2026 Trustable 300-615: Exam Troubleshooting Cisco Data Center Infrastructure Syllabus

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Cisco 300-615 Exam Syllabus Topics:

SectionObjectives
Troubleshooting Cisco Data Center Infrastructure- Network Infrastructure Troubleshooting
  • 1. Layer 2 and Layer 3 switching and routing issues (Nexus platforms)
    • 2. Routing protocols in data center environments (OSPF, BGP, EIGRP fundamentals)
      • 3. vPC, STP, and link aggregation troubleshooting
        - Automation and Monitoring
        • 1. Log analysis and operational monitoring tools
          • 2. API-based troubleshooting and telemetry
            - Cisco ACI Troubleshooting
            • 1. Contracts, tenants, and policy model troubleshooting
              • 2. Endpoint connectivity and policy enforcement
                • 3. APIC controller and fabric health issues
                  - Compute Infrastructure Troubleshooting
                  • 1. Cisco UCS connectivity and service profile issues
                    • 2. Server-to-fabric integration problems
                      - Storage Networking Troubleshooting
                      • 1. Fibre Channel and SAN connectivity issues
                        • 2. FCoE and storage path troubleshooting

                          >> Exam 300-615 Syllabus <<

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                          Cisco Troubleshooting Cisco Data Center Infrastructure Sample Questions (Q99-Q104):

                          NEW QUESTION # 99
                          An engineer is troubleshooting a " Discovery Failed " error on a Cisco UCS C-Series server. The server is configured to be managed by the fabric interconnect directly The engineer discovered that only the data connection is established with the fabric interconnect Which port must be connected from the server to the fabric interconnect to resolve the issue?

                          Answer: B

                          Explanation:
                          mLOM port is correct because the failure is tied to the UCS managed state of UCS, fabric interconnect. In Cisco UCS, policies are not advisory; they are the source from which fabric interconnects program adapters, boot targets, server identity, firmware, and external integrations. A mismatch between the policy and the actual hardware or upstream storage/network state can cause boot, discovery, KVM, firmware, or connectivity failures. The selected action addresses the object that UCS Manager uses to build the final operational configuration. The distractors either solve a different fault domain or bypass the policy model. A disciplined DCIT validation sequence is to check the fault code, the FSM history, the equipment inventory, the service profile association, and the relevant adapter or boot table. If those states are correct after the change, the UCS component should return to operable service without unnecessary reconfiguration.


                          NEW QUESTION # 100
                          Refer to the exhibit.

                          An engineer must save the running configuration to startup-config and generate a syslog message indicating that the configuration was modified, but an error was received. Which action resolves the issue?

                          Answer: A

                          Explanation:
                          Add event-default as a second action of the EEM script is the required fix because the automation failure is caused by execution context, syntax, or resource state around EEM. On Cisco Nexus switches, automation is not a single feature; EEM policies, CLI actions, Guest Shell Linux commands, REST payloads, and scheduled jobs are evaluated by different subsystems. A script can fail even while the switch itself has connectivity or the command works interactively. The selected answer supplies the missing requirement, such as the correct event/action, DNS or resource setting, API URI, payload format, feature enablement, or reboot needed for a Guest Shell change to take effect. The other choices address adjacent features but do not satisfy the failing subsystem. After applying the fix, the engineer should verify the policy registration, job result, API response code, or Guest Shell runtime state and confirm that the intended command is no longer blocked or silently ignored.


                          NEW QUESTION # 101

                          Refer to the exhibit. Two Cisco Nexus 9000 Series Switches fail to establish OSPF adjacency. Which configuration resolves the issue?

                          Answer: C

                          Explanation:
                          Cisco troubleshooting logic supports N9K2(config)# interface eth1/2 N9K2(config-if)# ip address
                          172.18.1.200/24 as the required fix. In this question the symptoms point to OSPF, Cisco Nexus, Nexus 9000, Cisco Nexus 9000, 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.


                          NEW QUESTION # 102
                          An attempt to use a global vNIC redundancy template pair results in a service profile that fails to apply.
                          Which action resolves the issues?

                          Answer: A

                          Explanation:
                          Section: Compute Platforms


                          NEW QUESTION # 103
                          Refer to the exhibit.

                          A web browser displays a "not secure" warning message when accessing the web interface of Cisco UCS Manager. Which action resolves the issue?

                          Answer: D


                          NEW QUESTION # 104
                          ......

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