IEEE Std 802.1Qcx-2020 PDF

Full title and description

IEEE Standard for Local and Metropolitan Area Networks — Bridges and Bridged Networks Amendment 33: YANG Data Model for Connectivity Fault Management (IEEE Std 802.1Qcx-2020). This amendment specifies a UML-based information model and YANG modules that provide configuration, status reporting and monitoring for Connectivity Fault Management (CFM) for Two‑Port MAC Relays, Customer VLAN Bridges and Provider Bridges as an extension to IEEE Std 802.1Q‑2018.

Abstract

This amendment defines a standardized YANG data model (and companion information model) to enable programmatic configuration and operational monitoring of CFM functions in bridged networks. It maps CFM concepts from IEEE Std 802.1Q into YANG modules so network management tools using NETCONF/RESTCONF and YANG can configure and retrieve CFM state, diagnostics and health information for bridges and MAC relays.

General information

• Status: Superseded (listed as a superseded / withdrawn amendment in some catalogs).
• Publication date: October 5, 2020 (Board approval documented June 4, 2020).
• Publisher: IEEE (IEEE Standards Association / IEEE Computer Society).
• ICS / categories: Networking — LAN/MAN standards; networking category 35.110.
• Edition / version: 2020 — Amendment 33 to IEEE Std 802.1Q‑2018 (designated IEEE Std 802.1Qcx‑2020).
• Number of pages: 123 pages (published PDF length as listed in standards catalogues).

Scope

The standard amends IEEE Std 802.1Q‑2018 by specifying a Unified Modeling Language (UML) information model and YANG modules that represent CFM entities, relationships and operations defined in the base standard. It covers configuration data, operational state, diagnostics and monitoring primitives required to manage CFM for two‑port MAC relays, customer VLAN bridges and provider bridges, and is intended to interoperate with related 802.1Q YANG work such as the initial YANG introduction in IEEE Std 802.1Qcp‑2018.

Key topics and requirements

• YANG data model definitions for CFM configuration and operational state.
• UML-based information model mapping CFM concepts to management data structures.
• Support for CFM functions: maintenance domains/associations, MEPs/MIPs, continuity, connectivity and fault diagnostics.
• Applicability to Two‑Port MAC Relays, Customer VLAN Bridges and Provider Bridges (per 802.1Q CFM clauses).
• Alignment with management protocols and practices used with YANG (NETCONF/RESTCONF toolchains).
• Amendment to 802.1Q‑2018 — not a standalone base 802.1Q document; intended for implementers augmenting the base standard.

Typical use and users

Primary users are network equipment vendors (switch/bridge firmware and management agents), network management system developers, integrators and network architects who need a standardized YANG representation of CFM to automate configuration, monitoring and diagnostics in carrier, enterprise and provider-managed bridged networks. It is used when programmatic control or telemetry of Ethernet CFM is required.

Related standards

Directly related to IEEE Std 802.1Q‑2018 (base Bridges and Bridged Networks) and to work that introduced YANG for 802.1Q (IEEE Std 802.1Qcp‑2018). The amendment is part of the 802.1 family of bridging/LAN protocol standards and should be considered alongside other 802.1Q YANG amendments and base clauses on CFM.

Keywords

IEEE 802.1Qcx, 802.1Q, CFM, Connectivity Fault Management, YANG data model, UML information model, bridges, MAC relay, network management, NETCONF, RESTCONF, amendment 33

FAQ

Q: What is this standard?

A: IEEE Std 802.1Qcx‑2020 is Amendment 33 to IEEE Std 802.1Q‑2018 that defines a UML information model and YANG modules for Connectivity Fault Management (CFM) in bridged networks.

Q: What does it cover?

A: It covers YANG-based configuration and operational state modeling for CFM, including definitions needed to configure maintenance domains, endpoints (MEPs/MIPs), continuity checks, connectivity verification and fault diagnostics for bridges and MAC relays.

Q: Who typically uses it?

A: Network equipment vendors, firmware/agent developers, NMS and automation tool developers, and network architects who require standardized programmatic access to Ethernet CFM functions.

Q: Is it current or superseded?

A: The document was published on October 5, 2020. IEEE lists it as a superseded standard in the 802.1 product listing; some national catalogues also mark it withdrawn. Users should verify whether later 802.1Q amendments or consolidated revisions have incorporated or superseded its content before relying on it.

Q: Is it part of a series?

A: Yes — it is one amendment within the broader IEEE 802.1Q family (Bridges and Bridged Networks). It specifically amends IEEE Std 802.1Q‑2018 and is related to other 802.1Q YANG and management amendments (for example 802.1Qcp‑2018).

Q: What are the key keywords?

A: CFM, YANG, UML, bridges, MAC relay, 802.1Q, network management, diagnostics, NETCONF, RESTCONF.