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---
bookToc: false
title: "GENEVE"
weight: 21
---
# GENEVE
## 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
|
