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Cisco 300-615 Exam Syllabus Topics:

SectionWeightObjectives
Network Troubleshooting20%- Troubleshoot routing and switching technologies
  • 1. First-Hop Redundancy Protocols (HSRP, VRRP)
  • 2. Routing protocols (OSPF, BGP, EIGRP)
  • 3. STP, RSTP, and MSTP
  • 4. VPC, vPC Lite
- Troubleshoot overlay tunneling
  • 1. VXLAN
  • 2. NVGRE
Security Troubleshooting10%- Troubleshoot access control
  • 1. RBAC and user roles
  • 2. AAA authentication
- Troubleshoot network segmentation
  • 1. VLANs and VRFs
  • 2. Cisco ACI tenant isolation
Automation Troubleshooting20%- Troubleshoot programmable interfaces
  • 1. NX-API
  • 2. REST API operations
  • 3. Python scripting
- Troubleshoot Cisco ACI
  • 1. APIC fabric discovery
  • 2. Faults and health scores
  • 3. Tenant configuration
  • 4. Contract policies
Compute Platform Troubleshooting20%- Troubleshoot Cisco NX-OS
  • 1. Licensing issues
  • 2. VDC operations
  • 3. Feature troubleshooting
- Troubleshoot Cisco UCS Director
  • 1. Virtual infrastructure workflows
  • 2. Physical infrastructure workflows
- Troubleshoot Cisco UCS Manager
  • 1. UCS Manager clusters
  • 2. Identities and pools
  • 3. Service profiles and templates
Multiprotocol Troubleshooting15%- Troubleshoot Layer 3 connectivity
  • 1. QoS and multicast traffic
  • 2. Multicast (PIM, IGMP)
- Troubleshoot management plane
  • 1. SNMP, Syslog, and NetFlow
  • 2. SPAN, ERSPAN
Storage Network Troubleshooting15%- Troubleshoot NAS
  • 1. SMB troubleshooting
  • 2. NFS troubleshooting
- Troubleshoot FCoE
  • 1. FCoE Initialization Protocol
  • 2. DCB QoS and priority groups
- Troubleshoot Fibre Channel
  • 1. Fibre Channel fabric operations
  • 2. FLOGI, NS, RSCN
  • 3. NPV and NPIV
  • 4. VSANs and zones

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Cisco Troubleshooting Cisco Data Center Infrastructure Sample Questions (Q27-Q32):

NEW QUESTION # 27
Refer to the exhibit.

A switch is being downgraded to an earlier release because of a problem with the current release. After the switch is downgraded, it can no longer forward traffic. Which action resolves the issue?

Answer: B

Explanation:
The answer is Roll back to the original image because Cisco Nexus and ACI forwarding depends on exact agreement between the devices participating in the feature. The scenario references FEX; those technologies fail in predictable ways when required parameters do not match or when the required control-plane advertisement is absent. In DCIT troubleshooting, the engineer should identify the failed dependency, correct that dependency, and then verify the operational table that proves the fix. For example, vPC and EVPN checks focus on consistency, VNI/VRF bindings, peer-gateway behavior, and host-route advertisement; routing checks focus on neighbor state, MTU, timers, authentication, next-hop, and route preference. The selected answer addresses the dependency that blocks forwarding. The distractors are plausible because they touch related features, but they do not resolve the specific failure condition. Post-change validation should include protocol state, learned endpoint or route entries, and a traffic test across the affected path.


NEW QUESTION # 28
Refer to the exhibit. A switch is being downgraded to an earlier release because of a problem with the current release. After the switch is downgraded, it can no longer forward traffic. Which action resolves the issue?

Answer: B


NEW QUESTION # 29
Cisco Unified Computing System Manager raises a critical error message that indicates that the system has overlapping Ethernet and FCoE VLANs. All of the Ethernet traffic on the overlapping VLANs drops. Which action resolves the issue?

Answer: D

Explanation:
Section: Compute Platforms


NEW QUESTION # 30
A maintenance operation on power rail A caused a reboot of the servers in a Cisco UCS B-Series chassis. The Cisco UCS system has these attributes:
* The system is equipped with four PSUs.
* N+1 mode is used.
* PSU 1 and 2 are connected to rail A.
* PSU 3 and 4 are connected to rail B.
Which action prevents server reboot when rail A goes down?

Answer: C

Explanation:
The correct action is Configure nonredundant mode with PSU1 and 3 on A and PSU2 and 4 on B. Cisco UCS troubleshooting depends on the relationship between policy, inventory discovery, firmware state, and server identity. The question involves UCS, so the selected option fixes the UCS component or policy that directly controls the failure. In UCS Manager, service profiles, vNIC/vHBA templates, boot policies, firmware packages, server pools, adapters, fabric interconnects, and I/O modules are applied through a managed model; a server can fail even when basic IP reachability exists if the relevant policy is incomplete or the hardware inventory has not been acknowledged correctly. The distractors typically change an unrelated object, force a disruptive recovery without fixing the policy, or apply to a different UCS mode. Cisco guidance is to verify faults, FSM stage, inventory status, association status, and the specific boot or connectivity policy before taking action. After the remediation, validate that the fault clears, the FSM completes, and the server or fabric component returns to the expected operable state.


NEW QUESTION # 31
Refer to the exhibit.

A network engineer traces the packet flow from the Veth991 of a blade server toward the core switch. The switch reports performance issues What is the role of the interface Eth1/7?

Answer: D

Explanation:
E1/7 is border interface, which is used as uplink. All other veth interfaces are SIF, which stands for Server Interface.


NEW QUESTION # 32
......

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