Generic Network Virtualization Encapsulation draft-gross-geneve-00 Pankaj Garg Jesse Gross

Agenda  Present  Goal  Proposal  Call to Action 2

Present 3

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 7

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 10

| Source Port = xxxx | Dest Port = Fixed Port | | UDP Length | UDP Checksum | Outer UDP Header 11

|Ver| Opt Len |O|C| Rsvd. | Next Protocol | | Virtual Network Identifier (VNI) | Reserved | | Variable Length Options | Geneve Header 12

| Option Class | Type |R|R|R| Length | | Variable Option Data | Geneve Options 13

Call to Action 14 Consider Geneve as a candidate solution to address extensibility and decoupling of control/data plane requirements as input to the gap analysis draft.