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A Unified LISP Mapping Database for L2 and L3 Network Virtualization Overlays

A Unified LISP Mapping Database for L2 and L3 Network Virtualization Overlays. Draft-hertoghs-nvo3-lisp-unfied-control-plane Yves Hertoghs. Overview. Complementary to draft-maino-nvo3-lisp-cp

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A Unified LISP Mapping Database for L2 and L3 Network Virtualization Overlays

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  1. A Unified LISP Mapping Database for L2 and L3 Network Virtualization Overlays Draft-hertoghs-nvo3-lisp-unfied-control-plane Yves Hertoghs

  2. Overview • Complementary to draft-maino-nvo3-lisp-cp • draft-maino represents the LISP mapping of the NVO3 reference models, and how the LISP Control Plane works with a couple of data plane options ((LISP+L2-LISP, LISP-GPE, VXLAN-GPE) • draft-maino defines how to use LISP for MAC Address lookups in an NVO3 context, and addresses VM Mobility at L2. • draft-hertoghs points to draft-maino where required and defines a unified L2/L3 approach, with distributed gateways on all the NVEs and addresses VM mobility at L2 and L3. • Draft-hertoghs maps the LISP functionality onto the NVO3 dataplane and control plane requirements drafts. • Hence draft-hertoghs should be used as an input into the NVO3 Gap Analysis draft.

  3. Unified L2/L3 NVE • Effectively a collocation of an NVO3 distributed gateway and NVE • An NVE that offers simultaneous support for IP and non-IP traffic, independent of subnets and VN location. • IP and MAC TS addresses are registered to support IP. • MAC TS addresses are registered to support non-IP (when needed) • Forwarding of all IP traffic involves an IP lookup (intra- and inter-subnet/VN traffic), forwarding on non-IP involves a MAC lookup. • Registering both IP and MAC addresses for IP aids ARP/IPv6 ND handling as well as rewrites to allow transparency for intrasubnet IP forwarding from a host perspective. • Why? • Optimal forwarding for IP traffic, no traffic tromboning independent of TS location, or intra- versus inter subnet/VN • Single lookup for IP traffic independent of destination • No need for DC wide broadcast domains to achieve Mobility intra-subnet

  4. Requirements for L2/L3 NVE • All NVEs participating in an NVI MUST offer a uniform default gateway IP and MAC address across the NVO3 network • All traffic between TSes MUST traverse across an NVE • IP traffic MUST always be subject to an IP lookup, regardless of inter- versus intra-subnet/VN relationship of source /destination IP address.

  5. Request to WG • Add LISP as control plane option, and LISP, VLAN-GPE and LISP-GPE as data plane options for NVO3, into the Gap Analysis draft. • Add Unified L2/L3 NVE as a concept in the architecture/framework drafts. • Use draft-hertoghs as input to the Gap Analysis draft. • (draft-maino and draft-hertoghs, or at least parts of it, will also be progressed further in the LISP WG, potentially to become WG documents).

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