efm_oam_tutorial_2004_03_31.pdfVIP

1ACCESS BRILLIANCE EFM OAM Tutorial - March 2004 EFM OAM Tutorial Current as of IEEE P802.3ah/D3.2? Kevin Daines Editor, EFM OAM Sub-task force 2ACCESS BRILLIANCE EFM OAM Tutorial - March 2004 Agenda g Overview g OAM Protocol Data Units (OAMPDUs) g Events n Critical Link Events n Link Events g Variable Retrieval g Remote Loopback n Internal block diagram n Starting and exiting timing diagrams g Organization Specific Extensions g Discovery g Active Passive Modes 3ACCESS BRILLIANCE EFM OAM Tutorial - March 2004 Overview: Parent Organizations g IEEE 802 LMSC n Local Area Network/Metropolitan Area Network Standards Committee g IEEE 802.3 CSMA/CD n Carrier Sense Multiple Access with Collision Detect (CSMA/CD) Working Group n Commonly referred to as the Ethernet Working Group g IEEE P802.3ah Ethernet in the First Mile Task Force (EFM) 4ACCESS BRILLIANCE EFM OAM Tutorial - March 2004 Overview: OSI Layer Stack Application Presentation Session Transport Network Data Link Physical PMD PMA PCS PMD PMA PCS Reconciliation Sublayer (RS) MAC MAC Control Higher LayersOSI Reference Model Layers MEDIUM MEDIUM P802.3ah Layers GMII MII MDI MDI OAM = Operations, Administration, Maintenance MDI = Medium Dependent Interface (G)MII = (Gigabit) Media Independent Interface PCS = Physical Coding Sublayer PMA = Physical Medium Attachment PMD = Physical Medium Dependent PMD PMA PCS MEDIUM MII MDI 1 Gb Link Segment 100 Mb Link Segment 2/10 Mb Link Segment LLC Operations, Administration, and Maintenance (OAM) 5ACCESS BRILLIANCE EFM OAM Tutorial - March 2004 Overview: Objectives g OAM provides mechanisms to: n Monitor link operation and health n Improve fault isolation g Method: OAM data conveyed in basic (untagged) 802.3 Slow Protocol frames n Sent between two ends of a single link n Note: called a “DTE” in 802.3 terminology n Slow Protocols allows S/W implementation g Fills major requirement to reduce EFM OpEx 6ACCESS BRILLIANCE EFM OAM Tutorial - March 2004 Overview: Non-objectives