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Generic Network Virtualization Encapsulation draft-gross-geneve-00 Pankaj Garg [email protected]

Jesse Gross [email protected]

    Present Goal Proposal Call to Action

Agenda

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Present

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Network Virtualization is the key to Multi-Tenant Datacenters and Software Defined Networking It is driving renewed interest in tunneling, tagging and encapsulation schemes 4

Hardware endpoints, software endpoints and controllers can evolve at different rates, but existing formats don’t provide that flexibility 5

Existing Formats (VXLAN, NVGRE, STT)

  Lack extensibility to allow data plane innovation  No support for carrying meta data Tie in control plane that limits control plane innovation  Flood and learn, or other control plane semantics 6

Goal

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Extensible Encapsulation Format

  Allows data plane (hardware, software) and control plane to evolve and innovate at different rates Allows those innovations to be standardized later 8

Extensibility

  Many extensions have already been proposed for VXLAN and NVGRE: protocol type, OAM, security, etc.

 Evidence of need for extensibility rather than a counterargument VXLAN and NVGRE are fundamentally not extensible: pushing beyond the limited header space requires all supporting devices to update  Ecosystem need to avoid fragmentation 9

Proposal

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Outer UDP Header

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source Port = xxxx | Dest Port = Fixed Port | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 11

Geneve Header

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Ver| Opt Len |O|C| Rsvd. | Next Protocol | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Virtual Network Identifier (VNI) | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Variable Length Options | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 12

Geneve Options

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Option Class | Type |R|R|R| Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Variable Option Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 13

Call to Action

Consider Geneve as a candidate solution to address extensibility and decoupling of control/data plane requirements as input to the gap analysis draft.

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