ISO/IEC 8473-2:1996 PDF

Information technology — Protocol for providing the connectionless-mode network service — Part 2: Provision of the underlying service by an ISO/IEC 8802 subnetwork

First page of standard ISO/IEC 8473-2:1996

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Title (English):

ISO/IEC 8473-2:1996

Information technology — Protocol for providing the connectionless-mode network service — Part 2: Provision of the underlying service by an ISO/IEC 8802 subnetwork

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 9
Publication date:: March 14, 1996
Edition:: ISO/IEC IS 8473 edition 1 version 1
ICS:: 35.100.30

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Description (English):

Differs from the other related International Standards by the layers defined in ISO/IEC 7498-1. In particular, it defines the way in which a local area network that conforms to ISO/IEC 8802 may be used as a subnetwork within the network layer to provide the abstract underlying service with respect to which the protocol defined by ISO/IEC 8473-1 is specified.

Technical details

Technical committee: ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systems
SKU: ISO/IEC 8473-2:1996

Abstract

Overview

ISO/IEC 8473-2:1996 specifies how a local area network conforming to ISO/IEC 8802 can be used as a subnetwork to provide the abstract underlying service for the connectionless-mode network protocol (CLNP) defined in ISO/IEC 8473‑1. Part of the ISO/IEC 8473 series, this part defines the subnetwork dependent convergence function (SNDCF) that maps between CLNP’s network-layer assumptions and the ISO/IEC 8802 logical link control (LLC) services offered by LANs.

Key topics and requirements

Subnetwork Dependent Convergence Function (SNDCF): Defines the mapping of CLNP SN-UNITDATA primitives to subnetwork-specific UNITDATA primitives and back, for both connectionless- and connection-mode subnetworks.
Use of ISO/IEC 8802 LLC: Specifies that the unacknowledged connectionless-mode service provided by LLC Class 1 (and Class 2’s connectionless mode) is used to supply the CLNP underlying service.
Service data unit (SDU) size: The underlying service must support a minimum SDU size of 512 octets; SNDCF must handle segmentation where subnetworks have smaller PDUs.
Primitives and addressing: Mapping involves primitives such as DL-UNITDATA with parameters (DL-Source-Address, DL-Destination-Address, DL-Priority, DL-Data). LAN station addresses are seven-octet values (six-octet MAC + one-octet LLC SAP).
Protocol identification: Data received with protocol identification for ISO/IEC 8473 must be processed per ISO/IEC 8473‑1; other protocol IDs should be ignored.
Conformance testing support: Annex A supplies a PICS (Protocol Implementation Conformance Statement) proforma - normative - to document implemented capabilities and options for conformance and interoperability testing.

Applications and who uses it

Network protocol implementers building CLNP stacks that operate over IEEE 802 LANs.
LAN and network equipment manufacturers (switches, NICs) that must support SNDCF behaviors and addressing conventions.
System integrators and network architects designing OSI-layered interconnection across Ethernet/802 networks.
Test labs and QA teams performing conformance testing and interoperability validation using the provided PICS proforma.
Organizations maintaining or migrating legacy OSI/CLNP deployments where standardized CLNP-over-802 behavior is required.

Related standards

ISO/IEC 8473-1: CLNP protocol specification
ISO/IEC 7498-1: OSI Basic Reference Model
ISO/IEC 8348: Network service definition
ISO/IEC 8648: Network layer internal organization
ISO/IEC 8802-2: LLC (logical link control)
ISO/IEC 9646-1: Conformance testing methodology

ISO/IEC 8473-2 is essential when you need a standards-based mapping of CLNP to IEEE 802 LANs, ensuring predictable addressing, SDU handling, and a documented basis for conformance and interoperability testing.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and requirements

Subnetwork Dependent Convergence Function (SNDCF): Defines the mapping of CLNP SN-UNITDATA primitives to subnetwork-specific UNITDATA primitives and back, for both connectionless- and connection-mode subnetworks.
Use of ISO/IEC 8802 LLC: Specifies that the unacknowledged connectionless-mode service provided by LLC Class 1 (and Class 2’s connectionless mode) is used to supply the CLNP underlying service.
Service data unit (SDU) size: The underlying service must support a minimum SDU size of 512 octets; SNDCF must handle segmentation where subnetworks have smaller PDUs.
Primitives and addressing: Mapping involves primitives such as DL-UNITDATA with parameters (DL-Source-Address, DL-Destination-Address, DL-Priority, DL-Data). LAN station addresses are seven-octet values (six-octet MAC + one-octet LLC SAP).
Protocol identification: Data received with protocol identification for ISO/IEC 8473 must be processed per ISO/IEC 8473‑1; other protocol IDs should be ignored.
Conformance testing support: Annex A supplies a PICS (Protocol Implementation Conformance Statement) proforma - normative - to document implemented capabilities and options for conformance and interoperability testing.

Applications and who uses it

Network protocol implementers building CLNP stacks that operate over IEEE 802 LANs.
LAN and network equipment manufacturers (switches, NICs) that must support SNDCF behaviors and addressing conventions.
System integrators and network architects designing OSI-layered interconnection across Ethernet/802 networks.
Test labs and QA teams performing conformance testing and interoperability validation using the provided PICS proforma.
Organizations maintaining or migrating legacy OSI/CLNP deployments where standardized CLNP-over-802 behavior is required.

Related standards

ISO/IEC 8473-1: CLNP protocol specification
ISO/IEC 7498-1: OSI Basic Reference Model
ISO/IEC 8348: Network service definition
ISO/IEC 8648: Network layer internal organization
ISO/IEC 8802-2: LLC (logical link control)
ISO/IEC 9646-1: Conformance testing methodology

ISO/IEC 8473-2:1996 PDF

Technical details

Abstract

Overview

Key topics and requirements

Applications and who uses it

Related standards

Related standards

Abstract

Overview

Key topics and requirements

Applications and who uses it

Related standards

Related standards

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