ISO 21111-10:2021

Overview

ISO 21111-10:2021 defines conformance test plans (CTPs) for the transport layer and network layer of in-vehicle Ethernet. Intended for electronic control units (ECUs) and automotive network devices, this part of the ISO 21111 series consolidates recommended conformance test cases that car manufacturers and suppliers should reference in quality control and verification processes. The standard focuses on protocol-level validation for in-vehicle Ethernet networks rather than physical-layer safety or EMC.

Key Topics

• Scope and structure of CTPs: test system set-up, CTC (conformance test case) structure, terminology and conventions used in test specifications.
• IUT prerequisites and test harness: requirements for the Implementation Under Test (IUT), including the TCP/IP TestStub service primitives and expected result codes.
• Network-layer protocols covered:
  • Address Resolution Protocol (ARP)
  • Internet Control Message Protocol v4 (ICMPv4)
  • Internet Protocol v4 (IPv4)
  • IPv4 link-local auto-configuration (autoconf)
• Transport-layer protocols covered:
  • User Datagram Protocol (UDP)
  • Transmission Control Protocol (TCP)
  • Dynamic Host Configuration Protocol v4 (DHCPv4)
• Test topologies and parameters: predefined test system topologies, CTC configurations, protocol parameters and constants used in test cases.
• Conformance test content: comprehensive test cases for behavior verification, timing, packet handling and error responses per protocol.

Applications

• Automotive manufacturers (OEMs): integrate ISO 21111-10 into ECU and network validation to ensure protocol conformance across vehicle Ethernet domains.
• ECU and gateway suppliers: use the CTPs to validate device implementations of ARP, ICMPv4, IPv4, UDP, TCP and DHCPv4 before delivery.
• Test labs and tool vendors: implement test systems and test harnesses that follow the standard’s CTC structure, topologies and TCP/IP TestStub interfaces.
• System integrators and QA teams: adopt the tests for regression, interoperability and production quality control to reduce network defects and improve reliability of in-vehicle Ethernet stacks.

Related standards

• ISO 21111 series (other parts covering physical, data link and higher OSI layers)
• ISO/IEC/IEEE 8802-3 (Ethernet PHY and MAC family)
• ISO/IEC 7498-1 and ISO/IEC 10731 (OSI model references)

ISO 21111-10:2021 is essential for anyone responsible for automotive Ethernet testing, protocol conformance and ECU network reliability. Integrating these CTPs supports robust in-vehicle networking and smoother supplier-to-OEM validation workflows.