Cisco Troubleshooting Cisco Data Center Infrastructure (300‑615 DCIT) Practice Exams
About the Cisco 300-615 DCIT exam
Exam at a glance
Professional tier. CCNP Data Center concentration focused on operational troubleshooting. 55-65 questions, 90 minutes, variable passing score (Cisco does not publish a fixed cut), $300 USD. Valid 3 years and eligible for continuing-education (CE) recertification.
Domain weighting
- Network — 25%
- Compute Platforms — 25%
- Storage Network — 15%
- Automation — 15%
- Management and Operations — 20%
How it pairs with the CCNP DC core
300-615 DCIT is one of six concentration exams in the CCNP Data Center track. The mandatory core is 350-601 DCCOR. DCIT is the operations-and-troubleshooting concentration; it complements the design-focused 300-610 DCID, the ACI-focused 300-620 DCACI, and the automation-focused 300-635 DCNAUTO. Passing 350-601 + 300-615 alone earns the full CCNP Data Center plus a "Cisco Certified Specialist - Data Center Operations" badge.
Prerequisites
No formal prerequisites. Cisco recommends 3-5 years of hands-on data center experience with Nexus switches, UCS compute, and FC / FCoE storage networking. Comfort reading show command output and interpreting APIC faults under time pressure is essential.
Why take this certification
- Operations-focused credential. Where DCID validates greenfield design, DCIT validates day-2 reality: failed VPC consistency checks, endpoint flap on ACI leaves, UCS service profile association failures, FC zoning name-server timeouts. It is the credential operations and TAC-facing engineers actually use.
- Counts toward Cisco Certified Specialist. Passing 300-615 alone earns the "Cisco Certified Specialist - Data Center Operations" credential, which is a meaningful resume item even before completing CCNP.
- Competitive salary in DC ops roles. Senior data center engineers holding CCNP DC with a troubleshooting focus typically earn $115,000-$140,000 USD in the US market — DCIT-holding engineers are the people fault-isolating fabric outages at 3am, and that is reflected in compensation.
- Continuing-education recertification. Unlike the entry-level CCNA path, CCNP credentials renew through Cisco's CE program. 40 CE credits cover a CCNP renewal — vendor training, Cisco Live sessions, and authoring activities all qualify.
What you'll learn in the 300-615 DCIT exam
DCIT is built around scenario-based fault isolation. Most questions hand you a symptom (an endpoint that won't learn, a blade that won't boot, an LUN that's invisible) and a fragment of show / debug output, and ask you which next command, configuration change, or fault hypothesis is correct. The Cisco DCIT exam topics are the canonical reference.
Nexus and ACI fabric troubleshooting
- Nexus / NX-OS — interpret
showoutput for VPC peer consistency, OSPF / BGP underlay neighbor state, MAC and ARP tables, port-channel hashing. - Packet captures via SPAN and ERSPAN — configure source / destination sessions, validate capture filters, troubleshoot truncated frames.
- Fabric debug — NX-OS
ethanalyzer, control-plane policing (CoPP) hits, hardware drop counters on Nexus 9000. - Leaf-spine path validation — VXLAN underlay reachability, ECMP hashing inconsistencies, BUM traffic via head-end replication vs PIM.
- APIC fault hierarchy — read fault severity, lifecycle (raised → soaking → cleared), and rollup; map a fault back to the offending tenant / EPG / contract object.
UCS troubleshooting
- UCS Manager faults — major / critical fault triage, blade discovery failures, chassis IOM connectivity, FEX uplink port-channel issues.
- Blade boot issues — KVM console capture, BIOS POST faults, vNIC / vHBA placement order, boot policy LUN mismatch.
- FI failover — cluster state with
show cluster extended-state, primary/subordinate split-brain, management plane vs data plane impact. - Service profile association — pool exhaustion (UUID, MAC, WWN), policy resolution order, maintenance policies blocking changes.
FC / FCoE storage networking
- fcping and fctrace — validate end-to-end FC reachability, isolate fabric hops, identify zoning vs name-server failures.
- Zoning verification — active vs full zoneset diffs, smart zoning, soft zoning leakage symptoms.
- NPV and NPIV — N_Port virtualization on UCS FIs and edge MDS, FLOGI vs FDISC, server-facing F-ports.
- Name server — registered initiators / targets, FCNS database queries, missing FC4-Type entries.
- Storage path failures — multipath flapping, host-side ALUA misconfiguration, FCoE DCBX TLV mismatch causing pause-frame storms.
VXLAN/EVPN and ACI EPG/contract debugging
- VXLAN/EVPN — BGP EVPN route-types (RT-2 host, RT-3 IMET, RT-5 prefix), MAC mobility loops, anycast gateway inconsistency.
- ACI EPG and contracts — provider/consumer mismatch, filter directionality, contract scope (tenant / VRF / global), preferred group exceptions, vzAny shortcuts.
- Endpoint learning — local vs XR (remote) endpoint flags, COOP database, silent host symptoms after vMotion.
How the practice exams help
Each free question and every premium exam mirrors the DCIT format Cisco actually uses — a symptom, a slice of show / fault output, and one or two correct corrective actions. Explanations cover not just the right answer but why the distractors are misleading (e.g. why "reload the FI" looks plausible but breaks the data plane).
How to prepare for the 300-615 DCIT exam
DCIT rewards engineers who can actually drive Nexus, UCS, and APIC CLIs — paper study alone fails this exam. A realistic plan blends documentation review with sandbox practice. Recommended sequence:
- Map the blueprint (1 week). Read the official DCIT exam topics end-to-end and inventory every bullet against your current familiarity. Cisco lists each topic at the granularity they test — treat every sub-bullet as a study item.
- Study from Cisco Press DCIT guide (4-6 weeks). The CCNP Data Center Troubleshooting DCIT 300-615 Official Cert Guide from Cisco Press is the canonical study resource — it walks through every blueprint topic with worked show / debug output. Pair each chapter with the matching DevNet sandbox (Nexus, ACI, UCS sandboxes are free).
- Hands-on lab time (3-4 weeks). Use the Cisco DevNet Always-On ACI sandbox, the Nexus 9000 emulator (NX-OSv 9000), and UCS Platform Emulator (UCSPE) to break and fix things on purpose. Practice reading APIC faults, interpreting
show vpc consistency-parametersoutput, and stepping through a failed service profile association. - Practice exams (1-2 weeks). Take timed practice exams to surface weak domains. Aim for consistent upper-80s scores before scheduling — Cisco's variable cut score means there's no safe floor at 70-75%.
Recommended timeline
12-16 weeks of focused study (10-15 hours per week) for engineers with 2-3 years of Nexus / UCS exposure. Engineers new to a particular pillar (e.g. UCS or ACI) should add 4 weeks to deep-dive that area before attempting integrated troubleshooting questions.
Official resources
Download the official DCIT exam topics blueprint and read the Cisco Press DCIT 300-615 Official Cert Guide. Cisco's Learning Network DCIT community hosts blueprint-aligned study groups and recent test-takers' notes.