Report: add geneve to perf release notes

[csit.git] / docs / report / introduction / methodology_geneve.rst

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+.. _geneve_methodology:
+
+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 |
++----------------+-------------+