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Draining the Virtualization Swamp

Draining the Virtualization Swamp. T11/08-554v1 31 October 2008 Bob Nixon ( bob.nixon@emulex.com ). Draining the Virtualization Swamp.

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Draining the Virtualization Swamp

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  1. Draining the Virtualization Swamp T11/08-554v1 31 October 2008 Bob Nixon (bob.nixon@emulex.com)

  2. Draining the Virtualization Swamp • The prior version of this presentation (T11/08-544v0) gave a tutorial introduction to resolving some remaining issues with the FC virtualization architectural model • This version omits the tutorial and includes changes recommended by those who reviewed the first version. • It also attempts to resolve two issues that remained incomplete after the last meeting week: • node container Platform - FC-GS-x for a system-level entity that acts as an endpoint for Fibre Channel communication. • “Platform devices include end devices attached to the Fabric through a Fibre Channel Node and its associated Ports. Examples of platform devices are host systems and storage subsystems. Fibre Channel Nodes and their associated Ports are contained within a platform device.” • Add a Multiplexer, that performs the FC-2M function (requested by FC-SW-5). T11/08-554v1

  3. Architectural Model T11/08-554v1

  4. New/revised terminology • FC-2 Multiplexer sublevel: The sublevel in the Fibre Channel architecture that routes frames between FC-2V instances (e.g., VN_Ports) and one or more LCFs, based on the D_ID in the Frame_Header (see 9.5) and the VF_ID in the VFT_Header if there is a VFT_Header (see 10.2.4). • FC_Port: A port that is capable of transmitting and receiving Fibre Channel frames according to the FC-0, FC-1, FC-2P, FC-2M and FC-2V levels of the Fibre Channel architecture. An FC_Port contains at least one LCF and at least one VN_Port, and may contain other types of FC-2V instances (e.g., an F_Port Controller) (see FC-SW-5). Note: This standard does not specify the operation of more than one LCF in a single FC_Port. • Multiplexer: An entity that provides the functions of the FC-2M sublevel. • node: A collection of one or more VN_Ports controlled by a level above FC-2. Frames received at a node are not forwarded to another node. • Platform: A container for one or more nodes and one or more LCFs. Frames received at a Platform are not forwarded to another Platform. Any additional characteristics of a Platform are outside the scope of this standard. • PN_Port: An LCF in a Platform. • VFT Tagging PN_Port: A PN_Port operating with a Multiplexer that has enabled processing of Virtual Fabric Tagging Headers. • vnode: Synonymous with node. The term vnode is used when it is desired to emphasize support for multiple nodes in a single Platform. T11/08-554v1

  5. Architectural text • The architectural components associated with a Fibre Channel node are: • a Platform, that contains one or more vnodes; • one or more vnodes, each of which identifies a collection of one or more ULPs and their FC-4 mappings, an FC-3 level, and one or more VN_Ports; • one or more ULPs, which are application protocols carried over Fibre Channel; • an FC-4 mapping for each ULP onto the FC-3 functions offered by the vnode and the FC-2 functions offered by each VN_Port; • one or more VN_Ports, each of which is an independent end point for Fibre Channel communication; • one or more Multiplexers, each of which routes frames between a set of VN_Ports and a set of PN_Ports; and • one or more PN_Ports, each of which is an LCF that operates a Fibre Channel link. • The architectural model of a Switch may be found in FC-SW-5. T11/08-554v1

  6. Impact: much less than I expected • Glossary updates where needed • Change node to Platform • 59 in FC-FS-3, (mostly in Clock Synch, e.g., “node delay”. Is this really necessary?) • about 10 in FC-LS-2 (in RSCN and RNID) • Hand-wave for ENode in FC-BB-5. It’s not too badly misaligned. • 1 in FC-SW-5 • Several in FC-SB-4, or, require one vnode to one platform • FC-GS-6 is a future hook on which I am already caught • Change PN_Port or its context • In FC-FS-3: ~40, most concerning VF capable PN_Ports • in FC-LS-2 (actually, 08-379v1): ~40 mostly for VF capable PN_Ports T11/08-554v1

  7. Are we there yet? T11/08-554v1

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