priority is to isolate whether the failure is caused by the underlay, overlay control plane, first-hop gateway behavior, or a consistency parameter. This item is centered on VXLAN, Cisco Nexus, Nexus 9000, Cisco Nexus 9000, so the selected action targets the condition that prevents normal forwarding rather than masking the symptom. Cisco Nexus and ACI guidance treats vPC, VXLAN EVPN, OTV, OSPF, BGP, HSRP, and LACP issues as state-dependent technologies: a neighbor, peer, VLAN, VNI, multicast group, timer, MTU, or policy mismatch can leave the protocol partially operational while traffic is still dropped. The rejected alternatives either change unrelated attributes, introduce a new inconsistency, or affect only a secondary behavior. The operational check after applying the fix should be to confirm adjacency or peer state, validate the relevant route/MAC/endpoint table, and test traffic in the affected VLAN or VRF. This aligns with Cisco DCIT network troubleshooting methodology for isolating control-plane state before changing data-plane policy.

Write rule 2 before rule 1 is the required SAN-side correction. In Cisco storage fabrics, symptoms such as isolated ports, missing targets, failed zone merges, vFC down state, or inaccessible LUNs are rarely solved by changing a random endpoint setting. The engineer must validate the FC control-plane dependency associated with MDS, FSPF, RBAC: VSAN assignment, trunk allowance, FSPF parameters, fcdomain uniqueness, NPIV support, NPV uplink behavior, DCBX/LLDP negotiation, and active zoning. The selected answer is the one that restores that dependency. Other choices may be valid operational commands in a different failure, but they do not address the precise point where fabric membership or access control is broken. Cisco guidance is to verify the active database and the operational database separately because a configured object is not necessarily active in the fabric. Post-remediation checks should include interface state, VSAN status, FLOGI/PLOGI, zoneset membership, and target visibility from the initiator.

Cisco troubleshooting logic supports Set the bgp transport path-mtu-discovery attribute on both peers as the required fix. In this question the symptoms point to BGP, and the defect is best handled by correcting the exact control-plane or consistency condition. Nexus platforms can show interfaces or peers as configured while still refusing to forward traffic if a vPC Type-1 parameter, VLAN allowance, MTU, HSRP version, EVPN route, or routing attribute is wrong. Cisco methodology is to avoid broad resets unless the state machine is stuck; instead, correct the mismatched parameter and verify that the resulting operational state becomes stable. The other choices do not remove the root cause, or they modify a setting that is not used by the failing protocol exchange. After the change, the engineer should review the peer status, route or MAC table, and counters for drops or inconsistency messages. That sequence proves that the network fabric is fixed, not merely restarted.

Enable LLDP on the neighbor switch is the correct fix under Cisco SAN troubleshooting practice. The issue described involves VSAN, FCoE, DCBX, LLDP, where the operating state depends on the correct combination of port type, VSAN, fabric service, and access-control database. MDS and Nexus SAN features do not infer missing policy: if the active zoneset, fabric-binding database, fcdomain, NPIV setting, or FCoE/LLDP negotiation is wrong, the link may come up physically but the initiator will not reach the target. The selected answer corrects the missing or mismatched element. The remaining choices either act at the wrong layer, change a non-causal parameter, or provide only a temporary reset. After applying the fix, a proper Cisco validation path is to review show interface, show flogi database, show fcns database, show zoneset active, and any isolation or merge-failure logs. That confirms the storage network is operationally consistent.

FC storage is the required SAN-side correction. In Cisco storage fabrics, symptoms such as isolated ports, missing targets, failed zone merges, vFC down state, or inaccessible LUNs are rarely solved by changing a random endpoint setting. The engineer must validate the FC control-plane dependency associated with FCoE, fabric interconnect: VSAN assignment, trunk allowance, FSPF parameters, fcdomain uniqueness, NPIV support, NPV uplink behavior, DCBX/LLDP negotiation, and active zoning. The selected answer is the one that restores that dependency. Other choices may be valid operational commands in a different failure, but they do not address the precise point where fabric membership or access control is broken. Cisco guidance is to verify the active database and the operational database separately because a configured object is not necessarily active in the fabric. Post-remediation checks should include interface state, VSAN status, FLOGI/PLOGI, zoneset membership, and target visibility from the initiator.