DoIP Testing Guide - ISO 13400 Automotive Ethernet

Q: Do I need special hardware for DoIP testing?

No. DoIP uses standard TCP and UDP over Ethernet. TestBot's DoIP Client Agent communicates over your PC's built-in network interface - you only need a standard Ethernet cable between your PC and the ECU's Ethernet port. No USB adapter, no specialised hardware.

Q: What is routing activation in DoIP?

Routing activation is the DoIP handshake that grants a tester access to the vehicle's diagnostic bus through the DoIP gateway. The tester sends a Routing Activation Request with its source address and activation type. The gateway responds with a Routing Activation Response indicating success or failure. Without successful routing activation, no diagnostic messages can be forwarded.

Q: Can TestBot run UDS diagnostics over DoIP?

Yes. The UDS over DoIP Client Agent combines DoIP transport (ISO 13400) with UDS application layer (ISO 14229). All 22 UDS services - session management, DID read/write, fault memory, security access, flash programming - run over DoIP with no change to the service requests. DoIP is the transport; UDS is the application.

Q: How does DoIP handle multiple ECUs behind a gateway?

DoIP uses logical addresses to route diagnostic messages to specific target ECUs behind a gateway. Each ECU has a unique logical address. The DoIP gateway forwards messages to the correct ECU and returns responses to the tester. TestBot's DoIP Client Agent supports multiple logical addresses in a single test sequence.

Q: Can I test DoIP in CI/CD without physical ECU hardware?

The DoIP Client Agent can validate DoIP protocol behaviour over any Ethernet connection. For full ECU validation, a physical ECU (or ECU simulator) is needed. For validating a diagnostic tool's DoIP implementation, the DoIP Server Agent simulates a DoIP gateway - enabling CI/CD validation of diagnostic software without hardware.

WHAT IS DoIP TESTING?

DoIP (Diagnostics over Internet Protocol) testing is the validation of ISO 13400-compliant diagnostic communication over Ethernet - verifying that an ECU's DoIP gateway correctly handles vehicle announcement, routing activation, diagnostic message transport, and connection management.

DoIP (ISO 13400) is the modern replacement for DoCAN (ISO 15765-2) in Ethernet-connected ECUs. As vehicles move to zonal architectures, domain controllers, and central compute units, Ethernet becomes the primary backbone - and DoIP is how diagnostic tools communicate with these ECUs. Every EV platform, ADAS domain controller, and central ECU introduced in the last five years uses DoIP.

Why DoIP testing requires no hardware: DoIP runs over standard TCP/UDP on Ethernet. TestBot's DoIP Client Agent communicates directly over your PC's built-in network port - no USB adapter, no specialised hardware, no PXI chassis. Connect an Ethernet cable from your PC to the ECU's Ethernet port and start testing.

DoIP COMMUNICATION FLOW

What Happens in a DoIP Diagnostic Session

Steps

Vehicle Announcement The DoIP entity (gateway or ECU) broadcasts a Vehicle Announcement UDP message on the network. Testing validates the announcement contains the correct VIN, EID, and GID within the timing window after power-up.

Routing Activation The tester sends a Routing Activation Request to the DoIP entity. The entity responds with a Routing Activation Response granting or denying diagnostic access. Testing validates correct routing activation for each logical address.

Diagnostic Message Transport Once activated, UDS PDUs are sent as DoIP Diagnostic Messages over TCP. The DoIP entity forwards them to the target ECU over the internal vehicle network. Testing validates correct PDU forwarding, response timing, and connection management.

Connection Management DoIP connections have configurable timeout values. Testing validates that the DoIP entity correctly handles connection teardown on timeout, TesterPresent keepalive, and multi-client scenarios.

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TESTBOT DoIP AGENTS

DoIP Test Agents

TestBot's DoIP Client Agent sends routing activation and diagnostic messages over Ethernet. The UDS over DoIP Client Agent runs full ISO 14229 sessions transported over DoIP. Both run over your PC's built-in NIC - no hardware required.

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Agent

Hardware Required

Description

Agent

DoIP Client Agent

Hardware Required

None - PC Ethernet

Hardware Required

Send DoIP vehicle announcement, routing activation, and diagnostic requests over Ethernet - essential for EV and ADAS ECU validation.

Agent

DoIP Server Agent

Hardware Required

None - PC Ethernet

Hardware Required

Simulate a DoIP gateway - test tester tools and diagnostic clients against a controlled virtual Ethernet ECU.

Agent

UDS over DoIP Client Agent

Hardware Required

None - PC Ethernet

Hardware Required

Run full UDS ISO 14229 diagnostic sequences transported over DoIP Ethernet - next-generation ECU diagnostics for domain controllers and EV platforms.

Agent

UDS over DoIP Server Agent

Hardware Required

None - PC Ethernet

Hardware Required

Simulate an Ethernet ECU responding to UDS diagnostic requests over DoIP - validate diagnostic clients without real vehicle hardware.

Agent

SOME/IP Client Agent

Hardware Required

None - PC Ethernet

Hardware Required

Call SOME/IP services, subscribe to events, and validate AUTOSAR Adaptive middleware communication on domain controllers and central compute units.

Agent

SOME/IP Server Agent

Hardware Required

None - PC Ethernet

Hardware Required

Simulate an AUTOSAR Adaptive service provider - offer SOME/IP services and publish events to validate client devices and gateways.

Agent

XCP Server Agent (Ethernet)

Hardware Required

None - PC Ethernet

Hardware Required

Simulate an XCP slave over Ethernet - high-speed calibration and DAQ measurement workflows for Ethernet-connected ECUs.

TEST SCENARIOS

DoIP Test Scenarios With TestBot

Scenario	Agents Used	Validated Outcome
Vehicle Announcement Validation	DoIP Client Agent - UDP announcement monitor	Announcement received within 500ms of power-up, VIN and EID correct
Routing Activation	DoIP Client Agent - routing activation request	Routing Activation Response received with correct logical address and ACK code
UDS DID Read over DoIP	UDS over DoIP Client Agent - 0x22 ReadDataByIdentifier	DID value received correctly via DoIP transport; response time within spec
ECU Flash over DoIP	UDS over DoIP Client Agent - 0x34–0x37 flash sequence	Full firmware download completed over Ethernet, ECU boots correctly
DoIP Gateway Multi-ECU Access	DoIP Client - multiple logical addresses	Gateway routes diagnostic messages to each sub-ECU correctly using distinct logical addresses
Connection Timeout Behaviour	DoIP Client - TesterPresent + timeout test	Connection maintained with TesterPresent keepalive; correctly closed after timeout

Frequently Asked Questions - DoIP Testing

What is DoIP and why is it replacing DoCAN?

DoIP (Diagnostics over Internet Protocol, ISO 13400) transports diagnostic messages over Ethernet instead of CAN. It is replacing DoCAN (ISO 15765-2, diagnostic messages over CAN) because modern vehicle architectures use Ethernet as the primary backbone for domain controllers, central compute units, and EV platforms. Ethernet's higher bandwidth also enables faster ECU software updates.

Do I need special hardware for DoIP testing?

What is routing activation in DoIP?

Can TestBot run UDS diagnostics over DoIP?

How does DoIP handle multiple ECUs behind a gateway?

Can I test DoIP in CI/CD without physical ECU hardware?

DoIP Testing Guide - ISO 13400 Automotive Ethernet Diagnostics

WHAT IS DoIP TESTING?

What Happens in a DoIP Diagnostic Session

Steps

TESTBOT DoIP AGENTS

DoIP Test Agents

DoIP Test Scenarios With TestBot

Frequently Asked Questions - DoIP Testing

RELATED GUIDES

UDS Testing Guide

SOME/IP Testing Guide

Automotive Agents

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