Generic Network Virtualization Encapsulation

GENEVE Prefix Bindings

GENEVE prefix bindings should be representative to target applications, where a packet flows of particular set of IPv4 addresses (L3 underlay network) is routed via dedicated GENEVE interface by building an L2 overlay.

Private address ranges to be used in tests:

• East hosts ip address range: 10.0.1.0 - 10.127.255.255 (10.0/9 prefix)

  • Total of 2^23 - 256 (8 388 352) of usable IPv4 addresses

  • Usable in tests for up to 32 767 GENEVE tunnels (IPv4 underlay networks)

• West hosts ip address range: 10.128.1.0 - 10.255.255.255 (10.128/9 prefix)

  • Total of 2^23 - 256 (8 388 352) of usable IPv4 addresses

  • Usable in tests for up to 32 767 GENEVE tunnels (IPv4 underlay networks)

GENEVE Tunnel Scale

If N is a number of GENEVE tunnels (and IPv4 underlay networks) then TG sends 256 packet flows in every of N different sets:

• i = 1,2,3, … N - GENEVE tunnel index

• East-West direction: GENEVE encapsulated packets

  • Outer IP header:

    • src ip: 1.1.1.1

    • dst ip: 1.1.1.2

  • GENEVE header:

    • vni: i

  • Inner IP header:

    • src_ip_range(i) = 10.(0 + rounddown(i/255)).(modulo(i/255)).(0-to-255)

    • dst_ip_range(i) = 10.(128 + rounddown(i/255)).(modulo(i/255)).(0-to-255)

• West-East direction: non-encapsulated packets

  • IP header:

    • src_ip_range(i) = 10.(128 + rounddown(i/255)).(modulo(i/255)).(0-to-255)

    • dst_ip_range(i) = 10.(0 + rounddown(i/255)).(modulo(i/255)).(0-to-255)

geneve-tunnels	total-flows
1	256
4	1 024
16	4 096
64	16 384
256	65 536
1 024	262 144