PCAP traffic analysis
Inspect captured Automotive Ethernet traffic with Wireshark, reviewing timestamps, headers, communication sequences, and relevant DoIP or SOME/IP activity.
Vehicle Networks & Communication
Analyze Automotive Ethernet packet captures
Automotive Ethernet analysis uses packet captures to investigate communication sequences and unexpected timing. I isolate the relevant endpoints and exchanges, compare failing and reference cases, and document what the capture establishes about discovery, transport, or application behavior.
Discuss Automotive Ethernet AnalysisProblems I can investigate
Find the behavior behind the symptom
- 01
DoIP connection failure
Analyze cases where diagnostic discovery, routing activation, or TCP communication cannot be established. PCAP review and interface comparison can help narrow whether the issue is related to observed network traffic, expected interfaces, or integration behavior.
- 02
Network timing issue
Examine message periods, latency, ordering, and timeouts that do not match expected network behavior. Findings are tied to captured evidence and the supplied interface expectations rather than assumptions about ECU behavior.
What I can help with
Focused engineering work in Vehicle Networks & Communication
Diagnostic communication investigation
Trace UDS communication carried over DoIP to assess discovery, routing activation, and diagnostic transport behavior visible in the available evidence.
Timing and sequence analysis
Compare observed message timing, ordering, latency, and timeouts against the supplied interface specification and problem description.
Network integration troubleshooting
Support integration teams by connecting packet-level findings with Automotive Ethernet interfaces, SOME/IP communication, and diagnostic expectations.
What to send
Start with the evidence you already have
PCAP
Packet captures containing the relevant network traffic, including timestamps and available headers.
Interface specification
Definitions of messages, APIs, signals, or component interfaces used to compare expected and observed behavior.
Problem description
Observed symptoms, context, reproduction steps, and expected behavior, including any known timing or connection conditions.
How the analysis works
From recorded data to engineering findings
- 01
Scope the observed issue
Review the problem description, expected behavior, and available interface information to define the communication path and evidence to inspect.
- 02
Inspect captured traffic
Analyze the supplied PCAP with Wireshark, tracing relevant Automotive Ethernet, DoIP, SOME/IP, and UDS activity where present.
- 03
Compare behavior with expectations
Assess message timing, ordering, latency, timeouts, discovery, routing activation, and communication sequences against the supplied specification.
- 04
Document findings and next actions
Separate observed evidence from engineering interpretation, identify likely contributing conditions where supported, and provide integration guidance.
What you receive
Deliverables matched to the investigation
Engineering analysis
A documented technical analysis with evidence, examined communication sequences, and findings from the available PCAP and interface information.
Root-cause report
A report identifying the cause of a reproducible or intermittent issue when the available evidence supports a defensible conclusion.
Integration support
Engineering changes, investigation, and guidance for integrating Automotive Ethernet communication, DoIP, SOME/IP, or UDS behavior.
Technologies & formats
Automotive data and analysis environments
- Automotive Ethernet
Automotive Ethernet
Automotive physical and data-link networking based on Ethernet.
- SOME/IP
Scalable service-Oriented MiddlewarE over IP
An automotive middleware protocol for service-oriented communication over IP.
- DoIP
Diagnostics over Internet Protocol
Diagnostic transport over IP networks as defined by ISO 13400.
- PCAP
Packet Capture
A captured sequence of network packets with timestamps and headers.
- Wireshark
Wireshark
A packet analyzer for capturing, decoding, and inspecting network traffic.
- UDS
Unified Diagnostic Services
ISO 14229 diagnostic services for communicating with vehicle ECUs.
FAQ
Practical questions before an investigation
- What can a PCAP reveal about an Automotive Ethernet fault?
- A PCAP can show the packets visible at its capture point, their recorded order, and their timestamps. It may expose missing exchanges or retries, but cannot by itself prove physical-link health or show traffic that was not captured. Capture location, filters, and clock behavior affect the interpretation.
- What is needed to start an Automotive Ethernet analysis?
- The most useful starting inputs are the relevant PCAP, the interface specification, and a problem description covering symptoms, reproduction steps, and expected behavior.
- Can you investigate a DoIP connection failure?
- Yes. The analysis can examine diagnostic discovery, routing activation, and TCP communication in the available traffic, then compare the observations with the supplied interface expectations.
- Can timing issues be analyzed from a PCAP?
- Yes. A PCAP can be reviewed for message periods, latency, ordering, and timeouts, with conclusions limited to the behavior visible in the capture and related specifications.
- Does the service cover SOME/IP and UDS?
- Yes, when they are present in the supplied network evidence or interface information. The analysis focuses on the communication behavior relevant to the reported issue.
Discuss the evidence
Discuss Automotive Ethernet Analysis
Send the PCAP, interface specification, and problem description for an initial review of the Automotive Ethernet issue.